Toby Kordenbrock Posted August 23, 2020 Posted August 23, 2020 2013 GMC Sierra 1500 denali 6.2. Need help with jumpy going into 5th and 6th gear. 102,000 miles
CamGTP Posted August 24, 2020 Posted August 24, 2020 That's pretty tough for us to help on without driving the truck or being able to watch it happen. Possible it's an internal issue with the clutches in the transmission or if it's the torque converter acting up. Torque converter failures can happen on these 6 speeds.
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