4L65 trans issue
Thread Starter
Teching In
Joined: Apr 2007
Posts: 38
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From: Kuwait
4L65 trans issue Hello people,This is my last hope since nobody cant tell me whats going on with my tranny.
I have 02' Z28 Camaro that is almost stock (for now, though), the 4L60E transmission was in a perfect working condition and shifts like a caddy, downshifts and up shifts are normal; but whatever I do, it is always impossible to choose the first gear by the trans manual selector, and will skip shift to the second gear whenever I choose the 1st one.
I decided to overhaul and upgrade my tranny to the 4L65 specs just to be prepared for the coming mods which is TFS heads, cam and bolt ons. In addition to the upgrade, I also installed Transgo HD2 and corvette servo which I thought will solve my manual shifting issue, BUT the surprise is..... I still have the same ******* problem
The PCM has been scanned by Tech II, the results show that the 2nd,3rd and 4th gear solinoids are functioning perfectly but we were shocked when we did not found the 1st gear solenoid in the scanner.
Do anyone know where are the solenoids located? are they inside the tranny itself? Do you have any idea why this shitty trany is acting up?
Thanks a lot.
I have 02' Z28 Camaro that is almost stock (for now, though), the 4L60E transmission was in a perfect working condition and shifts like a caddy, downshifts and up shifts are normal; but whatever I do, it is always impossible to choose the first gear by the trans manual selector, and will skip shift to the second gear whenever I choose the 1st one.
I decided to overhaul and upgrade my tranny to the 4L65 specs just to be prepared for the coming mods which is TFS heads, cam and bolt ons. In addition to the upgrade, I also installed Transgo HD2 and corvette servo which I thought will solve my manual shifting issue, BUT the surprise is..... I still have the same ******* problem
The PCM has been scanned by Tech II, the results show that the 2nd,3rd and 4th gear solinoids are functioning perfectly but we were shocked when we did not found the 1st gear solenoid in the scanner.
Do anyone know where are the solenoids located? are they inside the tranny itself? Do you have any idea why this shitty trany is acting up?
Thanks a lot.
Thread Starter
Teching In
Joined: Apr 2007
Posts: 38
Likes: 0
From: Kuwait
it's going to first, put when I put the gear in 1st, the car run in 2nd.
any one can help plz.
There is no 1st gear solenoid there is a 1-2 (A) and a 2-3 (B) but even those names are deceiving. Since in reality heres what happens
A and B on makes first
A off and B on makes second
Both solenoids off make 3rd
A on and B off make 4th
But non of this is related to your problem. Factory the PCM will overide the manaul selector when in first gears and force and upshift to second at some preset rpm and mph. The transgo kit will overide this however its not something I prefer doing , However if after the transgo it still happens you did something wrong when installing the 1-2 shift valve behind solenoid A probably to do with the position of the small check ball and spring.
A and B on makes first
A off and B on makes second
Both solenoids off make 3rd
A on and B off make 4th
But non of this is related to your problem. Factory the PCM will overide the manaul selector when in first gears and force and upshift to second at some preset rpm and mph. The transgo kit will overide this however its not something I prefer doing , However if after the transgo it still happens you did something wrong when installing the 1-2 shift valve behind solenoid A probably to do with the position of the small check ball and spring.
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Thread Starter
Teching In
Joined: Apr 2007
Posts: 38
Likes: 0
From: Kuwait
There is no 1st gear solenoid there is a 1-2 (A) and a 2-3 (B) but even those names are deceiving. Since in reality heres what happens
A and B on makes first
A off and B on makes second
Both solenoids off make 3rd
A on and B off make 4th
But non of this is related to your problem. Factory the PCM will overide the manaul selector when in first gears and force and upshift to second at some preset rpm and mph. The transgo kit will overide this however its not something I prefer doing , However if after the transgo it still happens you did something wrong when installing the 1-2 shift valve behind solenoid A probably to do with the position of the small check ball and spring.
A and B on makes first
A off and B on makes second
Both solenoids off make 3rd
A on and B off make 4th
But non of this is related to your problem. Factory the PCM will overide the manaul selector when in first gears and force and upshift to second at some preset rpm and mph. The transgo kit will overide this however its not something I prefer doing , However if after the transgo it still happens you did something wrong when installing the 1-2 shift valve behind solenoid A probably to do with the position of the small check ball and spring.
forget about the rebuild, what about before installing the transgo, when the trans was stock, the problem was there, even when full throttle and the gear in 1st, it run in 2nd, any idea?
Thats what I was saying its normal for the PCM to overide and allow the 1-2 shift to happen even when in manual low.
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Thread Starter
Teching In
Joined: Apr 2007
Posts: 38
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From: Kuwait
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No its not a sensor. What I am saying is that the trans and pcm were designed by gm to not allow you to hold first beyond a certain mph and rpm. even when the shifter is in manual low .
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