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View Full Version : Allison Transmission ratios

Tim James
07-14-2006, 09:38 AM
What are the individual gear ratios for the Allison 5-speed and 6-speed transmissions?

Thanks
Chuggernaut
07-14-2006, 10:00 AM
http://media.gm.com/us/powertrain/en/product_services/Spec%20Sheets/Transmissions/2006%20Automatics/06%20Allison%201000%20Series_MW7%20GMT800.pdf

From what I understand, the only difference is the addition of 6th gear. 1-5 are the same.
Tim James
07-14-2006, 10:43 AM
Hmm that's a pretty flat 6th gear, guess it's best tied to a 4.10 rear than a 3.73. Thanks for the info.
The MercuryMan
07-14-2006, 05:57 PM
06 3/4 ton didnt even have a 4.10 option 3.73 only
dozerboy
07-14-2006, 06:32 PM
My 06 will hold 6th on every mountain out here I have been on 8%+, but I haven't towed yet I have heard it still does quite well loaded. No Damx has ever came with 4:10 no need unless you have a large lift.
Tim James
07-14-2006, 11:40 PM
My 06 will hold 6th on every mountain out here I have been on 8%+, but I haven't towed yet I have heard it still does quite well loaded. No Damx has ever came with 4:10 no need unless you have a large lift.

Yeah, there'd be so much torque you wouldn't need the gears.
What kind of rpm do you turn at 60mph in top gear in that thing?
dozerboy
07-15-2006, 07:44 PM
IIRC 1500-1600RPMs