RE: RE: Slipping drive train on a '97 2WD

From: Tom Coulter (
Date: Thu Jan 31 2013 - 11:53:26 EST

Thanks Josh.

I'm guessing the output shaft seal is OK, but I'll have to check it. Duly

You just reminded me of my 3rd question:
I was told by a reputable tranny mechanic that Chrysler is notorious for
being GOOD about sending P-codes to the dashboard (Check Engine) when the
slippage gets to be to much. He explained that there's a sensor in the
tranny that simultaneously monitors the input and output RPM and if/when the
difference exceeds some amount, a code is triggered

Kinda like my Question #1 (never saw any fluid on the ground), I never saw
any P-codes.

-----Original Message-----
[] On Behalf Of Josh Battles
Sent: Thursday, January 31, 2013 11:43 AM
Subject: Re: DML: RE: Slipping drive train on a '97 2WD

On Jan 31, 2013 10:34 AM, "Tom Coulter" <> wrote:
> Now my questions:
> 1) During the time I noted the slippage, I saw no red fluid on the asphalt
> driveway or anywhere else. Moreover, when I checked the fluid, I noted
> the pan and plug head were dry. So where did the fluid go?

How's the output shaft seal?

> 2) The mileage is now 79300, which means that the ATF was changed about
> miles ago. The slippage gradually occurred over the past 2000 miles or so
> (just a guess). With all this in mind, did I cause irreversible harm to my
> transmission? How bad was this? Or is the 42RE resilient & forgiving?
> have read that the 42RE is "Heavy Duty".)

I went through a few 42RE units, they're decidedly not heavy duty. If you
did damage you'll notice that it doesn't like to shift into overdrive while
on the throttle. The OD unit is last in line to get fluid and has the
smallest passageways so they clog with metal first. The last time my trans
was built, they upgraded lots of parts inside and enlarged the fluid paths
to/from the OD unit. I got 80k out of it without issues, the first 3
transes only lasted 10-12k each.


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