Tranny pinion gear

[dart_man440]

Got a question for the tranny gurus out there, I took the 68 on it maiden voyage and by god, it moves . One thing I did noticed was that the speedo was reading faster than what it should be, even though I don't know how much faster, it is obvious that I was not going that fast. I have a 32 spline pinion gear and unless I'm reading the book wrong I don't know what it should be. I'm running a 727 and 3.23 gears, the tires are 235/60/14 approximately 25 1/2" tall, any ideas? Thank you guys!

 

[Bill Dedman]

http://www.moparts.com/Tech/tech/pages/speedo.html

This chart should give you the info you need.
Good luck!
Bill in Conway, Arkansas

 

[rumblefish360]

I opened up a YEar One catolog. It has more tire listings than Bill's link. But it doesn't have a large list of tires. Just stock ones, er, sizes. There given in letter and metric, 215/70/14 for example.
I don't know there diameter of any tire seen so far.
(Except the G 60/15 which is a 235/60/15 @ 26 inchs. It use's a 32 tooth for 3.23's.)

If you can go to the tire company's web site and find out for sure it's daimeter, there are cal's on line to use.