Hello Guest

Poll

First poll on RMTS! What 14-bolt axle should I build?

OPTION A: GLO diff cover, Keep 3.73 gear ratio, use stock gov-lock differential, no TMR Shave kit.
OPTION B: GLO diff cover, Change to 3.55 gear-ratio, new Grizzly locker, no TMR Shave kit.
OPTION C: GLO diff cover, Full-tilt: 3.55 gear-ratio, new Grizzly locker, TMR Shave kit.
OPTION D: GLO diff cover, keep 3.73 gear ratio, new Grizzly locker, TMR Shave kit (Ken's option)

Author Topic: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion  (Read 62932 times)

0 Members and 1 Guest are viewing this topic.

Offline KensAuto

  • Moderator
  • ***
  • Posts: 7684
  • My abuser is named Nate
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #100 on: March 01, 2015, 05:32:01 PM »
Hmm, if it was a G80, it would turn like an open unit, right? Unless you spun it really fast. Guess this shows everyone how (un)knowledgeable I am on diffs. Just enough to make me dangerous. haha
Underpaid and misunderstood since 2014

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #101 on: March 01, 2015, 05:33:06 PM »
I think it is a Gov-Lock. It is not an open differential, I verified that already.
Gov locks don't lock up at slow speeds like when we were rotating the axles

The littler spinner thing has to spool up to lock the diff. That happens when a differential of axle speeds occurs. That is why I thought you had an old school Detroit locker.
Stop over my house and i'll jack up SquareD and spin the rear tires. You'll hear what a locker, an old school locker sounds like. No mistaking all that clacking going on in there!

Possibly some sort of a locker, possibly some sort of limited slip, maybe even an open...
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #102 on: March 01, 2015, 05:48:54 PM »
Hmm, if it was a G80, it would turn like an open unit, right? Unless you spun it really fast. Guess this shows everyone how (un)knowledgeable I am on diffs. Just enough to make me dangerous. haha
But it doesn't look like a G80

I sold one out of my 11.5 AAM axle a couple years ago and you could tell it was a G80. This thing in this 14 bolt does not look like that, unless I haven't seen all of it and missed the governor pin thing
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #103 on: March 01, 2015, 05:50:01 PM »
These pics show up when I google gov-lock:

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #104 on: March 01, 2015, 05:50:37 PM »
Looks a lot like what I have...

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #105 on: March 01, 2015, 06:01:12 PM »
Here is a pic I found of the military 1008 1 ton K30 truck with it's full on locker diff:

Looks more like the one in Duane's garage???
« Last Edit: March 01, 2015, 06:06:48 PM by Flyin6 »
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #106 on: March 01, 2015, 06:12:02 PM »
The diff site I was viewing is calling this a "Gov-Lock open differential"

Very confusing, as a gov lock is a locking diff, but perhaps they list is as an open diff just because it acts like an open diff during normal operation.

This one is the one in Duane's 14 bolt and differs from the 1008 Detroit locker which is basically just the core of an open diff swapped out from spider gears to locker device
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #107 on: March 01, 2015, 06:29:11 PM »
You are making me curious to open mine up. I did some math too and the 4.10s might be OK, showing 1800 rpm at 70mph.

Looks like the 14bt gov lock uses just 3 spiders vs 4 of the open or locker, here is a pic I found, blowed up!!
« Last Edit: March 01, 2015, 06:33:07 PM by JR »
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #108 on: March 01, 2015, 07:08:27 PM »
First time I ever saw 3 shafts

But that explains something

When I was looking at Duane's in the pic, I was not seeing the next shaft which should have been some 90 degrees  off from the one in the foreground. So I was thinking "Is that a 2 shaft locking diff, is there such a thing???"

So your exploded view of an exploded 3 pin diff explains all that. And you can see the little spinner device.
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #109 on: March 01, 2015, 07:28:50 PM »
I thought the 14bt rears were all 4 spider setups and you added a locker the the housings. I am no expert either by any means.

I have blown MANY 12 bolt (gm 8.875) rears but hear of few 14bt or 11.5aam doing that.
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #110 on: March 01, 2015, 07:42:46 PM »
here is another showing the same 120* spacing for the gov-loc. Another pic showed you can see the clutch plates too without opening the case.
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

Offline EL TATE

  • Registered
  • **
  • Posts: 3180
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #111 on: March 01, 2015, 08:03:46 PM »
AAM made the case. The Detroit is inside.  Std open 4 pin case the Detroit replaces the spiders.  You'll need two people for this experiment but hold one shaft and have someone turn the other.  They week want to go the same direction. While applying tension clockwise, suddenly jerk one the opposite direction and it should pop loose and ratchet. Slowly come back and it will lock back in.  You may be able to do this on your own if you turn one way the hard back the opposite.  Might not have enough force though. Definitely not g80.
Husband, Father, Gear guy, Patriot.

