No 4th gear 4l60e
Thread Starter
On The Tree
Joined: Sep 2007
Posts: 151
Likes: 0
From: Horn Lake Ms
No 4th gear 4l60e Ok I have spent over 2 weeks trying to diag. my problem 
and I just fixed it today 
so Im posting this to let others know what i found.
It started out not going into 4th at times and then went to no 4th at all. I had just went through the trans because i broke a input sprag and as soon as i put it back in and test drove is when it started. It keep throwing a p0751 so I then deleted it along with p0756, (p0757) is the same code, because of the 3200 stall will cause these codes to set.
Well codes gone and same thing no 4th gear, I went on to something else and ended up replaceing the solniods, the pressure switch, valve body, and still no 4th gear.
for all you people running the tci 4th gear super servo beaware!!!
I got to looking at it and the pin that it rides on had too much side to side slack the factory one had none, it was about 20 thausands, so i swaped it out and it fixed it.
Sorry for the long post, hope it helps some one
and I just fixed it today so Im posting this to let others know what i found. It started out not going into 4th at times and then went to no 4th at all. I had just went through the trans because i broke a input sprag and as soon as i put it back in and test drove is when it started. It keep throwing a p0751 so I then deleted it along with p0756, (p0757) is the same code, because of the 3200 stall will cause these codes to set.
Well codes gone and same thing no 4th gear, I went on to something else and ended up replaceing the solniods, the pressure switch, valve body, and still no 4th gear.
for all you people running the tci 4th gear super servo beaware!!!
I got to looking at it and the pin that it rides on had too much side to side slack the factory one had none, it was about 20 thausands, so i swaped it out and it fixed it.
Sorry for the long post, hope it helps some one
That will do it I have seen that before with the superior 4th servo also a couple time bore size being off . I have never used the tci though
__________________
Hmm interesting maybe a poor aluminum grade and the hole wore larger over time?
__________________
