I need to find out how to tell what size rearend I have. It is a 63valiant, I don't know how many different sizes they made or how to tell by looking.
What do I do?
Thank You
crooked6

count number of cover bolts and post back. ron

It is a 10 bolt rearend. If it is stock, what ratio is that?

Then you have a 8 1/4" rear.
Look for a little tag under one of those bolts.
It has the ratio stamped in it, or something else...

I hate to say it, but if it had a tag it is long gone by now. The car is old after all. Anyway, my search continues for this ratio. I need this because I'm am trying to buy the proper speedogear to the tranny. I need rearend ratio and tire diameter, the latter being easier to figure out

jack the rear end up turn the wheel 1 full turn count the number of turns the driveshaft turns. 2 and 3/4 turns 2.73:1 almost 3 turns 2.94:1
if both wheels turn the same direction you have a posi rear end .
you can jack up 1 side and turn the up wheel 2 turns and count shaft turns

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73 swinger holley 5200, 2 1/4" exhaust .030 over new pistons , cam, .010 under crank. stock everything else. 1/4 mile about a week. 0-60 around 15 sec.

If you wanted to change the ratio in your diff, contact "Randy's Ring and Pinion".

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"Ja, Ich fahre ein altes auto."
'78 Volare 225
'67 Charger 318