Calvinator
Newbie
- Joined
- Jun 30, 2012
- Messages
- 19
- Reaction score
- 12
Hi all -
Still working on some gremlins in my new-to-me 1995 Suburban 2500 350TBI OBDI 4L80E w/68k miles.
I get hard shift from Park-Reverse and Reverse-Forward. Shift from 1-2 seems delayed and hard. Shifts from 2-3 are OK. Downshifts are sometimes jerky.
And this does not happen all the time.....30% of the time shifting is nice and smooth and the Sub is a pleasure to drive.
I've been troubleshooting the PCM and sensors. All good here and I have no codes. I also threw $40 at the problem and replaced TPS and IAC with fresh Delphi parts. No luck.
So now I am focusing on the transmission shift solenoids and how they work. There is a speed sensor in there too. Before I get too far, anyone have hard shift problems like I do and it was the shift solenoids ?
THANKS
Still working on some gremlins in my new-to-me 1995 Suburban 2500 350TBI OBDI 4L80E w/68k miles.
I get hard shift from Park-Reverse and Reverse-Forward. Shift from 1-2 seems delayed and hard. Shifts from 2-3 are OK. Downshifts are sometimes jerky.
And this does not happen all the time.....30% of the time shifting is nice and smooth and the Sub is a pleasure to drive.
I've been troubleshooting the PCM and sensors. All good here and I have no codes. I also threw $40 at the problem and replaced TPS and IAC with fresh Delphi parts. No luck.
So now I am focusing on the transmission shift solenoids and how they work. There is a speed sensor in there too. Before I get too far, anyone have hard shift problems like I do and it was the shift solenoids ?
THANKS