8 Speed Jerk Into Reverse?

adamj2121 · September 6, 2018

2 minutes ago, DenisTheMenace said:

Keep us posted please! I'm curious to see what a new Torque Converter does for your truck!

Will do! I had a valve body replaced a few months ago and no noticeable improvement after that. The truck has a major delay when shifting from first to second, but it is highly intermittent. I can't replicate the condition consistently, so it makes diagnosing it hard. The dealership is pretty much throwing any part that they can get approved by GM at it.

Jaychevy81 · September 7, 2018

Will do! I had a valve body replaced a few months ago and no noticeable improvement after that. The truck has a major delay when shifting from first to second, but it is highly intermittent. I can't replicate the condition consistently, so it makes diagnosing it hard. The dealership is pretty much throwing any part that they can get approved by GM at it.

Same with my 18 8 speed some days it shifts great others clunky delay between gears and it holds gears as well. If your on the gas and just let off it’s like a manual trans it will stay at that rpm not up shift. Some times it will shift depends on the mood it’s in lol.

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adamj2121 · September 14, 2018

The new torque converter is scheduled to be installed Wednesday, the local dealership has been pretty backed up. We will see what it does for my transmission issues. I passed a semi on a two-lane road this morning on the way to work and the trans had a massive delay on the upshift when accelerating around it, that was a bit of a butt clenching experience. haha

I don't see a torque converter fixing that, but I am hoping they will find something else wrong when they replace it. If this temperamental transmission would just work consistently my truck would be near flawless.

adamj2121 · September 25, 2018

I just got my truck back from having the torque converter replaced this morning. So far I am very impressed. The replacement has effected things I didn't expect to be effected. The rough idle I had before is now almost completely gone and shifting around town seems much smoother than before. It has been raining a lot lately in Ohio so I haven't been able to push it as hard as I normally would to be able to see if the shifting issue from 2-3 under hard acceleration has been fixed. I am very pleased with the results of the torque converter replacement so far. I found a bulletin online and used that to get the converter replaced. It was a bulletin that indicated what TCC slip should be when cruising and my TCC slip was not in those parameters so the dealership replaced it, I'll see if I can find that bulletin again and post it here.