Finding axle ratio on "78"
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,342
Likes: 2
From: Dayton Area Ohio
St. Jude Donor '08
Finding axle ratio on "78"
I'm trying to find out my axle ratio and I know from what I'm reading the markings are located on the bottom surface of the carrier at the cover mounting flange. My question just where exactly am I looking? From the back drivers side passenger side how high do I have to have the car to see it, do I have to remove anything to see it?
I looked today but I wasn't real sure exactly where to find it. HELP!
:cheers:
I looked today but I wasn't real sure exactly where to find it. HELP!
:cheers:
Instructor
Joined: Nov 2002
Posts: 157
Likes: 0
From: Greenbush WI
Re: Finding axle ratio on "78" (guppie)
Forget numbers........those gears could have been changed. Here's what you do. Raise up the car and put at least the rear on stands. Put a chaulk mark on the drive shaft and one on one rear tire. Now rotate the tire one revolution and count how many revolutions of the drive shaft. Take a guess at the % of the partial rotation the last time the drive shaft goes around. If it comes out to about 3-3/4 turns, you've probably 3.73's. Almost 3 turns you probaly have 2.92(?)'s or such. Have a Vette Black Book handy to look up ratios available for your year. Good luck and be safe! :thumbs:
