Trans. slipping ONLY in OD?

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May 10, 2004 | 07:57 AM

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From: Marysville, WA

Trans. slipping ONLY in OD?

I've been noticing the transmission slipping lately in my '98 with ~72k miles, but it only does it in overdrive if I give it enough gas to accelerate but NOT unlock the converter, and it doesn't do it all the time either. It seems to get a lot worse if I am doing a lot of stop-and-go driving in traffic, and the other 3 gears seem to be fine.

I bought the car with a Vig 3200 in it, but there was no aftermarket trans. cooler installed and the fluid needs to be changed. I have a B&M 24k trans. cooler and TransGo on the way , and I will be flushing the whole system myself and changing the filter plus installing the parts hopefully this weekend.

Is there anything else I should do to try to correct this slippage myself? Do I need to be concerned about the life of the transmission? I'm always very careful not to stay in the gas if the transmission starts to slip, and I also try to drive so that I'm not under power when the converter tries to lock up in 4th. Thanks for the advice!

May 10, 2004 | 08:08 AM

jimmyblue

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From: East Central Florida

Mine slips but it's the TCC (converter lockup
clutch), not the trans itself. TCC is a second
PWM down-regulation in pressure and the PCM
*****-foots it for smoothness and economy.
The trans temp plays strongly into the main PWM
line pressure, which the TCC takes only a piece
of.

May 10, 2004 | 09:12 AM

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From: Marysville, WA

So do you think that the fresh fluid and cooler might help take care of this? I'm hoping it does, I can't imagine that a trans. rebuild comes cheap.

May 13, 2004 | 01:54 PM

01Z0H6

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From: Hideaway Tx

I don't think so...
I too have this problem with mine & it only happens in OD @ speeds around 65-68 mph.
I have 143K on my car... Only happens in OD.
I change my fluids religiously, original tranny and all.

I also have the Trans cooler/ temp guage. My care "rarely" gets over 150-160 deg even in the TX heat.

This "should" ease your mind..

May 13, 2004 | 06:08 PM

LS1 Sounds

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From: Marysville, WA

Quote:

Originally Posted by PewterY2KZ28

Has your car always done this? Or is it something that started happening after a certain number of miles? Thanks.

May 13, 2004 | 08:52 PM

01Z0H6

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From: Hideaway Tx

It began when i had my Yank installed. I also had it Custom tuned.
LS1 Edit etc....

It's not a problem, really....

Enjoy!

May 13, 2004 | 11:51 PM

gymratt

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From: Brew City, WI

Quote:

Originally Posted by PewterY2KZ28

I have 70k on my 99, and it just started doing the 65-68mph OD slip every now and then when I'm on the interstate. Some days it does it, other days it doesn't.