I hate the 3 speed crashbox behind the flathead in my 1948 B1C. So I bought a A833 on eBay and the adapter plate from George Asche. I dropped the old transmission from my truck and now I have questions for the more experienced mechanics on the forum.
I guess I should request that we please keep our posts on topic. Previous discussions of the A833 swap were derailed by forum members with opinions on T5 swaps or members who think it's blasphemy to alter an original truck. As a result of the bickering, those threads about A833 swaps were either closed by the moderators, or else the posts were deleted by PO'd truck owners. Not much help there. So please, honest opinions of the process, honest answers to questions, or else ignore the topic.
The transmission arrived, 23 spline input shaft, long tailpiece version with dual shifter mounts. Hurst shifter on the rear mounting location. The seller told me that the transmission had been rebuilt by Brewer Performance here in Ohio, so I took a trip to Laura, Ohio to visit Dan Brewer. He told me that the plates in the Hurst shifter mechanism were not correct for the forward location and rebuilt it while I waited. The Input Bearing Retainer was smaller than the hole in the AoK adapter plate, but Dan had the correct size (5.125") retainer, as well as a slip yoke I needed and all new bolts, clips, and shift linkage that fit the forward shift location. Dan gave me $250 for the bell housing/long shift linkage from the eBay auction and I walked away with the parts I needed for $12.
Now that I had the slip yoke, I could turn the output shaft and count the revolutions on the input shaft. It looks like I have the close-ratio version of the A833 transmission.
2.47, 1.77, 1.34, 1.00 I'm happy with the non-overdrive version final ratio, since I have a 3.55 Jeep Cherokee rear axle. But is the first gear too high for my flathead? I read that the stock transmission had a 2.57 first gear. Is that correct?
Next I measured the input shaft on the stock transmission. The splines extend to 5.5" from the transmission face and the shaft is 7.5" long. The splines on the input shaft of the A833 extend 6" from the transmission face and the shaft is about 8.25" long. The adapter plate is about .375" thick, so we can subtract that.
Will the slightly longer splines and input shaft be an issue?
Help me out here, guys. I'm having a hip replacement on November 12th, and I'd like to get this done. I'm off to Harbor Freight to buy a cheap transmission jack. That transmission weighs 125 lbs!