Join Date: Dec 2010
Location: Southern California
SUNCOAST Allison 5 to 6 speed conversion
I have an 05 DuraMax, and was wondering if anyone is familiar with a company named "SUNCOAST" that manufacturers the above conversion kit for 2001-2005 Allison tranny?
The manufacturer claims a 325rpm drop at 75mph, increasing the MPG by 1-1.5mpg. I tow a 35 foot fifth wheel and currently getting around 13-14mpg.
and was thinking of maybe doing this mod.
It's not cheap at $2148, so I figured I'd better do some more research!!
Thanks in advance..