On our work trucks, I know the Duramax is much higher rpm than the older
Cummins. The way the Cummins drives I wouldn't be supprised if it had
the gas tranny as far as top speeds in gears go. And I doubt the Allison
tranny has any different gearing than a gas tranny as far as the Duramax
goes as it can get to 3500 rpm.
Peter Hope wrote:
>
> > Also, I've noticed that in the case of Dodges with Cummins diesels and
> > Fords with Powerstrokes the rear-end gearing options they mention are
> still
> > the standard 3.7 and 4.1. I assume this must mean that the transmission
> > gearing is somehow different with these engines. Does anyone know any
> more?
>
> I would be very interested in this.
> I know that with the older diesel engines they put a higher gear ratio in to
> balance because the power band being lower in the rpm range compared to a
> gasser.
>
> I do know that the Ford can be had with 3.73, 4.1, and 4.3 as a gasser but
> only 3.73 and 4.1 with the diesel. The 7.3 powerstroke uses the same manual
> tranny as the gas engine. I dont know the specs on the auto. The new 6.0
> liter Powerstroke (560ft.lbs of torque baby :) has an entirely new tranny.
> The GM duramax also has a different tranny from the gas drive train, but I
> read this was because of the power output.
> Hmmm, ya know that 6.0 liter power stroke sure does look like it would fit
> into a defender engine bay ;)
>
> Pete
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-- Jim Hall 1966 88" Elephant Chaser http://webs.purplemountain.net/jimfoo/Foospage.htm "You know, I never really damaged my Rover 'till I started wheeling with Jim." Mitch Stockdale _______________________________________________ LRO mailing list LRO@land-rover.team.net http://land-rover.team.net/mailman/listinfo/lro
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