Standard Differential Ratios? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ratskin · 10-10-2007, 06:42 PM

Can anyone tell me what ratio would be standard in a 68 C-10 Custom w/327 and TH-400? If I counted correctly, I had about 1&5/8 yoke turns to 1 wheel turn. Doubling that, I come up with about 3:23/1. It's on another guy's truck, and I'm looking to buy it for my 61 3/4T for $100. Numbers are unreadable, and he won't let me open the case. No mention on the glovebox lid. Thanks in advance!

**WorkinLonghorn** · 10-10-2007, 07:18 PM

Standard was 3.07-1 which is about what you counted.

ratskin · 10-10-2007, 07:31 PM

Thank you! That should work out to be a fine road gear!

10-10-2007, 06:42 PM	#1
ratskin Registered User Join Date: Oct 2006 Location: Western IL Posts: 358	Standard Differential Ratios? Can anyone tell me what ratio would be standard in a 68 C-10 Custom w/327 and TH-400? If I counted correctly, I had about 1&5/8 yoke turns to 1 wheel turn. Doubling that, I come up with about 3:23/1. It's on another guy's truck, and I'm looking to buy it for my 61 3/4T for $100. Numbers are unreadable, and he won't let me open the case. No mention on the glovebox lid. Thanks in advance!

10-10-2007, 07:18 PM	#2
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: Standard Differential Ratios? Standard was 3.07-1 which is about what you counted. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

10-10-2007, 07:31 PM	#3
ratskin Registered User Join Date: Oct 2006 Location: Western IL Posts: 358	Re: Standard Differential Ratios? Thank you! That should work out to be a fine road gear!



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