TAP shift not shifting into 3rd...
04-14-2008, 06:00 PM
#1
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TAP shift not shifting into 3rd... I have an '04 Pontiac GTP with I believe a 4L65-E (HD?)and since the guys on the Pontiac board aren't being very helpful I was hoping someone on here could give me some insight...
The car has TAP shift and it shifts fine from 1-2 and 3-4, but it won't shift from 2-3.
If I'm in 2nd and shift to 3rd, nothing happens. I held 2nd until 55mph with the number "3" on the console until I finally had to shift into 4th.
I just bought the car and its already being a pain in the @$$.
Its also slipping in 2nd from 2-3k.
I've also noticed what feels like shudder at highway speeds on any acceleration.
Will the TAP shift not shift if it senses a problem with that gear?
Any ideas or advice would be much appreciated.
Thanks in advance!
The car has TAP shift and it shifts fine from 1-2 and 3-4, but it won't shift from 2-3.
If I'm in 2nd and shift to 3rd, nothing happens. I held 2nd until 55mph with the number "3" on the console until I finally had to shift into 4th.
I just bought the car and its already being a pain in the @$$.
Its also slipping in 2nd from 2-3k.
I've also noticed what feels like shudder at highway speeds on any acceleration.
Will the TAP shift not shift if it senses a problem with that gear?
Any ideas or advice would be much appreciated.
Thanks in advance!
04-15-2008, 12:02 PM
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FWD is 4t65e. Do you have acess to a scan tool ? Can you see what the adaptive shift values are ? Not uncommon for the 4t65e to lose 3rd gear as the sc3800 is a monster on that transmission.
I have an '04 Pontiac GTP with I believe a 4L65-E (HD?)and since the guys on the Pontiac board aren't being very helpful I was hoping someone on here could give me some insight...
The car has TAP shift and it shifts fine from 1-2 and 3-4, but it won't shift from 2-3.
If I'm in 2nd and shift to 3rd, nothing happens. I held 2nd until 55mph with the number "3" on the console until I finally had to shift into 4th.
I just bought the car and its already being a pain in the @$$.
Its also slipping in 2nd from 2-3k.
I've also noticed what feels like shudder at highway speeds on any acceleration.
Will the TAP shift not shift if it senses a problem with that gear?
Any ideas or advice would be much appreciated.
Thanks in advance!
The car has TAP shift and it shifts fine from 1-2 and 3-4, but it won't shift from 2-3.
If I'm in 2nd and shift to 3rd, nothing happens. I held 2nd until 55mph with the number "3" on the console until I finally had to shift into 4th.
I just bought the car and its already being a pain in the @$$.
Its also slipping in 2nd from 2-3k.
I've also noticed what feels like shudder at highway speeds on any acceleration.
Will the TAP shift not shift if it senses a problem with that gear?
Any ideas or advice would be much appreciated.
Thanks in advance!
04-15-2008, 12:07 PM
#5
We have built quite a few of the 4T65E-HD units and find them to be very responsive to the changes we put in place.
It appears that based on your description the direct clutches (3rd gear) have failed.
If you would like to know about some options give me or John a call. 817-605-3151
g
It appears that based on your description the direct clutches (3rd gear) have failed.
If you would like to know about some options give me or John a call. 817-605-3151
g