Offline EL TATE

  • Registered
  • **
  • Posts: 3180
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #112 on: March 01, 2015, 08:07:32 PM »
That's what happens when you don't read the last post.  My condolences on your Gov lock Duane. 
Husband, Father, Gear guy, Patriot.

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #113 on: March 01, 2015, 08:51:49 PM »
That's what happens when you don't read the last post.  My condolences on your Gov lock Duane. 
That's JR's
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline KensAuto

  • Moderator
  • ***
  • Posts: 7684
  • My abuser is named Nate
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #114 on: March 01, 2015, 08:56:17 PM »
Tate, I thought he said it was "locked" tho. If it's locked when he turns it, it has to be Detroit right?
A gov loc wouldn't do that when brand new.

I guess it boils down to 3 or 4 pins.
Underpaid and misunderstood since 2014

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #115 on: March 01, 2015, 08:57:49 PM »
Tate, I thought he said it was "locked" tho. If it's locked when he turns it, it has to be Detroit right?
A gov loc wouldn't do that when brand new.

I guess it boils down to 3 or 4 pins.
Yea, no 3 pin Detroit lockers, only the 4 pin
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #116 on: March 01, 2015, 09:23:50 PM »
My axle is pictured on posts 95 and 96.  The other pictures posted are pulled from other sites.  Confusing, I know.  My differential case appears to have 3 pins, which makes it a Gov lock.  Its not broken, at least not yet!   
« Last Edit: March 01, 2015, 09:25:07 PM by Dustoff35 »

Offline EL TATE

  • Registered
  • **
  • Posts: 3180
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #117 on: March 01, 2015, 09:54:35 PM »
Unfortunately, a gov lock that's locked up is a common issue.  If it's sat for some time it could just be rust holding the governor in place. 
Husband, Father, Gear guy, Patriot.

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #118 on: March 02, 2015, 08:32:46 AM »
The axle had no more than 100 miles on it when BAE Systems pulled it off of the Suburban and palletized it.  The Axle then sat for years.  New friction plates or clutches in the gov-lock combined with years of storage, it may be locked up.  Inside the case looks pretty clean so I doubt rust is much of an issue.     

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #119 on: March 02, 2015, 12:50:14 PM »
How thick are those rods for the cleaner. I am seeing carbon welding rods in 3/8in. Will those work or do you need to remove the coating?

Got my 60 hubs and they need a good cleaning, thought I would try that anode cleaner.
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #120 on: March 02, 2015, 07:09:03 PM »
How thick are those rods for the cleaner. I am seeing carbon welding rods in 3/8in. Will those work or do you need to remove the coating?

Got my 60 hubs and they need a good cleaning, thought I would try that anode cleaner.

Closer to 3/4 in.  You don't have to use Carbon gouging rod, you can use rebar too.  The Carbon rods just make for a cleaner process.  The nice thing about electrolytic cleaning is that threads and other delicate surfaces will not be damaged.  Only the rust is removed.
« Last Edit: March 02, 2015, 07:10:50 PM by Dustoff35 »

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #121 on: March 02, 2015, 07:51:31 PM »
How thick are those rods for the cleaner. I am seeing carbon welding rods in 3/8in. Will those work or do you need to remove the coating?

Got my 60 hubs and they need a good cleaning, thought I would try that anode cleaner.

Closer to 3/4 in.  You don't have to use Carbon gouging rod, you can use rebar too.  The Carbon rods just make for a cleaner process.  The nice thing about electrolytic cleaning is that threads and other delicate surfaces will not be damaged.  Only the rust is removed.

Thx, I did couple searches and found that some were using rebar. Picked up some soda today and I have rebar so I am set.
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

OldKooT

  • Guest
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #122 on: March 02, 2015, 08:44:06 PM »
I use old strips of 55 gallon drum I cut about 5" wide and whatever length fits my cleaning container. I have found the large flat surfaces clean faster/better and are easily disposed of. They are also easy to position to hang where needed.

When doing small parts such as bolts and nuts I use Oxalic acid for those.


Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #123 on: March 13, 2015, 08:33:19 AM »
Two weekends of out-of-town hockey tournaments; I'm just about caught up now…
 
Back to axles:

A little disassembly:

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #124 on: March 13, 2015, 08:38:28 AM »
Wheel studs after a little electrolytic rust removal:

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #125 on: March 13, 2015, 08:41:44 AM »
Surgery begins:

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #126 on: March 13, 2015, 08:43:22 AM »
Pardon the low-buck axle dolly…

It works!

