Author Topic: 1986 K5 Blazer (Read 7581 times)

dave945 · « **Reply #50 on:** March 08, 2021, 09:01:25 PM »

Okay, so looking at the possible trip coming up. I found a 2002 Silverado, 5.3l 4x4, runs and drives. I’m thinking I should be able to take that truck, pull engine and trans and drop that In the blazer. I’ll have all the necessary parts, computer and harness that I should be able to get it up and running in time. New stock it would have been 285hp, which is a large improvement over the 5.0 that is in there now.

Any major concerns any of you have with this idea?

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stlaser · « **Reply #51 on:** March 08, 2021, 09:12:45 PM »

Nope, it’s been done many times. You using the entire driveline, meaning trans and t-case too?

JR · « **Reply #52 on:** March 08, 2021, 09:18:21 PM »

This supported really well in the aftermarket. Bolt in mounts. Check out Merricks garage on youtube, he did a blazer. Way past the basics now but the swap is still there.

stlaser · « **Reply #53 on:** March 08, 2021, 09:20:47 PM »

Local shop here cfm industries has a bolt in mount kit for that I believe.

dave945 · « **Reply #54 on:** March 08, 2021, 09:53:19 PM »

Quote from: stlaser on March 08, 2021, 09:12:45 PM

Nope, it’s been done many times. You using the entire driveline, meaning trans and t-case too?

Yes, at least engine and transmission, replacing the 700r4 that has been nothing but problematic as of late. Wasn’t sure about the transfer case.

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stlaser · « **Reply #55 on:** March 08, 2021, 10:03:13 PM »

Quote from: dave945 on March 08, 2021, 09:53:19 PM

Quote from: stlaser on March 08, 2021, 09:12:45 PM
Nope, it’s been done many times. You using the entire driveline, meaning trans and t-case too?
Yes, at least engine and transmission, replacing the 700r4 that has been nothing but problematic as of late. Wasn’t sure about the transfer case.

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Think you’ll need t-case too for the vss, you can adapt a 205 but it’s an expensive option to get it with vss as they only made it two years.

Edit: guess it’s not too expensive to mod a non vss case

https://www.offroaddesign.com/labor-to-machine-customer-s-np205-speedometer-housing-for-gm-vss-tone-wheel-plug-speed-sensor-and-pigtail-included.html

JR · « **Reply #56 on:** March 08, 2021, 10:07:53 PM »

You beat me to it Shawn, I was thinking the same.

stlaser · « **Reply #57 on:** March 08, 2021, 10:31:37 PM »

Quote from: JR on March 08, 2021, 10:07:53 PM

You beat me to it Shawn, I was thinking the same.

Also not sure what it takes to adapt a 205 to the 4L60E transmission. If you have an np203 case then the 241 (I think that’s what’s behind the 4L60E) is already an upgrade. Not quite as good as np205 but better than heavy chain driven 203

dave945 · « **Reply #58 on:** March 08, 2021, 10:37:24 PM »

If I remember correctly, I have the NP208 in the blazer now. I’m going to have to take a look in the morning and see what it has.

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JR · « **Reply #59 on:** March 09, 2021, 04:28:12 AM »

I had a 205 on my old 700R4, was just a output swap.

Why not just go with a newer chain drive case?

dave945 · « **Reply #60 on:** March 09, 2021, 06:50:20 AM »

My concern with swapping the transfer case is that the blazer is passenger side drop. My understanding is that the 02 Silverado is driver side. I could be wrong on that. I haven’t seen the truck I person yet, it’s at copart, hoping to get up there today or tomorrow.

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Nate · « **Reply #61 on:** March 09, 2021, 07:56:02 AM »

Dont quote me dave, but i believe all gm trucks from the mid 70's to present have always been factory passenger side drop

dave945 · « **Reply #62 on:** March 09, 2021, 08:41:32 AM »

I’m not going to quote you, but I really hope that is the case. It would be nice to pull the whole drivetrain and swap it.

