VEHICLES, CAMPERS, and BOATS > General Maintenance, How to/DIY projects

Pump

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BobbyB:
I'm currently doing a 2x a month drain and fill on the transmission on XJ to eventually swap out all 12-14 qts of fluid. While laying under it, and watching the fluid drain out, I had a thought of a pump. I don't want to take XJ to the dealership or a lube place to have them use their pump and charge way to much, so how hard would it be to make my own?

My thoughts were since you can order ,most if not all, fluids necessary for your vehicle in bulk, it should be relatively easy. Acquire a 5 gallon bucket, mark it off in quarts, drop in the tube which is hooked to a pump and it should push the new fluid in, while pushing the old crap out.

So what kind of pump and how big, where to source it? If I can get what I need, I will give this a shot. If it's a losing battle, and just as effective to do a drain and fill, repeat then filter swap, then that's what I'll do. Just an idea.

Flyin6:
Bobby,
Some information needed here
But first, are you changing fluid on your transmission every 2 months? Or am I reading that wrong?
Now I am assuming you are looking at recirculating the fluid in the unit, or just pumping it free of as much fluid as you can, then recharging, or???

I've never seen anyone need to change trans fluid as much. For a vehicle in severe usage, I'd be pulling fluids and testing with Willie or similar knowledgeable lubrication specialist. But those fluid changes are only needed about every 20K

When I was crewing M-60A1/A3 tanks back in the day long before I sprouted wings, when I wore those big yellow stripes running all up and down like. back then we didn't change fluids that often in the transmissions. I want to say we were running SAE 10 wt motor oil and changing it annually, I think.

Just no need to increase the duty cycle, and I don't know anything that is more of a severe use and abuse on a transmission than pushing around 50-60 tons of main battle tank...

BobbyB:

--- Quote from: Flyin6 on October 25, 2014, 09:36:55 AM ---Bobby,
Some information needed here
But first, are you changing fluid on your transmission every 2 months? Or am I reading that wrong?
Now I am assuming you are looking at recirculating the fluid in the unit, or just pumping it free of as much fluid as you can, then recharging, or???

I've never seen anyone need to change trans fluid as much. For a vehicle in severe usage, I'd be pulling fluids and testing with Willie or similar knowledgeable lubrication specialist. But those fluid changes are only needed about every 20K

When I was crewing M-60A1/A3 tanks back in the day long before I sprouted wings, when I wore those big yellow stripes running all up and down like. back then we didn't change fluids that often in the transmissions. I want to say we were running SAE 10 wt motor oil and changing it annually, I think.

Just no need to increase the duty cycle, and I don't know anything that is more of a severe use and abuse on a transmission than pushing around 50-60 tons of main battle tank...

--- End quote ---

Every 2 weeks, I'm draining 3 qts from the trans pan, and re-filling, until I reach 12 qts (which is XJs total amount) from the trans/torque converter. I doubt the previous owner and his dad (who owns a lube shop) ever changed it, and I'm at 209,xxx. I don't want to pay a dealership or lube shop beaucoup money to flush out the old and add new. That's why I'm trying to work up an idea for a pump to do it all myself in one swoop instead of drain and fills until I cycle all the old out gradually.

In hindsight after, re-reading my post, I probably should I read and clarified, but I was typing as the ideas and thoughts popped into my head.

KensAuto:
It would be easier to use the pump that's in the trans, officially known as the "hoot" method. Take the lines off of the radiator, put hoses on them, put one in an empty bucket (the pressure/outlet!...usually the lower one on the radiator), the other in a bucket full of new fluid. Not only does this way get all of the old fluid out, it gently flushes it.
Other option would be to just put the outlet in a bucket, start it, let run a couple-to-a-few seconds, add same amount of new thru dipstick, and repeat. First way is better so you won't run the pump dry.
...and then there's the most common way. Drop the pan and filter so you get the most fluid out, and go every 30k with a drain and refill, and every other time do the filter/pan drop. This is the way I do it because usually I see people going 80k+ before they bring it in for service. If I were to flush those cars, putting that much new trans fluid in all at once (think very high detergent) it could potentially cause issues (that I of course would be blamed for), breaking down varnish and build up in solenoids, valves and whatever else.

BobbyB:

--- Quote from: KensAuto on October 25, 2014, 02:19:24 PM ---It would be easier to use the pump that's in the trans, officially known as the "hoot" method. Take the lines off of the radiator, put hoses on them, put one in an empty bucket (the pressure/outlet!...usually the lower one on the radiator), the other in a bucket full of new fluid. Not only does this way get all of the old fluid out, it gently flushes it.
Other option would be to just put the outlet in a bucket, start it, let run a couple-to-a-few seconds, add same amount of new thru dipstick, and repeat. First way is better so you won't run the pump dry.

--- End quote ---

No trans cooler on the XJ. I thought of that, but when I went to look before I started the process.. nothin. No tow package for me! lol

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