2017 Silverado 8speed - hard 1st to 2nd & 2nd to 1st. Jumpy RPMs at light throttle on highway.

RickRock

Newbie
Joined
Oct 3, 2022
Messages
1
Points
1
Make
Chevrolet
Model
Silverado 1500
Year
2017
Miles
60,000
Engine
5.3 V8
I have a 2017 Silverado with the 8 speed transmission. It sometimes slaps from 1st to 2nd gear and also slowing down from 2nd to 1st. I also noticed that the transmission slips? or more like the RPM bounces around 200-500 rpm jumps. I only see it happen when its an 8th gear going 55 mph +. Truck has 60,000 miles. VIN-3GCUKSEC0HG456257
 

grcauto

wrench
Joined
May 29, 2014
Messages
1,252
Points
48
The hard 1/2 shift could be a few things.
The other is the TCC being applied and released. At that speed it's on the line.
 
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