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dave945 · « **Reply #63 on:** March 09, 2021, 10:20:46 AM »

Just confirmed, the blazer currently has an NP208

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JR · « **Reply #64 on:** March 09, 2021, 02:24:44 PM »

IFS, drivers side drop.

Solid axle, Pass drop.

So up to 1987 the transfer will be pass drop, cept blazer and sub until 1991.

Nate · « **Reply #65 on:** March 09, 2021, 02:57:43 PM »

Mark your calendars......!

I am wrong and incorrect in what i said!

JR · « **Reply #66 on:** March 09, 2021, 03:18:05 PM »

Not trying to correct anyone, just happen to have owned all, and still do some!

And I slept at a holiday inn before,,,,,,,,,,,,,,,,,,,

dave945 · « **Reply #67 on:** March 09, 2021, 03:40:29 PM »

Quote from: Nate on March 09, 2021, 02:57:43 PM

Mark your calendars......!

I am wrong and incorrect in what i said!

Dang it Nate!!! My calendar is getting all blacked out.

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EL TATE · « **Reply #68 on:** March 09, 2021, 06:59:42 PM »

Talk w/ Novak adaptors in SLC, I believe they have a kit

Flyin6 · « **Reply #69 on:** March 09, 2021, 07:57:28 PM »

Quote from: dave945 on March 08, 2021, 10:37:24 PM

If I remember correctly, I have the NP208 in the blazer now. I’m going to have to take a look in the morning and see what it has.

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I would think you'd have a 203 full time transfer in the blazer. Mine did
Dave, I for sure want you to come along with us
I do not however think you have enough time to swap all this around and get it running and tested by late June.
Have you thought this through? It seems like a ton of work, and with working a full time job, how does all that map out?
I'd say I'll come over and help out with the wrenching, but I know I'll be fully employed myself right up to launch date. Having said that. If you do this and want the helping hand, I'll find a way.

Flyin6 · « **Reply #70 on:** March 09, 2021, 07:59:02 PM »

Quote from: dave945 on March 09, 2021, 10:20:46 AM

Just confirmed, the blazer currently has an NP208

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Oops. guess I was wrong. But the 203 was very common in the K5's

JR · « **Reply #71 on:** March 09, 2021, 08:07:12 PM »

They had full time and part time. My 77 had a dana 44 front and the 205 and no cats! Kinda wish I still had it, but things change.

I think finding a tcase will not be that hard, maybe a shaft swap at the most. Swap should be easy too, it all bolts in. No real fabricating like putting a cummins in something.

dave945 · « **Reply #72 on:** March 09, 2021, 08:52:59 PM »

Quote from: Flyin6 on March 09, 2021, 07:57:28 PM

Quote from: dave945 on March 08, 2021, 10:37:24 PM
If I remember correctly, I have the NP208 in the blazer now. I’m going to have to take a look in the morning and see what it has.

Sent from my iPhone using Tapatalk
I would think you'd have a 203 full time transfer in the blazer. Mine did
Dave, I for sure want you to come along with us
I do not however think you have enough time to swap all this around and get it running and tested by late June.
Have you thought this through? It seems like a ton of work, and with working a full time job, how does all that map out?
I'd say I'll come over and help out with the wrenching, but I know I'll be fully employed myself right up to launch date. Having said that. If you do this and want the helping hand, I'll find a way.

Let me just say that this is the only way the blazer will make the trip. Saying that, I am not against buying a runabout that could make the trip and then Keeping it for the next driver in line to use.

However, let me also say that the way you wrote that makes me feel like I’ve been challenged. ;)

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stlaser · « **Reply #73 on:** March 09, 2021, 09:49:41 PM »

3 months, better get it moving.....

