8 speed garbage

jrhoyt84 · July 25, 2017

Well I've finally had enough. My 2017 6.2 8 speed is going in to the local Chevy dealer to see what they can come up with. I already know where this is going to end up, being GM doesn't have a for sure fix for the hard shifting, hunting, and all around garbage that is the 8 speed.

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15 Z71 · July 25, 2017

Well I've finally had enough. My 2017 6.2 8 speed is going in to the local Chevy dealer to see what they can come up with. I already know where this is going to end up, being GM doesn't have a for sure fix for the hard shifting, hunting, and all around garbage that is the 8 speed.

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How many miles on it?

It's Tim · July 25, 2017

So the transmission has failed and the vehicle is inoperable?

MrNasty · July 25, 2017

There is a TCM program update, but I would think a 2017 would have it already. My 8 speed is much better now with the update.

jrhoyt84 · July 25, 2017

How many miles on it?

4500 miles

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jrhoyt84 · July 25, 2017

So the transmission has failed and the vehicle is inoperable?

It has not failed in the sense that the pickup doesn't drive. But as far as being what I would call normal, it is far from it.

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ajanes89 · July 25, 2017

8speed transmissions across the board have sloppy shifting issues including gm, Chrysler, ford, and i guess subaru (dads had 2 with issues). Even the torque converter shake is across the board, just varys on how bad. Custom tune will solve the shifting fyi

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jrhoyt84 · July 25, 2017

8speed transmissions across the board have sloppy shifting issues including gm, Chrysler, ford, and i guess subaru (dads had 2 with issues). Even the torque converter shake is across the board, just varys on how bad. Custom tune will solve the shifting fyi

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I'm a little curious as to how this will effect longevity. I've seen a few come in where I work and even new ones on the lot shift like garbage

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ajanes89 · July 25, 2017

Manufacturers cant make a smooth shifting tune to meet the epa requirements from what im told. There programmed to shift to 6th asap, but when you smack the throttle your generally switching from v4 to v8 And dropping a few gears.

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It's Tim · July 25, 2017

Drive it into the ground, if it ever fails worry about it then.

jrhoyt84 · July 25, 2017

Drive it into the ground, if it ever fails worry about it then.

I've seen what this stuff costs to fix out of pocket... No thanks haha

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FADEC · July 25, 2017

Well I've finally had enough. My 2017 6.2 8 speed is going in to the local Chevy dealer to see what they can come up with. I already know where this is going to end up, being GM doesn't have a for sure fix for the hard shifting, hunting, and all around garbage that is the 8 speed.

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Good luck getting it fixed! And expect a few new door dings when you go to pick your truck back up.

Had mine in many times under warranty. The jerky shifting and highway vibration are unchanged. Just a few more door dings!

jrhoyt84 · July 25, 2017

Good luck getting it fixed! And expect a few new door dings when you go to pick your truck back up.

Had mine in many times under warranty. The jerky shifting and highway vibration are unchanged. Just a few more door dings!

Haha. Perfect

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seamus2154 · July 25, 2017

I had the TC replaced and the stator shaft replacement for the delayed engagement. That included a TCM reprogram and I can honestly tell you it is greatly improved and acceptable. I am certain it is just tuning that GM doesnt focus on. My Mercedes is always in the right gear, never clunks, or gets confused and has 7 gears. I really like the 8 speed for towing and drivability but in town or slower driving it can clunk, or get confused and is annoying. Eventually someone will have a tune for it as that is all it needs.

O_J_Simpson · July 25, 2017

I'm a little curious as to how this will effect longevity. I've seen a few come in where I work and even new ones on the lot shift like garbage

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In response to your concern GM increased the transmission warranty from 100,000 miles to 60,000 miles in a show of product confidence.