jon-d

Even though I have less than 200k on my tranny I think it is finally giving up the ghost. Yesterday when I first started the vehicle up I was getting a loud wine from the front of the transmission and then as I backed out one of the trans cooling lines bursted. at first I thought that was the cause of it but after making the repair and adding in fluid (about 1.5 quarts) it still made the same noise. There were no prior leaks or indications of problems. After adding fluid I drove around the block to test drive it and it will go into reverse and drive but it won't go into second it'll just rev up as if it's a missed gear. It still had the wine noise as I drove it I was hoping it would go away but it did not. I also noticed it takes a second or two longer than normal for it to engage when I put it in it reverse/drive.

my question is how do the transmissions normally fail and what is their typicall failure? It seems like this failure was sudden and more catistrophic than what I would have expected. Also if anyone has suggestions for anything else to check that would be helpful.

Noah911

Reverse and second gears are messed up.. Hopefully, its not the whole transmission? I don't really know what I'm talking about with this, but I do remember reading on here something about this type of issue. I kind of remember I think.. what I read saying something about a specific part/piece of the whole system that can go down, or break? When it does, the reverse and second gears end up messing up and not work correctly. I hope I'm right for you? If so, I am pretty sure that can be fixed relatively easily? I'm not really sure though?

If I find it I'll let you know.

dave1123

According to my trans manual, if you only have 1st and reverse, you have either a governor or front servo fault. The governor can be checked electrically and the front servo can be pressure checked. Both by someone who is familiar with what to look for. The whine can be air getting into the pump by a loose filter. If that's the case, that could be the cause of the pressure problem.

jon-d

Thank you guys. Just checking around the prices for a rebuilt are around 900 and 1200 installed. I don't know if that includes the TC but seems pretty good for a transmission. I was thinking about pulling one from the junk yard but that is a gamble.

Happy Father's day BTW.

BlueRidgeMark

I think what Dave was saying is that it might not be toast. If you have a loose filter allowing air in, it's going to act like a bad trans. Check that angle out before dropping a bundle on the trans.

BTW, I don't think there is a reliable trans dealer online. Best to ask around for a local guy. (And I do NOT mean AAMCO! Stay away!!!!)

If you have a mechanic you trust, start by asking him. If not, ask at your local NAPA. They cater to the pros, and will often know who is good and who is not. Also check the price at your dealer. They may have a local guy they use.

dave1123

Yeah, there's a local shop that is trusted by many people and do excellent work, but he quoted me $3000 to rebuild a 42re! He said they put in an entirely new valve body and they have the longest warranty of anybody around. No thanks. My mechanic found me a rebuilt for $1800 installed and warrantied for 30K miles.

jon-d

My code reader is showing a 0740 "torque converter clutch circuit open"

I drove it again and it seemed normal at first, no shifting issues then after about a mile the noise started and it went back to the same issues.

I don't see any wiring problems, but could it be a faulty wire?

dave1123

It could be a lot of things, but you won't know until you get some pressure tests.

97grand4.0

My vote is air in the system with the broken line.

fb97xj1

Avoid AAMCO like the plague they are. I dealt with them once. ONCE. I have had better luck with much smaller mom and pop transmission shops, but they are becoming harder to find these days.

97grand4.0

"Avoid AAMCO like the plague they are."

True that. When I got my zj, the po took it there. It wouldn't shift at all when I bought it. They told him it was shot. Got home, took the pan down,..No filter. Screws in the pan. Solenoids disconnected. Put in a couple solenoids from teh bone yard for $14 and filled it up...whatya think.

dave1123

It worked? You must have put a filter in it too!

97grand4.0

Yeah it worked. Upshifts anyway. Still wouldn't downshift when coming to a stop, but, then I took the lockup solenoid out and blew the screens out. That fixed that. That lockup solenoid is still in there but the gov pressure sensor and the solenoid have been changed out for the borg warner. That was what..5 or 6 years ago. Oh the tranny has issues, but still my DD.
Aside, here is a link to a thread you might find interesting
https://www.cherokeeforum.com/showthread.php?t=251917&goto=newpost

jon-d

how do I remove the shifter cables connected to the trans? Do they just pop off and press back on?

jon-d

BTW, I met somebody at work who knows how to rebuild transmissions and said he could rebuild mine for $300 plus parts. he said parts would be about $300 for a rebuild kit and then another hundred for the torque converter. He rebuilt a few other transmissions of people we work with and they all seem real happy with the work. I agree with the AMCO comments and then some.