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Discussion Starter #1
Was driving on highway, trans has been slipping in higher gears for the past year or so, and I floored it to pass someone and it just let go. Coasted to the shoulder where I got no movement in any gear selection (auto trans) and no change in 4hi/4low. When I shift from park I hear no noise internally and tac does not move at all. Is it safe to say it is most likely the trans? I started pulling drive shafts but don't wanna pull everything until I am pretty confident what it is.
 

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Discussion Starter #4 (Edited)
I had music on pretty loud but I am pretty sure there was no major clanking or metallic sounds. Just let go. My assumption was the torque converter, but just don't have enough experience to say for sure. Like I said, it was slipping for a while so it wasn't totally out of the blue

Edit: The only real troubleshooting I have done on it was what I said in the beginning and I got underneath while someone 'shifted' gears on the column. The shift cable was actuating.
 

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Discussion Starter #8
I know this is a dumb question, but did you check your fluid level? Just covering the basics that haven't been mentioned yet.
Fluids look good. Changed transfer case fluids about two days before it happened. I assume that is just coincidence. Trans was done around 2 years ago but only driven 10-15k miles since then. Color looks good in it and lvls are fine. Rained today and long day at work so don't feel like yanking anything but maybe tomorrow.

If it's your transmission I still have my wrecked truck for parts, and I'm in mays landing so I'm not too far from ya.
Might be worth taking a look at if it comes down to swapping trans. Would just have to mess with output shaft I assume so it would work with transfer case.


Or input shaft.
I assume if that's the issue I will see something when I pull it? Signs of grinding or what not.
 

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Discussion Starter #9
I also blew a u-joint about three weeks ago. But All my mechanical knowledge would assume that that has nothing to do with it. (Rear U joint on rear driveshaft.) Only negative effect I could see that having would be when I put it in park the rpm's were above idle and a tiny clanking noise. Drove it around 150 miles after that.
 
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Check if you have pressure by hooking a manometer on the left of the tranny. If pressure lower than 300psi, your tranny pump is KO. If pressure, check oil flow by disconnecting the tranny fluid at the radiator cooler and start engine, if no flow, Could be torque converter or internal failure. Try this first, but I am sûre you will have TO remove the tranny for an overhaul.
 

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Discussion Starter #11
Check if you have pressure by hooking a manometer on the left of the tranny. If pressure lower than 300psi, your tranny pump is KO. If pressure, check oil flow by disconnecting the tranny fluid at the radiator cooler and start engine, if no flow, Could be torque converter or internal failure. Try this first, but I am sûre you will have TO remove the tranny for an overhaul.
Just to double check, assuming I can get my hands on a manometer, a psi lower than 300 is good or bad?
 
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Just get a pressure tester with maximum reading 300psi, I don't remember what the pressure was, but when my pump went bad, it was grinding inside, and the pressure was very low, if the pump is working and fine, you should have no noise and a nice pressure (but less than 300psi).

so you have no shift at all? reverse? forward?
 

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Discussion Starter #14 (Edited)
Yea no movement or response from rpm gauge in any gear. No grinding noise either though. Just nothing.


Edit: But I did look under and see the selector cable moving and it switching 'gears' and the shifter was moved to different settings
 
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Yes, but we need to know if you have pressure. Do you have a pressure gauge?
 
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just try this: disconnect the tranny hose on the right of the cooler (bottom of your radiator if you have no external cooler, output of tranny), have a bucket to collect the oil (start engine), and have someone to maintain the hose in the bucket, then start the engine. No need to leave it too long, if you have oil flow you should have a lot coming out. (in case no flow, we will see if it is due to the pump (pressure test), BOOST valve, or TC/input shaft. let's try.
 
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