Ilikebikes

Thanks for the help, guys.

I'm glad that the EV4000 and 3000 allisons were posted. I just went to their site and it looks like those trannies are capable of running big power and torque. In all honesty, as much as I miss driving stick shift trannies, I'd rather have an auto in this one. I don't tow, so the extra speed of an auto is nice.

About those 3000 and 4000 series allisons. I went to the allison site and looks as though they are computer controlled. That'd be a huge pain to get all that wiring to work. Are there any older, all mechanical allisons that can handle the power that the 3000 and 4000 series can?

fredw

to bad you could not make a allison 1000 work with your setup, that is what the duramaxes are running now, .... you would need to make up an adapter plate from the housing to the block... that would be fairly simple... the hard part would be getting the tCM to understand proper shift points for tthe 8.3, guys like Westers garage or the EFI program could make this job simplier

Haulin_in_Dixie

But wait till you price an Allison for the heavier torque. The engine torque is the key to which transmission. Just for example, a Roadranger 913 holds 900 ft pds, a 613 or 609 or 610 is 600 ft pounds torque, a 9513 is 950 torque, a 1213 is 1200 torque, and so on. Look at the torque rating for the transmission that you are interested in and then consider the torque of your engine.

v8440

I think an 8.3 would chew up and spit out an allison 1000-hell, a 5.9 probably would. The reason I say a 5.9 would is not that the stock torque output is too much for the allison, but that the cummins only has 6 cylinders instead of 8. That means the power impulses transmitted are more prone to pound the internals of the transmission. The converter can only absorb so much punishment before it comes apart, too. The 8.3 would only be worse because of the increased displacement. Even if the 8.3 had more cylinders, just the torque output alone would probably finish a 1000 off in short order. They are not designed to withstand that kind of environment.

Ilikebikes

I agree that a 1000 wouldn't hold up. What about older all mechanical allisons? Not messing with a computer would simplify things a lot.

tnpete

I take it you never did do the 8.3 swap? As for the Allison 1000 Trans not standing up to a 5.9 Been running one for a few years. And its not a stock engine like the Rams run. Its a Factory 275HP RV engine. Tuned to 350HP and 900 lbs of Torque. And the Allison 1000 handles it fine. Also this is grossing 32,000 lbs. Along with running the fire out of the Cummins 5.9.
And thinking about pulling the 5.9 and installing a 8.3 in its place. Truck weights right at 14000 lbs by its self. And without a trailer. Runs more like a pickup. But when pulling the 32,000 lb gross. Its working hard, so thinking along the lines of the 8.3 This is in a Chevy Kodiak. So theres extra room for the bigger engine.