twintornados Posted March 11, 2021 Share Posted March 11, 2021 5 hours ago, tbone said: Is this the same 8 speed transmission you are talking about? ”General Motors has announced a new Customer Satisfaction Program for certain examples of the 2021 model year Chevy Silverado 1500 and GMC Sierra1500 to replace the eight-speed automatic transmissions in the vehicles.” https://gmauthority.com/blog/2021/03/gm-to-replace-eight-speed-transmissions-in-some-2021-chevy-silverado-gmc-sierra-units/amp/ The GM 8 speed trans is the 8L90 and is built by GM, the ZF 8HP is not related to it in any way. 1 Quote Link to comment Share on other sites More sharing options...
akirby Posted March 11, 2021 Share Posted March 11, 2021 Why are they using 6, 8 and 10 speed trannys? I thought they switched to the new 10 speed like Ford? Quote Link to comment Share on other sites More sharing options...
ice-capades Posted March 11, 2021 Share Posted March 11, 2021 1 hour ago, akirby said: Why are they using 6, 8 and 10 speed trannys? I thought they switched to the new 10 speed like Ford? If I remember correctly, the newer transmissions were developed as a joint development project between GM and Ford with each finalizing their own version to their individual products. 2 Quote Link to comment Share on other sites More sharing options...
twintornados Posted March 11, 2021 Share Posted March 11, 2021 23 minutes ago, ice-capades said: If I remember correctly, the newer transmissions were developed as a joint development project between GM and Ford with each finalizing their own version to their individual products. Quote Link to comment Share on other sites More sharing options...
akirby Posted March 11, 2021 Share Posted March 11, 2021 48 minutes ago, ice-capades said: If I remember correctly, the newer transmissions were developed as a joint development project between GM and Ford with each finalizing their own version to their individual products. But are the 6 and 8 speed the same design as the 10 speed or just older models still in use? I don’t quite understand why you wouldn’t just use the 10 speed on all models. Quote Link to comment Share on other sites More sharing options...
twintornados Posted March 11, 2021 Share Posted March 11, 2021 12 minutes ago, akirby said: But are the 6 and 8 speed the same design as the 10 speed or just older models still in use? I don’t quite understand why you wouldn’t just use the 10 speed on all models. Well, in the case of Ford, they use the 10 speed in F150 and Super Duty, but when you get into Medium Duty, they still use the 6 speed, assuming that there is a diminishing value to move up to the 10 speed in Medium Duty. Quote Link to comment Share on other sites More sharing options...
rmc523 Posted March 11, 2021 Share Posted March 11, 2021 28 minutes ago, twintornados said: Well, in the case of Ford, they use the 10 speed in F150 and Super Duty, but when you get into Medium Duty, they still use the 6 speed, assuming that there is a diminishing value to move up to the 10 speed in Medium Duty. I believe GM uses a combo of the 6,8, and 10 on just the 1500 alone. 2 Quote Link to comment Share on other sites More sharing options...
akirby Posted March 11, 2021 Share Posted March 11, 2021 I don't think this has changed. Quote Link to comment Share on other sites More sharing options...
akirby Posted March 11, 2021 Share Posted March 11, 2021 16 minutes ago, rmc523 said: I believe GM uses a combo of the 6,8, and 10 on just the 1500 alone. Exactly. All on the 1500. Quote Link to comment Share on other sites More sharing options...
jpd80 Posted March 13, 2021 Share Posted March 13, 2021 (edited) The GM 6 and 8 speed autos share no parts with the 10 speed. GM economising with existing 8 speed as a base model. Edited March 13, 2021 by jpd80 Quote Link to comment Share on other sites More sharing options...
silvrsvt Posted March 15, 2021 Share Posted March 15, 2021 On 3/13/2021 at 3:36 AM, jpd80 said: The GM 6 and 8 speed autos share no parts with the 10 speed. GM economising with existing 8 speed as a base model. Why not just standardize on one transmission? Wouldn't that be cheaper overall at the levels of trucks they are making?! Quote Link to comment Share on other sites More sharing options...
Harley Lover Posted March 15, 2021 Share Posted March 15, 2021 1 hour ago, silvrsvt said: Why not just standardize on one transmission? Wouldn't that be cheaper overall at the levels of trucks they are making?! Manufacturing capacity? Unwilling to invest in ICE trannies now that they are so committed to EVs? Quote Link to comment Share on other sites More sharing options...
akirby Posted March 15, 2021 Share Posted March 15, 2021 32 minutes ago, Harley Lover said: Manufacturing capacity? Unwilling to invest in ICE trannies now that they are so committed to EVs? GM being GM? Quote Link to comment Share on other sites More sharing options...
rperez817 Posted March 15, 2021 Author Share Posted March 15, 2021 (edited) On 3/15/2021 at 3:32 PM, Harley Lover said: Manufacturing capacity? Yes sir Harley Lover, it appears to be a capacity issue. GM announced in February that it was expanding its plant in Toledo, Ohio that makes those transmissions. GM Investing $75 Million in Toledo Transmission Plant | 2021-02-09 | ASSEMBLY (assemblymag.com) Edited July 17, 2021 by rperez817 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.