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02-02-2009, 07:08 PM | #1 | |
AF Newbie
Join Date: Feb 2009
Location: Milwaukee, Wisconsin
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Wierd 4T60E Trans Shift Prob 97 Bonne
My 97 Pont Bonne with a 4T60E has started to slip between 1-2, 2-3, and
3-2 shifts. The engine will rev for a moment durring shifting and then it will catch itself. It also is upshifting a little to quick 3rd gear at about 22 mph, 4th gear at about 32mph. The wierd part is it only happens when the gear shift valve is in D4(overdrive); if I put the gear shift valve in D3; nothing slips and it shifts perfectly(except it stops at 3rd gear as designed). I have a temporary work around; I start accelerating from a stop in D3 and then when I get to 50MPH shift to D4 and it goes in to overdrive fine. I have: 1. Installed a new vacuum modulator 2. Tested for proper vacuum 3. Tested speed sensor 4. Changed fluid and filter. 5. Cleaned all electrical connections 6. Checked computer codes (none) When I changed the fluid, it was clear/red with no smell, and the pan had hardly any clutch dust. Looked great! I am stumped, what do you guys think? Thanks in Advance, -Pete |
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02-03-2009, 02:12 PM | #2 | |
A990 racer
Join Date: Mar 2002
Location: Chestertown, New York
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Re: Wierd 4T60E Trans Shift Prob 97 Bonne
I would suggest a full scan with a trans specific scanner to look at slippage and gear errors as well as solenoid functions. The tps may be skewed also, but less likely.
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