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Unread 02-07-2006, 12:36 AM   #1
Dopalmer
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Transmission issues after rebuild....

I recently had my trans rebuilt back in october and since ive put about 4000 miles on it. I had some problems with the truck when i first got it back. When you left it parked for an hour or so and you went to drive it, it would accelerate when accelerating slowly it would go from first to second then jump back to first. I took it back and he looked at it and said that he adjusted some things like the shift points. Ive driven it ever since without much issue accept for a few things.

1. When ice cold, and only when driven for the first time after a 12 hr period or more, the trans is kinda sluggish and slips a small bit from 1st to 2nd gear. Thing is I havent taken it back because its hard to really notice it beacuse of it only happening one time only when you start it early in the mornings.

2. I always have to back out of my parking spot on said cold mornings, and after i go from reverse to drive, it drives foward for like 2-3 feet then it stops for a moment like something is binding (almost like a u-joint but i have a feeling its trans related because it only happens on the cold morning starts. Also it only does this when im reversing then going to drive. If i like back in to my parking spot so that i only go from park to Drive and pull out it doesnt do anything like this.

Now, Ive checked the fluid and it is full, actually its a bit over the full mark, the color of the fluid is nice and red not burnt or orange at all. After the car warms up, (litterally 1-3 shifts through the gears, like stoping at two close lights together) the vehicle shifts flawlessly with firm shifts. It hangs onto gears more than it used to like first to second dis at 2400, second to third will not occur until 2450-2500 unless i let off the gas then it shifts into third.

Can anyone help me? These problems are hard to explain to the trans shop because they are all cold start issues and dont always happen. My main concern is that the trans has been rebuilt well and isnt gunna take a dump on me like 20,000 miles or so.

sorry for the long post i just want to be thurough.

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Unread 02-07-2006, 12:39 AM   #2
Dopalmer
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I also forgot to give the specs

1993 4.0 i6 with the 42re trans. Also i was told when it was rebuilt a mild shift kit was installed to improve performance and drivability.
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Unread 02-07-2006, 12:46 AM   #3
Woody
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I would go with the shift kit. The reason it's slow when it's cold is that Chrysler with it's divine intelligence ran the fluid pressure in the 4x series trannys much lower than they should have. They also made it so that the transmission pump only works when in neutral or in gear. Which is part of the reason why you have to get the tranny good and warm prior to checking the fluid level. Fluid doesn't start going back into the Torque converter (it drains when it sits) until the pump is running. I bet if you let it idle for a minute in neutral prior to moving, it wouldn't do this. A decent shift kit remedy's these issues. I would've put one on mine, but I had 185K original miles on my untouched tranny and it would've needed a rebuild to handle it. Also the AX-15 was much cheaper than rebuilding and installing a shift kit.

I've thrown a shift kit into a Chevy Turbo 350 once and it made it shift a lot better. I recommend it to anyone who plans on keeping their vehicle for the long haul.
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Unread 02-07-2006, 12:55 AM   #4
Dopalmer
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I was told that it had one installed when i paid for the rebuild. Airmanwoody you seem to know alot about these transmissions. Do these other syptoms seem fairly normal. Its worst when its coldest. And cold always does bring the worst out in a trans or car. Have you ever heard of the other things i mentioned?


Like i said after its been ran for less than 2-3 min it runs top notch. I live in the Upper Penninsula in Michigan, and We have normal 15 degree days.
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Unread 02-07-2006, 12:56 AM   #5
Dopalmer
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Im most worried about it getting any worse. Im wondering even if i took it back what they could do.
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Unread 02-07-2006, 01:02 AM   #6
Woody
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I had all the symtoms you have prior to swapping out my 42RE when it had 185K on it.

Ask them what shift kit they installed, there are a few good ones out there that should eliminate this issue.

Because of your experiences, I bet they didn't actually put one in. They may have adjusted the bands so that it shifts better, but a good shift kit ($75 if I remember correctly) would've taken care of the pump issue which is what is causing the problems when it's cold.

I was getting these same problems when it was 60 degrees on an Arizona morning, or even 120 degrees in a Arizona afternoon.

I'm a professional aviation mechanic and have been for the last 12 years. Auto mantenance is my hobby and I've worked at several Junkyards during this span of time. (I quit the junkyard thing about five years ago when I got married.) I still tinker a lot and have quite a bit of experience playing with Chevy transmissions, but thanks to Chrysler, I got to know the 42RE pretty well. What kills me is that a good friend had a 89 XJ and lifted it and drove it over 275K prior to killing it on a rock. He had the original, unmolested AW-4 in it and it worked great. I wish they would've left that in the ZJ's. At least Chevy went to tougher trannys as they went through the years, Chrysler went backwards through the 90's.
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Unread 02-07-2006, 10:34 AM   #7
Dopalmer
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any other opinions guys?
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Unread 02-07-2006, 11:02 AM   #8
rowdy1
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Quote:
Originally Posted by Dopalmer
any other opinions guys?
I agree with the cold weather issue on the delayed shifts. There's definitely a problem if the tranny is stopping the vehicle dead in its tracks though. I'd take the sucker back.
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Unread 02-07-2006, 05:17 PM   #9
Dopalmer
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in to be looked at so hopefully they dont jerk me around

ill keep you guys posted.
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Unread 02-10-2006, 10:16 AM   #10
jeep946
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i also have the 42re trans. i had it rebuilt with a shift kit help some but your main problum is it the computer programing. jeep has come up with a new updated verson. you need to take your truck to the dealer and have the computer flashed. this will take care of all your troubles. will run about 82.00$
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