Chevy/GMC Truck and Duramax Turbo Diesel Forum Discussion of General Topics related to All Chevy and GMC Trucks as well as the Diesels in them

allison

Old Mar 29, 2009 | 09:44 PM
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anyone know if the six speed allison bolts up the same as the five speed allison?
 
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Old Mar 29, 2009 | 10:14 PM
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yes they are essentially the same trans with valve body changes and different tuning
 
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Old Mar 29, 2009 | 10:25 PM
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just different vb, torque converter, wiring and tcm with the 6 speed trans.

bolt patteren the same
 
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Old Mar 31, 2009 | 09:17 AM
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Does that mean you could turn a 5 speed into a 6 speed?
 
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Old Mar 31, 2009 | 12:18 PM
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Originally Posted by K50
Does that mean you could turn a 5 speed into a 6 speed?

yes
 
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Old Mar 31, 2009 | 01:35 PM
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SWEEEET.
If I come across a wreck, I might have to pinch some parts.
 
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Old Mar 31, 2009 | 01:55 PM
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you can also get a kit from Suncoast but its expensive
 
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Old Aug 23, 2009 | 03:30 PM
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no...if you want to make a 5-speed into a 6-speed you HAVE to get the suncoast kit...

a factory 6-speed TCM will not work with an 01-05 duramax in any way.

The only way to get 6-speeds in an 01-05 dmax is to get the suncoast stol-I mean custom TCM.

ben
 
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