A little speedo gear help needed please. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1970pelle · 08-23-2016, 10:21 PM

With a the changing around on my 86 C20 I have done. I thought I had it figured out when I ordered the new trans. Well I'm running a good 10 miles an hour fast, at 25 and 35. Then at 45 it spreads out a bit more. I have a 4X2 with a turbo 400, using a 44 tooth gear in a 40/45 housing.
I have here a 40T and a 41T gear, do you think these will help me get closer to my correct goal? I'm running the stock steel 16X7 wheels, and 215/85R16 tires on all four corners. I know more info is needed, just thought someone might know right off hand. Thanks Ken

08-23-2016, 10:21 PM	#1
1970pelle Registered User Join Date: Sep 2007 Location: N.E. Florida Posts: 500	A little speedo gear help needed please. With a the changing around on my 86 C20 I have done. I thought I had it figured out when I ordered the new trans. Well I'm running a good 10 miles an hour fast, at 25 and 35. Then at 45 it spreads out a bit more. I have a 4X2 with a turbo 400, using a 44 tooth gear in a 40/45 housing. I have here a 40T and a 41T gear, do you think these will help me get closer to my correct goal? I'm running the stock steel 16X7 wheels, and 215/85R16 tires on all four corners. I know more info is needed, just thought someone might know right off hand. Thanks Ken __________________ 1985 IROC Z28 190HP TPI 305,700r4,T-tops,rear trac lock, Black on lite gray, 16in Z28 wheels 2007 Lexus ES350 (wifes) 1984 CJ7 with 1995 HO4.0L MPI, 2 1/2 OME YJ Lift “There is no limit to the amount of good you can do if you don't care who gets the credit.” ― Ronald Reagan

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