Flyin6 · « **Reply #74 on:** March 09, 2021, 10:01:38 PM »

Quote from: dave945 on March 09, 2021, 08:52:59 PM

Quote from: Flyin6 on March 09, 2021, 07:57:28 PM
Quote from: dave945 on March 08, 2021, 10:37:24 PM
If I remember correctly, I have the NP208 in the blazer now. I’m going to have to take a look in the morning and see what it has.

Sent from my iPhone using Tapatalk
I would think you'd have a 203 full time transfer in the blazer. Mine did
Dave, I for sure want you to come along with us
I do not however think you have enough time to swap all this around and get it running and tested by late June.
Have you thought this through? It seems like a ton of work, and with working a full time job, how does all that map out?
I'd say I'll come over and help out with the wrenching, but I know I'll be fully employed myself right up to launch date. Having said that. If you do this and want the helping hand, I'll find a way.
Let me just say that this is the only way the blazer will make the trip. Saying that, I am not against buying a runabout that could make the trip and then Keeping it for the next driver in line to use.

However, let me also say that the way you wrote that makes me feel like I’ve been challenged. ;)

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Only sending good vibes your way

Just thinking out loud really, be one heck of an accomplishment!

Sammconn · « **Reply #75 on:** March 10, 2021, 12:18:27 PM »

As I read it, it seemed like a challenge including an offer to assist!

dave945 · « **Reply #76 on:** July 30, 2021, 05:02:28 PM »

So, this may sound like a dumb question, but here goes. How can I diagnose if my transmission issues are actually possibly torque converter as opposed to my transmission (which I had rebuilt 5 years ago) being bad? I know there’s still a bit of work involved swapping it if that’s the issue, and might still have transmission issues, but don’t want to throw money at something that doesn’t need it.

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EL TATE · « **Reply #77 on:** July 30, 2021, 06:02:14 PM »

Good article from AAMCO here Dave.
https://www.aamcoblog.com/Article/Signs-of-a-Failing-Torque-Converter-and-How-to-Fix-it

dave945 · « **Reply #78 on:** September 16, 2023, 02:00:08 AM »

So this project is slowly being brought back out of the cobwebs. Tonight I pulled the transfer case, probably pull the transmission tomorrow if I can find the time.

My question for all of you is this: should I do a rebuild on the transfer case (NP208) while I have it out? If so, is there a recommended source for a rebuild kit? It’ll be my first time, but I should be able to figure it out with Google and YouTube.

Thoughts?

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stlaser · « **Reply #79 on:** September 16, 2023, 03:55:47 AM »

Still just trying to get it road worthy? Tate has reman t-cases, I’m not sure of np208 kits as I don’t mess with them but Tate again would be a go to on this. Also possibly torque king 4x4 out of Billings has a great website.

Flyin6 · « **Reply #80 on:** September 16, 2023, 09:04:18 AM »

I'd rebuild it if I could.
I have run the NP208 case in several applications and found it to be a good unit,
But
My question is how did that case get into your K5?
Should have been a full time NP203.
(I had a 79 K5 in Germany and it was full time, NP203)
Later on after Germany, I purchased a new 84 Scottsdale (Chevy truck) K10 and it had a NP208 case in it.
Mine stood up to 36" tires and a supercharged 350...

EL TATE · « **Reply #81 on:** September 29, 2023, 05:31:18 PM »

Quote from: dave945 on September 16, 2023, 02:00:08 AM

So this project is slowly being brought back out of the cobwebs. Tonight I pulled the transfer case, probably pull the transmission tomorrow if I can find the time.

My question for all of you is this: should I do a rebuild on the transfer case (NP208) while I have it out? If so, is there a recommended source for a rebuild kit? It’ll be my first time, but I should be able to figure it out with Google and YouTube.

Thoughts?

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ZTBK208 $83.00 in stock in MN. all the bearings and seals, small parts kit and gasket.
ZTCHHV025R $45 chain
ZMBSHWT297-62 $5.00 tail bushing
ZTNP4219073 $4.00 mode fork center pad
ZTNP4167970 $2.00 each range fork pads

thank should get you freshened up