Thread: Allison 6 Speed GMC 401
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Old April 3rd, 2018, 02:48 AM
tommr tommr is offline
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Default Re: Allison 6 Speed GMC 401
Thought the same thing Bill. Its all upside on the performance end. Early introduction of the 8.0/8.8 were LPG with decent #s. There were federal tax rebates on LPG fuel purchases for fleets. Gasoline versions were better performance. Now you are seeing turbo stuff. CNG is pretty big now as a replacement for diesel fuel. BTW the latest Duramax is pushing 1,000 lb ft of torque.
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