What gears do I have?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
My car (with turbo 400 tranny) turns 3000 rpm at 70 mph. I have 235R60-15 tires (same O.D. as original tires) and have a 3.36 rear gear. I think a 3.55 gear would have you turning about 3200 rpm and a 3.70 gear would put you at [or over] 3300 rpm.
I now have a 700R4 transmission in the car and turn 2150 rpm at 70 mph (when in lockup mode).
I now have a 700R4 transmission in the car and turn 2150 rpm at 70 mph (when in lockup mode).
Drifting
Joined: Mar 2011
Posts: 1,886
Likes: 9
On the underside of the diff housing, there are numbers and letters stamped. The first two generally spec the diff ratio (in code). The next number identifies the production plant, and the last three numbers will identify the production date. (In Julian calendar code- January first would be 001, December 31 would be 365,etc.)
You can post the numbers here and someone can probably interpret them for you.
