Extra-credit exam question. I need my driveshaft shortened now that I have stepped up to an 8.5. I might just get one fabricated new, since I need to fit a Ford 31-spline yoke to it in order to match the Tremec TKO. I am trying to make the driveshaft length measurement. With the car on the ground, how much of the yoke sealing surface should show on the output of the tailhousing seal?
Next - bearings. When I search under Regal with 3.8T, Rock Auto lists both a 1-1/8" and a 1-3/16" bearing size. In a stock configuration, the U-joint is the same in the front and rear locations, so I prefer to replicate the 8.5 yoke bearing size at the other end. For my application, I know the Ford-style yoke uses a Spicer 1310, and I think the GM driveshaft uses a 331 (Spicer 1350, 1-3/16") with an clip that fits into a groove in the yoke ears. There is also a 534G (Mechanics 3, 1-1/8") for the GM that has a lock ring that fits into a groove around the bearing caps.
Next - bearings. When I search under Regal with 3.8T, Rock Auto lists both a 1-1/8" and a 1-3/16" bearing size. In a stock configuration, the U-joint is the same in the front and rear locations, so I prefer to replicate the 8.5 yoke bearing size at the other end. For my application, I know the Ford-style yoke uses a Spicer 1310, and I think the GM driveshaft uses a 331 (Spicer 1350, 1-3/16") with an clip that fits into a groove in the yoke ears. There is also a 534G (Mechanics 3, 1-1/8") for the GM that has a lock ring that fits into a groove around the bearing caps.
