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Re: Diesel Dart Cummins
[Re: DieselDart73]
#1716549
12/31/14 07:08 PM
12/31/14 07:08 PM
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Joined: Sep 2008
Posts: 656
Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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That 47 will never live. You can build it with the 48 5 -gear planetary's, but the weak link will always be the overdrive clutch/spring. You can update to a 48 overdrive, but by then, you could just use a 48...and the 48 won't live either with that torque. You've got options, but none are cheap.
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Diesel Dart Cummins
[Re: DieselDart73]
#1716551
12/31/14 08:53 PM
12/31/14 08:53 PM
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Joined: Sep 2008
Posts: 656
Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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Quote:
I don't think I'll ever need the overdrive the gearing and tire size will keep me out of it... But any pointers or tricks to making it live longer will be appreciated. Can I keep the 47 out of OD with a manual Valve body? Thanks
Unfortunately no. The OD units clutch is used in direct and OD. You'll still pull through the clutch with OD off.
If OD is not needed, you can just build a 727, or dare say I, a Turbo 400. The adapter on the back of the engine is available in Chevy, Ford, and Mopar. I'd say a Powerglide is out because your going to need 3 gears in the quarter with the rpm band of the engine. If your going to have one built, pick something that has gear ratios available for it. You can tailor the gear split to keep the diesel in it's narrow power band. Probably be best to check in with the Cummins truck drag race guys. They will be a lot more helpful on recommending a transmission and know what will live. I only know what won't!!
BTW, I think your going to want a lot more rear gear.
Last edited by CJD AUTOMOTIVE; 12/31/14 08:55 PM.
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Diesel Dart Cummins
[Re: CJD AUTOMOTIVE]
#1716552
12/31/14 10:05 PM
12/31/14 10:05 PM
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Joined: Dec 2014
Posts: 91
Eastern Pa
DieselDart73
OP
member
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OP
member
Joined: Dec 2014
Posts: 91
Eastern Pa
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Quote:
Quote:
I don't think I'll ever need the overdrive the gearing and tire size will keep me out of it... But any pointers or tricks to making it live longer will be appreciated. Can I keep the 47 out of OD with a manual Valve body? Thanks
Unfortunately no. The OD units clutch is used in direct and OD. You'll still pull through the clutch with OD off.
If OD is not needed, you can just build a 727, or dare say I, a Turbo 400. The adapter on the back of the engine is available in Chevy, Ford, and Mopar. I'd say a Powerglide is out because your going to need 3 gears in the quarter with the rpm band of the engine. If your going to have one built, pick something that has gear ratios available for it. You can tailor the gear split to keep the diesel in it's narrow power band. Probably be best to check in with the Cummins truck drag race guys. They will be a lot more helpful on recommending a transmission and know what will live. I only know what won't!!
BTW, I think your going to want a lot more rear gear.
Thanks for the info. We already have my girls truck with a powerglide adapted cummins. Fully built 2.70 gears 33x18.50s runs [Email]10.87@123mph[/Email] footbrake picks frontend off ground. 
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