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ILIKEMOPAR
 
  Transmission Problem - Slipping When Cold - Posted: 07-14-2009, 10:51 AM
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Post #1

I have a tranny problem with my son's 1999 4X4 5.2L auto transmission and 120,000 miles it.

When the engine (and tranny) are cold, the tranny slips when you first take off. It will not shift from 1st to 2nd gear and the rpms go to about 3200 rpms. However, after you drive for the first 2 - 3 minutes, then, it shifts good from first to 2nd gear but then appears to slip when trying to shift to 3rd gear (drive). When the engine is at normal operating temperature, the transmission shifts normally. The symptoms appears to be low fluid but the fluid level is good. So I'm stumped on this one and I have very limited knowledge with transmissions.

Before I go to a tranny shop, I am hoping some experts in this forum can provide some advice as to what to check before I spend $$$ at a tranny shop.

Here's what I've done to try to fix the problem:

I have changed the fluid and filter and checked the fluid level several times and the fluid level is in the safe range on the dip stick. Yet, we still have this slipping problem. Also, about 6 months ago, I changed a sensor (speed sensor?) on the back side of the transmission.


Is there another sensor I should replace?

Thanks.
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2004 Durango 4X4 LTD 5.7L[/b]
99,000 miles and running strong
-K&N drop-in filter
2004 Neon SXT 2.0L[/b]
125,000 miles and running strong
-K&N drop-in filter
1996 Ram 5.2L 1500 sold
1999 Durango 4X4 5.2L sold

Last edited by ILIKEMOPAR : 07-15-2009 at 06:10 AM. Reason: added specific details to the problem since I didn't receive any replies
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Silent One
 
  Bands or seals... - Posted: 08-22-2009, 11:17 AM
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Post #2

When is the last time the bands have been adjusted? If this has been done recently (and correctly) and *assuming* the bands are still in good shape with the TV cable also being in proper adjustment, then my estimate is that the problem is simply the age of the internal seals which become brittle over time. This allows fluid "leakage" and reduced fluid pressures affecting shift quality. When the trans is at full op temp, the seals will expand reducing these effects. I have the same problem on my '98 46re - cold 1-2 shift in the morning is slow and almost undetectable. Once I get out to the main highway and temps have come up a bit, then the normal, crisp 1-2 shift returns. I have almost 115k and just recognize that the day is coming for a rebuild.
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NewImage
 
 Posted: 09-04-2009, 03:27 PM
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Post #3

Same thing with my 5-45rfe transmission but it has 164,400 on the clock.
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