Build sheet location

[82TPICamino]

I have an 82 Elcamino and im trying to find out if anyone might know where the build sheet would be located in the truck. As well as where I can find the gear ratio for the rear end with out pulling the cover and counting the teeth on the ring and pinion.

[78elky]

I have a 78 el camino and I found the build sheets behind the upper part of the door panels, there was 1 in each. They may also be found under the seat, or on top of the gas tank. As for the rear end gear ratio, I just went down to my local chevy dealer and gave him my VIN number and he looked up the information and gave it to me.

78 elky

[a1supersport]

A quick way to find out the gear ratio in the rearend is fairly simple. Jack one rear tire off the ground, find something on the tire/wheel to use as a starting point (like the tire valve), face the valve straight down, or up, whichever you prefer...so long as you know where you started from, and spin the tire 2 complete revolutions. While you're spinning the tire, watch how many times the driveshaft spins (It might be a good idea to mark the driveshaft with chalk or something). Most likely your ElCamino will have a 2.73 to 1 ratio. If so the driveshaft will spin almost 2 and 3/4 turns (2.75). I had a '78 and an '84, both with auto transmissions, and both had that ratio. Yours also may have a 3.08 to 1 (slightly more than 3 spins of the driveshaft). Another possible ratio would be 3.42 (almost 3 and 1/2 turns). But if yours is an original automatic, it'll most likely be 2.73. Good Luck

[jim dillard]

Pulling the cover & changing the oil isn't a bad idea anyhow, The ratio numbers are stamped inside,, it gives the ring/pinion count so you have to divide, as a1 says they are disappointingly "highway" ratios for the most part

[racindaelky78]

if you have the hood insulation still,there is one under there, one under the seat and one under the"cubby hole" carpeting, i found the last two exactly there and the original owner(my father) laminated the one underhood.