I've never paid much attention to the speedometer cables, as it usually stayed with the car. Now, I'm finding five different variations in a sample of three.
There are three speedo cables and two have 1" diameter bullets on the tranny end and the third maybe from a '64 T10, has an .875" bullet with an O-ring.
One, maybe from a C-cab truck, has a larger diameter cable housing than the two believed to be from cars.
I've got two Studebaker speedometer cable pinions. Both have 16 teeth. Both are the same length. One is larger in the gear diameter than the other. Looking at the side of the gear, the larger diameter (.8375") gear teeth slant up and to the right. The smaller diameter (.7790") gear teeth slant up and to the left.
The the two could have come from any one of four V8 trannies - T85, T86, T10 or T98.
1. Which is most likely the gear for the T85/T89?
2. As near as I can tell from part numbers, the T85/T89, T10 and T86 speedo pinons are interchangeable. Can anyone confirm this?
3. This will be going in a truck with a T89 3-speed overdrive, 4.11 rear axle ratio and 215/85-16 tires which turn 681 rev per mile. This is about the same as the old 7.00x16" and 21.2 MPH/1000 RPMs in 1:1 high gear.
As near as I can tell from my old parts book this would need a 682015 speedometer driven pinion. Would this be a 17-tooth pinion? If so, does anyone have one for sale?
Any speedometer experts care to calculate what speedo pinion this combination would need?
jack vines
There are three speedo cables and two have 1" diameter bullets on the tranny end and the third maybe from a '64 T10, has an .875" bullet with an O-ring.
One, maybe from a C-cab truck, has a larger diameter cable housing than the two believed to be from cars.
I've got two Studebaker speedometer cable pinions. Both have 16 teeth. Both are the same length. One is larger in the gear diameter than the other. Looking at the side of the gear, the larger diameter (.8375") gear teeth slant up and to the right. The smaller diameter (.7790") gear teeth slant up and to the left.
The the two could have come from any one of four V8 trannies - T85, T86, T10 or T98.
1. Which is most likely the gear for the T85/T89?
2. As near as I can tell from part numbers, the T85/T89, T10 and T86 speedo pinons are interchangeable. Can anyone confirm this?
3. This will be going in a truck with a T89 3-speed overdrive, 4.11 rear axle ratio and 215/85-16 tires which turn 681 rev per mile. This is about the same as the old 7.00x16" and 21.2 MPH/1000 RPMs in 1:1 high gear.
As near as I can tell from my old parts book this would need a 682015 speedometer driven pinion. Would this be a 17-tooth pinion? If so, does anyone have one for sale?
Any speedometer experts care to calculate what speedo pinion this combination would need?
jack vines
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