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2007 Chevy Uplander Transmission Works on R, 1 and 2, and Doesn't on D and 3


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shah123
New User

May 13, 2016, 1:32 PM

Post #1 of 4 (1173 views)
  post locked   2007 Chevy Uplander Transmission Works on R, 1 and 2, and Doesn't on D and 3  

Hi all,

My 2007 Chevy Uplander with about 88k miles is having a problem. The transmission works on R, but doesn't work on D. It doesn't work on 3 either, but it works on 2 and 1, although it doesn't seem to be normal.

The code I am getting is P0751.

I had occasionally started observing the jerks from time to time while it shifted. But then it stopped all of a sudden while I was stopped at light for a left turn. At that time there were no prior symptoms. In fact it had been working fine for about a week or so with no jerks.

It seems to be related to pressure solenoid. What are my option? The problem is that if I get the solenoid replaced and it doesn't fix the problem I have lost a lot of money for nothing. Is there any way for the tech to check to make sure if the solenoid is the problem when he opens it up? If he finds the solenoid to be fine, then I can think of rebuilding/replacing the transmission while he is at it.

I bought it used so I don't know if the oil was every changed. I haven't.

Any help/suggestions will be appreciated.

Thanks.


gsferraro
Enthusiast

May 13, 2016, 3:37 PM

Post #2 of 4 (1153 views)
  post locked   Re: 2007 Chevy Uplander Transmission Works on R, 1 and 2, and Doesn't on D and 3  

Hello,
Transmission is a 4T65E, The P0751 Code Shift solenoid A stuck off, is a performance code meaning an internal mechanical problem, usually is not the solenoid.Ok, so this does not move in D range or D3 range but reverse is ok. On this trans, the input clutch and sprag are on in foward and reverse, so we can eliminate that. The 1-2 band is on in every drive range meaning if the band was broken(very common) it will not move in any drive range, so thats not it. The only thing i can think of, of what it may be is your low sprag, and when you move the selector down the are clutch packs that may assist so thats why it may move in the lower ranges. Gary


Murphy1969
New User

Aug 27, 2017, 6:41 PM

Post #3 of 4 (628 views)
  post locked   Re: 2007 Chevy Uplander Transmission Works on R, 1 and 2, and Doesn't on D and 3  

Hi,

I have the exact same problem with my Pontiac montana sv6 3.9l. Did you find a solution for the problem. I just want to know if it was an easy fix.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 27, 2017, 7:28 PM

Post #4 of 4 (615 views)
  post locked   Re: 2007 Chevy Uplander Transmission Works on R, 1 and 2, and Doesn't on D and 3  

This thread is a year and a half old. If you need help with something, please start a new question of your own.



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