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Old 12-08-2016, 01:56 AM   #26
WorkinLonghorn
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Re: Rear Gear Change
Quote:
Originally Posted by demian5 View Post
Dude were you running 44" tires or a 700r4?

I have 31" tires on mine with a "3.07" and a turbo 350 and it spins 2600 at 65 MPH. With the 3.73 it had before, it was 3400 to keep up with traffic.

Its not a dog with 3.07 and it hauls ass with a stock motor. Yes it was peppier with the 3.73 but now its got some long legs and can cruise comfortably.
Dude, Go to this site and enter the ratio (3.07) tire size (33) and speed (60).

I actually did the math without this site 25 years ago and got the same answer; 1875

https://www.ringpinion.com/calculators/Calc_RPM.aspx
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'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.
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Old 12-08-2016, 07:01 AM   #27
TwoFiftyShifter
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Re: Rear Gear Change
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Originally Posted by 1972RedNeck View Post
Speed, gear ratio, and tire size.

I meant while driving...
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Old 12-08-2016, 10:02 AM   #28
Malamute
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Re: Rear Gear Change
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