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #127 on: March 14, 2015, 12:43:47 PM »
Removing the low-hanging Shock mounts and both sets of incorrectly spaced (for my truck) spring perches.


Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #128 on: March 14, 2015, 08:39:35 PM »
More cutting and removal of brackets.
« Last Edit: March 14, 2015, 08:41:35 PM by Dustoff35 »

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #129 on: March 14, 2015, 11:54:49 PM »
I like the rear end cart!!
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #130 on: March 16, 2015, 08:21:44 AM »
AAM 14bolt axle sans spring perches and factory shock mounts.

OldKooT

  • Guest
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #131 on: March 17, 2015, 07:34:51 AM »
I have to prep a 14 bolt the same way here soon. I never relish removing those OEM spring mounts. Now your ready for reassembly which is far more fun.


Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #132 on: March 21, 2015, 08:35:13 AM »
I have to prep a 14 bolt the same way here soon. I never relish removing those OEM spring mounts. Now your ready for reassembly which is far more fun.

It took longer than I thought it would to remove the four spring mounts, I went through more cutting wheels and grinding disks than I expected also.  I really need to get a quality angle grinder.  I had three HF grinders in queue as I worked on the axle. I would switch them out as they became too hot to handle...

OldKooT

  • Guest
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #133 on: March 21, 2015, 09:42:52 AM »
I keep saying I need a "quality" 4" angle grinder myself. I have a 15 year old craftsman I can't seem to kill, but it does at times get a bit hot (like once melted a rubber glove to my hand I use to avoid shocks it likes to produce randomly) LoL

I do have a larger 8" Milwaukee angle grinder for the big jobs. But that thing is a back breaker to run for a extended period of time and eats disks like they are paper.

My plan.... plasma/oxy torch most the weld off and then attack it with the large grinder.... we shall see how this works LoL

I have to stop buying new tools, or I won't have any $$$ left for the truck and will have to farm more. A situation I am trying to avoid.

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #134 on: March 21, 2015, 10:09:54 AM »
I keep saying I need a "quality" 4" angle grinder myself. I have a 15 year old craftsman I can't seem to kill, but it does at times get a bit hot (like once melted a rubber glove to my hand I use to avoid shocks it likes to produce randomly) LoL

I do have a larger 8" Milwaukee angle grinder for the big jobs. But that thing is a back breaker to run for a extended period of time and eats disks like they are paper.

My plan.... plasma/oxy torch most the weld off and then attack it with the large grinder.... we shall see how this works LoL

I have to stop buying new tools, or I won't have any $$$ left for the truck and will have to farm more. A situation I am trying to avoid.

I had that Craftsman as well!
It appears in some of the photos when I was derusting SquareD
Finally the cord started coming apart so I finally tossed it.
And know what else?
The Red dog never got it!
Remember what the red dog did to the new harbor freight grinder? Left me like two feet of chord sticking out of a chewed up handle to splice into
Irony is that all those chew marks in the handle actually provide more gripping surface!
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #135 on: March 22, 2015, 06:17:59 PM »
We have some axle parts!  Here is an odd-shaped package delivered courtesy of the USPS.  Inside is one of Great Lakes Off-Road's bulletproof covers.  This cover is half-inch steel, fully plated with 1/2 inch steel.  It is an awesome piece.

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #136 on: March 22, 2015, 06:22:19 PM »
More parts!  Here are some spring perches, also from GLO.  They are 1/4 inch steel.  I will need to open up the diameter a bit with a grinder to fit the AAM axle tubes. 

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #137 on: March 22, 2015, 06:24:56 PM »
Also, courtesy of Great Lakes Off-Road are these 1/2 inch steel spring plates.

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #138 on: March 22, 2015, 06:29:04 PM »
Here is a great item to protect that vulnerable u-joint out back, the GLO Pinion guard.  Also fabricated from 1/2 inch steel.
« Last Edit: March 22, 2015, 06:29:53 PM by Dustoff35 »

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #139 on: March 22, 2015, 06:32:42 PM »
I also have these shock mounts from Ruff Stuff Specialties.  They weld directly to the axle tube and will not hang below the line of the axle to snag on anything.

