Low gears, high RPM's, and the gas station. Near Portland, Oregon - The 1947 - Present Chevrolet & GMC Truck Message Board Network

longorange68 · 01-31-2008, 12:58 PM

1968 C-10
250-6
SM465

Been awhile since I have posted here, about a year to be exact. I would like to drive my truck a lot more since I got it running again, but all I can seem to get out of it is about 53 mph. I probably could get more speed out of her, but my desire to go faster is quickly trumped by my desire not to blow up the motor. In a perfect world I would go with a Gear Vendors overdrive and not look back. Here in the real world, I am thinking more along the lines of changing out the gear ratio to something a bit taller, like 3.08's.

I did get a quote for this work with a drive in drive out option from Body Armor in Vancouver, WA, which came in around $1700. yeah, not so much...
I was told that I could only go posi with this ratio in a 12 bolt, is this correct?? This is going to be a driver, not a street warrior I would rather not if I didn't really have to.

I need some tips and insight, my grandfather used to be the go to guy for that sort of thing so I never really thought twice about rear ends and trannys. He has since passed, and I parked this thing the day after his funeral. That was 6 years ago. I would like to really enjoy it once again, but I don't have the time to do this particular work, and I would rather not be parted from too much of my cash. Need some advice.

JM

01-31-2008, 12:58 PM	#1
longorange68 Registered User Join Date: Apr 2006 Location: Hockinson, Washington Posts: 115	Low gears, high RPM's, and the gas station. Near Portland, Oregon 1968 C-10 250-6 SM465 Been awhile since I have posted here, about a year to be exact. I would like to drive my truck a lot more since I got it running again, but all I can seem to get out of it is about 53 mph. I probably could get more speed out of her, but my desire to go faster is quickly trumped by my desire not to blow up the motor. In a perfect world I would go with a Gear Vendors overdrive and not look back. Here in the real world, I am thinking more along the lines of changing out the gear ratio to something a bit taller, like 3.08's. I did get a quote for this work with a drive in drive out option from Body Armor in Vancouver, WA, which came in around $1700. yeah, not so much... I was told that I could only go posi with this ratio in a 12 bolt, is this correct?? This is going to be a driver, not a street warrior I would rather not if I didn't really have to. I need some tips and insight, my grandfather used to be the go to guy for that sort of thing so I never really thought twice about rear ends and trannys. He has since passed, and I parked this thing the day after his funeral. That was 6 years ago. I would like to really enjoy it once again, but I don't have the time to do this particular work, and I would rather not be parted from too much of my cash. Need some advice. JM __________________ 1968 Chevrolet C-10, 2WD, Longbox, Vortec 350, 700R4, 3.73 gears Good judgment comes from experience, and experience, well......that comes from bad judgment. 1968 Chevy C-10 "Longshot": Bought used from my Uncle George in 1994 and proceeding to beat the hell out of it for 4 years. Sold it. Bought it back, dumped an ungodly amount of money into it since then.



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