Kylebg94
OBS Enthusiast
Ok, so I have a 95 5.7 that just had the service engine soon light come on and it started shifting a little harsh. Any idea what could be causing this?
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Ok so what upshifts are harsh? All of them or just 1-2 or just 2-3 or just 3-4 or some combination of those? Also, what transmission? 4L60E or 4L80E?Ok, so I have a 95 5.7 that just had the service engine soon light come on and it started shifting a little harsh. Any idea what could be causing this?
Please Quote my post like this if you'd like me to respond as i dont get alerts and just happened to see a new reply here.I was on my way to work. And it just started randomly right before I pulled in to the parking lot. It seemed to be just the Lower gears shifting up only.
So I drove the truck home. It didn't jerk like it did at all. Now I will say the shifts between 1st, 2nd and third are firm, not harsh though. And the service engine light was not on when I cranked the truck back up oddly enough. I ran the truck kind of hard from a stop twice to see how the trans shifted. I reved it to around 3k rpm. While the shifts were still tiny bit firm. Particularly from 1st to 3rd. They were not slamming you in your seat. That's about how hard it shifted earlier today.Please Quote my post like this if you'd like me to respond as i dont get alerts and just happened to see a new reply here.
Scan the PCM and post the code(s) stored. Harsh 1-2 shift, which is what it sounds like you're describing, is usually valve body (tcc regulator valve) or broken accumulator piston spring in the 1-2 acc housing.