My 89 CC Dually: Double Wide - The 1947 - Present Chevrolet & GMC Truck Message Board Network

11-10-2015, 09:38 AM

#11

SCOTI

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Join Date: Apr 2001

Location: DALLAS,TX

Posts: 21,919

Re: My 89 CC Dually: Double Wide

Quote:

Originally Posted by BLE 'BURBAN

What's your gear ratio?
My 87 had 4:10's in it and 215/85R16 tires.
I had the rear end gears swapped out to 3:54's from DANA/SPICER & also installed a GEARVENDORS O/D unit in it. Final drive in O.D. is now equal to 2:77 rear end gears.
mileage almost doubled on the highway.
And I still have plenty of towing ability.

235/85-16's (31.7)
TH400
4.10's

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