RecklessWOT
Full Access Member
- Joined
- Feb 20, 2015
- Posts
- 2,548
- Reaction score
- 4,744
- Location
- New Hampshire
- First Name
- Kevin
- Truck Year
- 1987
- Truck Model
- V10 Suburban Silverado
- Engine Size
- 350 TBI
Jack the truck up by the meatball. Put a mark on the driveshaft and spin one of the rear tires all the way around by hand (i've heard two full rotations if you have posi, only one of it's an open diff, but I've never ****** with posi so i don't know for sure). Count how many times the driveshaft rotates while doing so. There's your gear ratio.
If the driveshaft spins almost exactly 3 times, you got 3.08s. 3 3/4 times, you got 3.73s. If it spins a full 4 1/2 times, they're 4.56s, less than that but a little more than 4 they're 4.10s, etc.
Not the most exact science in the world, but pretty damn close if you have absolutely no idea.
If the driveshaft spins almost exactly 3 times, you got 3.08s. 3 3/4 times, you got 3.73s. If it spins a full 4 1/2 times, they're 4.56s, less than that but a little more than 4 they're 4.10s, etc.
Not the most exact science in the world, but pretty damn close if you have absolutely no idea.
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