Can anyone tell me where to find what Ring Gear Casting #1373912 & Pinion Gear Casting #1373911 will fit? I took them from a '66 Wildcat, that looked very original, I need to know if they will fit a '70 Riviera or what else do they fit. I know they are a 3:23 Ratio 42-13. Thanks in advance! Doug
I have a 70 Assembly manual, not great print quality, but I was able to find the 1373911 pinion part number, but not the 1373912.
No, it was just in the big car section of the 1970 assembly manual. Very hard to read, it's a poor copy.
1966 -197 RING AND PINION should interchange between all FULL SIZE Buick cars with the 9 3/8" rear has a 10 bolt cover and 12 bolt ring gear 1.875 pinion shaft 28 spline yoke spline. (IT MUST LOOK LIKE THE REAR COVER WE ATTACHED) ONLY in 1966 did they have a carrier that had equal carrier bearings the late 66-70 were unequal carrier bearings in diameter and width. The axles are all 30 spline bolt in. So Wildcat, Electra, Invicta, Riviera, and even the Lesabre if it had a 455 original engine will have this size rear. Hope that helps. Jim JD
Jim, Thanks for the reply! So I am guessing that the Carriers from '66-'70 also interchange except for the early '66 with the equal size Carrier Bearings. (which is what I have) Thanks Again, Doug
