Tranny Not shifting

[TowTrac]

I had the valve body done 5 years ago at about 100K. AAMCO took good care of me. I beat that VB up towing and hauling and I never had a problem until I hit 200K.



Now I have trouble shifting out of first and second gear when In "d".

I can column shift (1,2,D) and it works good if I take 2nd up to 45mph and shift into "D"



Everything works fine if I turn the OD off and drive in "D"



My question is what is wrong with my tranny. I don't want to spend $2K on a rebuild if I don't need it. I don't think It needs a rebuild because everything technically is shifting fine when the OD is off. I drove it for 5 hours and about 75 miles and never once had an tranny flare/slip or anything when I had the OD off.

I took it to two tranny shops and they all want $2K plus to rebuild or just look at it.

I really think it could be the shift selinoids or a vacuum line or something.

If anyone has any other suggestions or advice I'm all EARS.



Thanks John



2004 V6 4x4 auto xlt 200,141 MILES !!!:haveabeer:

 

[scott degroot]

If that's all that AAMCO did was put a valve body in it then you have gotten your use out of that trans.



Do you have overdrive and do you you have torque converter lockup?

 

[Art Garcia]

I have a post with 20 replies that might help you out. It's about four down that reads UPDATE: tranny slipping

 

[Rodney Leary]

My ST is around 110k. I had two instances of the OD light blinking in the past year, they went away after restarting. Within the last month I have started having a flare between 2nd and 3rd. I tried Lucas Transmission fix and it got instantly worse... time for me to drop at a shop to get a pro to look at it.



Im not interested in a rebuild on this truck and it might get sold below value to someone willing to have the work done.

 

[TowTrac]

thanks I will check out that post.

AAMCO did pull a few codes, but off the top of my head I don't remember, I wrote them down on the receipt.



I do have overdrive still. I will probably rebuild it anyway. but I'm trying to make it last as long as I can.

 

[Art Garcia]

Rodney- if I were you I'd get that tranny looked at Amd serviced asap. My first OD flashing like was at 120k. I simply ignored it and over time I could barely feel the slipping going on. Until 180k the OD light flashed again Amd it immediately started slipping bad.



TT- a big common issue is this valve body. As of right now, what might have cause my slipping was this o ring on the tranny filter that was missing a big chunk. I got the shop to do a tranny flush with new filter and o ring and AT oil and they said the computer didn't give any codes after that. So hopefully it runs well when I pick it up tomorrow.