Trying to find my rear end ratio. The axle stamping has been hammered out I think. (Between the brackets of the radius rod there is a row of hand tooled indentions like this ////////////////// with an E underneath. I couldn't find any other stampings, but there is alot of crud on there...

PO stated he thought it was changed to 4:10's at some point...maybe it was a practice to hammer out the stamping if the ratio was changed? Anyone heard of that?

Both tires in the air...I rotated one tire (the other one remained stationary)...I did two rotations of the TIRE and counted 3.5 rotations of the DRIVESHAFT.

Non-posi 3:55?

Thanks,
Scott

That would be a good guess.

if a tire/wheel is bolted to the axle and you rotate the tire 1 full turn, the axle will also make 1 full turn. did you mean to say the pinion yoke?

if a tire/wheel is bolted to the axle and you rotate the tire 1 full turn, the axle will also make 1 full turn. did you mean to say the pinion yoke?
HA...yes, I meant driveshaft...edit'd my post above.

Also, I did a little looking around the site, and I think the E signifies that it was originally an Eaton posi? Guess I'm gonna have to open it to see what's really inside...with both tires in the air, if I spin one wheel by hand, the other is stationary...unless I spin it fast, then the other starts to move in opposite direction...

I don't know what the E stands for unless its the second letter in the axle code. All factory 8.2 posi rear ends had Eaton made posi's. You can't figure out the gear ratio on non posi units, even if you spin both wheels at the same rate there is still some spider gear play. The only way to know for certain is to take the cover off and count the gears on the ring and pinion. Then compare it to various gear ratios until the ring and pinion gears match.

You can't figure out the gear ratio on non posi units, even if you spin both wheels at the same rate there is still some spider gear play.

You don't spin both wheels at the same rate, you hold one steady and rotate the other one two full revolutions. Whatever small error is introduced by play in the gears will be more than overcome by the spread between the ratios. You won't be confusing a 3.36 with a 3.55. If you want to increase the accuracy of your test by a factor of ten, rotate the wheel twenty times and divide the revolutions of the yoke by ten.