WebJul 15, 2024 · 29 Posts. #4 · Jul 8, 2024. They changed the fluid in the 8 speed due to failing tc's. They get a rumble at 2-3 and 3-4 shift. Was dex 6, now dex hp fluid. Should be better on 16+ trucks. 6 speeds had front pump issues but that was like 11s down. Just … WebMar 8, 2024 · Contacts: GM Customer Satisfaction Program number: N212328090. Chevrolet Customer Service: 1-800-222-1020. GMC Customer Service: 1-800-462-8782. Subscribe to GM Authority for more …
6 speed vs 8 GMC Truck Forum
WebSep 28, 2012 · In 2002, they agreed to share design and production of a new 6-speed automatic for front-drive vehicles. The resulting Ford 6F and G.M. 6T70 transmissions, introduced in 2006 and numbering over 8 ... WebDec 4, 2024 · Behind the Cheddar Curtain. Re: GMC Sierra 6 or 8 speed transmission. I believe all the 2500HD are 6 speeds. Only way to get the 8 speed is in the 1500. If using … helita pulsar philippines
8L90 8-Speed GM OEM Transmission GM Powertrain OEM
WebJul 12, 2024 · 2024 GMC Yukon Denali. We have received the following question at [email protected] from Chad S about the new 10-speed automatic transmission that is coming to the 2024 Yukon Denali. GM co ... WebFeb 26, 2024 · There is even a ten-speed available for GM performance cars. Here’s the second-gen breakdown: 5L40-E and 5L50 (2000-2007). A five-speed medium-duty transmission. 6L45 and 6L50 (2006-present). … WebSep 2, 2024 · The 6sp had better low gearing, but that can vary with all trannys. I see the big difference is the trucks ability to hold speed better with an 8,9,10 sp vs a 6sp. Based on my past experience I don't think a truck with more speeds will be any faster up a hill. Better mpgs would be the main beneficiary IMO. helit karteikasten