| GMC’s transmission [message #360310] |
Thu, 26 November 2020 14:56  |
tgeiger
Messages: 518
Registered: February 2006
Location: kansas city
Karma:
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Happy Thanksgiving all! Hope all is well for our GMC community. While the bird is cooking was think of what task I can get done this weekend on mine. Been doing some researching and ran across a posting outside the GMC forum pertaining to the 454 engine. That pre-1990 454 trucks had horrible gas mileage because of a lack of a overdrive. It just brought to mind our transmission. Is it impossible to create the adaptor plates to mod our transmission to a Allison 6 speed or is this down right crazy talk? I get to ask these kind of questions because I know nothing of transmissions. Anyhow I’m sure there are good reasons not to, just curious of what they are?
Thanks,
TG
Tom Geiger
76 Eleganza II
KCMO
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