Offline EL TATE

  • Registered
  • **
  • Posts: 3180
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #140 on: March 23, 2015, 01:38:59 PM »
Here is a great item to protect that vulnerable u-joint out back, the GLO Pinion guard.  Also fabricated from 1/2 inch steel.
this guy makes me wish the 11.5 had a pinion support to bolt this sucker to. Great piece!
Husband, Father, Gear guy, Patriot.

Offline JR

  • Moderator
  • ***
  • Posts: 13536
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #141 on: March 23, 2015, 02:13:28 PM »
I can see a lot of those in my future!!!
Retired LEO  Lifetime NRA+  Outcast in Calif

"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants"

Thomas Jefferson

OldKooT

  • Guest
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #142 on: March 23, 2015, 03:51:57 PM »
Very nice selection of upgrades. I need to order a diff cover or two myself.

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #143 on: March 23, 2015, 07:14:26 PM »
One last item I forgot to post up.  Can anyone identify what this is? :o

OldKooT

  • Guest
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #144 on: March 23, 2015, 08:42:03 PM »
Wow planning to shave it also?

Offline KensAuto

  • Moderator
  • ***
  • Posts: 7684
  • My abuser is named Nate
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #145 on: March 23, 2015, 09:00:31 PM »
That is what we call a TMR. Custom TMR :)

You plan on rockcrawling that thing? or mallcrawling like Big D?
Underpaid and misunderstood since 2014

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #146 on: March 23, 2015, 09:45:02 PM »
That is what we call a TMR. Custom TMR :)

You plan on rockcrawling that thing? or mallcrawling like Big D?

Hey...
Malls are dangerous places
Our liberal media doesn't talk about it much, but many a brave warrior has met their match in those awful places!
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #147 on: March 26, 2015, 02:31:38 PM »
I'm not likely to do much rock-climbing but do recognize the poor rear axle clearance I'll have with a 33" tire.  Even the roads around Don's farm are deeply rutted and can snag an axle.  The TMR Shave will increase clearance by 1.5 inches.  That's the rough equivalent of 3 inches of tire size…


…So, its decision time in regards to the 14 bolt rear axle.  I have several options to ponder, each with its own advantages and disadvantages.  Lets lay them out and take a look:

OPTION: A

Button up the axle with the GLO cover, keeping the 3.73 ratio and stock Gov-Loc differential. No axle Shave. 

PROs:
1. The diff and gears are virtually new.
2. Easiest and least expensive option.

CONs:
1. Higher gear-ratio than I'd like with my intended tire size of 33".
2. Questionable Longevity / Durability of the Gov-Loc.
3. Poor ground clearance with the 33'" tires and the notoriously low-slung 14 bolt axle.
4. Have to purchase new gears for the D60 front axle; gear change / setup is more difficult on a D60 than a 14 bolt.

OPTION B:

Upgrade the differential to a Grizzly and change gears to a 3.55 ratio. No Shave kit.

PROs:
1. Ideal gear ratio for my power train and tire choice.
2. Will not have to buy new gears for the D60 front axle.
3. Bullet-proof differential, no future worries of a possible "Gov-bomb" incident.

CONs:
1. Have to disassemble and set-up gears in 14-bolt, although easier to do than in the D60.
2. Poor ground clearance with the 33'" tires and the notoriously low-slung 14 bolt axle. 
3. Cost.

OPTION C:

Full-tilt.  New 3.55 gears, New Grizzly locker, TMR Shave kit (no ring-gear machining req. on my model)

PROs:
1. Ideal gear ratio for my power train and tire choice.
2. Will not have to buy new gears for the D60 front axle.
3. Bullet-proof differential, no future worries of a possible "Gov-bomb" incident.
4. Rear axle clearance close to that of a D44.

CONs:
1. Have to disassemble and set-up gears in 14-bolt, although easier to do than in the D60.
2. Most work / time involved.
3. Highest cost.

What am I missing?



 

   
 
« Last Edit: March 26, 2015, 03:33:48 PM by Dustoff35 »

Offline Flyin6

  • Head cook and bottle washer
  • Administrator
  • *****
  • Posts: 34008
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #148 on: March 26, 2015, 03:27:27 PM »
I vote  "A"
Site owner    Isaiah 6:8, Psalm 91 
NSDQ      Author of the books: Distant Thunder and Thoren

Offline Dustoff35

  • Registered
  • **
  • Posts: 569
    • View Profile
Re: 1975 Dodge Crew Cab Power Wagon Build and Cummins 6BT Conversion
« Reply #149 on: March 26, 2015, 03:31:16 PM »
I vote  "A"

Did you vote in RMTS' first poll?  Its at the top of the thread...

 

SimplePortal 2.3.6 © 2008-2014, SimplePortal