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JL8Jeff · 11-21-2005, 03:16 PM

I've noticed that the rear in my 96 SS seems awfully rusty compared to everything else on my car. So noticed that on the highway in overdrive, I'm pulling 2200 rpm's at 70 mph. So if you work it backwards with the 275/40/17 tires it looks like it works out to 3.42 gears instead of 3.23 gears. Obviously it depends on the accuracy of the factory tach as well. But does anybody know if there is a date casting or any code stampings on the 4th gen rear so I can check to see if it was swapped out at some time?

11-21-2005, 03:16 PM	#1
JL8Jeff Hippy Mod, Bergermeister Meisterberger, Moderator Join Date: Aug 2004 Location: Ewing Posts: 6,216 iTrader: (3)	Hmmmm, do I have 3.42 gears? I've noticed that the rear in my 96 SS seems awfully rusty compared to everything else on my car. So noticed that on the highway in overdrive, I'm pulling 2200 rpm's at 70 mph. So if you work it backwards with the 275/40/17 tires it looks like it works out to 3.42 gears instead of 3.23 gears. Obviously it depends on the accuracy of the factory tach as well. But does anybody know if there is a date casting or any code stampings on the 4th gen rear so I can check to see if it was swapped out at some time? __________________ 69 Z28 JL8 4 wheel disc brakes - being restored 09 Silverado Z71