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Old 05-29-2007, 09:13 PM   #4
tekkdrone
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Re: '98 Regal - Odd Transmission Issue - 4T65E-HD

Quote:
Originally Posted by bnaylor
It is always helpful to post the mileage and when the last tranny service was performed. Mainly when the ATF and screen filter were replaced.

I too hate speculating but it sounds like an internal mechanical problem to me. What does it do if you never put it into overdrive - 4th. Run a test by leaving it in D3 only and see if it ever drops to neutral.
Aye, the mileage is about 135K, I purchased it used recently and was still in the process of taking care of the previous owner's maintenance shortcomings... The trans filter and fluid's last change are a complete mystery though they were due to be done this coming weekend. I'll run the test you suggested also bnaylor, and I'm looking at the internal differences between OD1 and Manual 1 in the unit repair manual's flow diagrams. I've edited my first post to better reflect the conditions encountered.

Thank you for your quick replies

Edit: When starting in manual 2-1st gear then upshifting to manual 3, reaching 3rd and then slowing down results in loss of drive. Bnaylor, I suspect it's going to be internal, I'm just hoping it's on the accumulator side and not the valve body. It doesn't fit the PCS or TCC Apply failure descriptions that I've come accross so one can hope...

Last edited by tekkdrone; 05-29-2007 at 09:44 PM.
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