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Which fender tag code items denote the factory installed transmission/shifter and differential/gear ratio on a 1972 Duster? Or better yet, where does one find the fender tag decoder link? Thanks.

Can anyone here steer me to a link or provide the gear ratios for an A-833 trans?

Hey, folks, building my '72 340 Duster and I have the option of using 2 differentials. First one is the one that came with this car, a '72 340 Duster with factory A-833 4 speed. Not sure of the gear ratio but definitely less than 3.91. It's an 8-3/4 diff. Option 2 is a 3.91, also an 8-3/4. This...

My kid's been trying to talk me out of my spare 4-speed to put on his '74 318 Duster. (He talked me out of my extra brake/clutch pedals already) My question is; will a manual trans retrofit on an auto trans crank without having the pilot bushing bore reamed oversize? According to the...

After checking out the rear end I have out of The Duke, I've determined it's a 489 8-3/4 Sure Grip in 3.55 with approx. 100,000 miles on it; no known problems. I also have the rear end out of the Li'l Red Minx after her untimely demise....determined to be a 489 8-3/4 Sure Grip with probably 3.91...

I've got an 8-3/4 diff in my Duster 340 4-speed, always assumed it's a 3.91 Sure grip, but how can I positively ID it? Thanks in advance!

I believe I have a 3.91 posi in my '72 340 Duster; how can I positively ID this rear end?