30-12-2019, 05:43 AM
Hi Ruairidh,
You might be on to something there. I have no history of the unit but when I stripped it I found a 8:42 ratio inside. Markings on the differential case say 11/4/32 and then the numbers 8879 with an 8/42. The torque tube looks like the one in Woodrow figure E4-3 but when I came to assemble it I found that the ball bearing adjacent to the pinion would not fit on the new shaft and I had to source a roller bearing as shown in figure E5-1. Unlike figure E5-1 my torque tube does not have a separate bearing housing that sits between the tube and the diff.
So it looks like I’m trying to get pinion for a 1933 -39 unit in to 1932 torque tube, so that could be a problem I guess.
Any thoughts on options? Our parts book (Queensland Australia) shows a 1928-29 9/44 option or what I purchased, a 1935-37 8/42. Nothing for a 1932. I’m assuming the 1928-29 option will not work as it suits a screw in torque tube.
I guess I could bolt it up and see what happens but that will always annoy me. I see the A7 components site lists “5.25:1 (short pinion shaft) for post-1931 cars; with or without the 11/8" shoulder behind the pinion gear (as fitted from November 1934)”, I wonder if this is a viable alternative?
You might be on to something there. I have no history of the unit but when I stripped it I found a 8:42 ratio inside. Markings on the differential case say 11/4/32 and then the numbers 8879 with an 8/42. The torque tube looks like the one in Woodrow figure E4-3 but when I came to assemble it I found that the ball bearing adjacent to the pinion would not fit on the new shaft and I had to source a roller bearing as shown in figure E5-1. Unlike figure E5-1 my torque tube does not have a separate bearing housing that sits between the tube and the diff.
So it looks like I’m trying to get pinion for a 1933 -39 unit in to 1932 torque tube, so that could be a problem I guess.
Any thoughts on options? Our parts book (Queensland Australia) shows a 1928-29 9/44 option or what I purchased, a 1935-37 8/42. Nothing for a 1932. I’m assuming the 1928-29 option will not work as it suits a screw in torque tube.
I guess I could bolt it up and see what happens but that will always annoy me. I see the A7 components site lists “5.25:1 (short pinion shaft) for post-1931 cars; with or without the 11/8" shoulder behind the pinion gear (as fitted from November 1934)”, I wonder if this is a viable alternative?
Steve & Tate Davidson
Perpetual Amateur Austineers
Perpetual Amateur Austineers