Information about which model of the Pinto rear end is best to use in the IH Cub Cadet transaxle.
(Created 11/14/01)
This was originally written by Todd O'Neill. He had some problems installing a Ford Pinto rear end. Through his investigation, he have found the following:
- The 1971-'73 Pinto differentials are interchangeable, '74 through '78 differentials are interchangeable and '79 and '80 differentials are interchangeable.
- The '71-'78 dfferentials have the same bearings as IH Cub Cadet. '79-'80 have a larger bearing. I do not know the difference in the '71-'73 and the '74-'78 but I had two salvage yards find the same information, that the '73 and '74 were different.
- Axles in the '79-'80 models have 25 splines and about 1-1/8" in diameter at the spline area. Axles on the '74-'78 models have 23 splines and about 15/16" in diameter at the spline area. I do not know about the '71-'73 axles. Note: I am using a '75 model differential in my Cub Cadet.
I did not machine the Pinto
differential case to make it shorter. It seemed to me that this would make
the bearing surface area about 1/8" thinner due to the fact that the farther
you go towards the ring gear the larger the hole becomes. I machined the
bearing cup .900" on the long end of the differential, to make the bearing
race go farther back into the cup. See photo #1. This made the area on the
bearing cup that keeps the bearing from pushing out very thin. I then used
a 3/8" thickness steel plate over the flange to give it support. See photo
#2. This cup is on the opposite side of the ring gear, so there should not
be much pressure pushing it out.
When shimming the backlash, I had to remove all of the shims from the bearing cup on the ring gear side. I didn't use a dial indicator to check the backlash, but I think it will be okay. If I decide to move the ring gear closer to the pinion, I would have to add a shim behind the differential bearing or machine the flange on the bearing cup. By not shortening the differential, you must put the differential and ring gear in separate and bolt it together inside the rear end.
Sincerely,
Todd O'Neill - My e-mail address is:
oneills@svs.net (Todd
O'Neill)
Set of cut Carlisle Super Lug 23 x 10.50 x 12 tires - $65.00. |
Reinforcement plates for stock Cub Cadet bearing cups (they match the
cup's shape) 1/4" or 3/8" thickness - $20 each. |
Prices are plus shipping. Contact: Todd O'Neill of Shelbyville, IN, USA | E-mail: oneills@svs.net (Posted 11/18/01)
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