Koyo carrier and pinion bearings, solid spacer, seal, shims and ring gear bolts to set up a gear change in a Ford 9 inch with 2.891 in. carrier bearings.
Setting up new gears in a Ford 9 inch from a Bronco, F-100, F-150, early Mustang, Fairlane or Torino, or chasing a whine out of a tired third member, starts with fresh bearings. The ExCel XL-1007-1 is a Koyo bearing install kit for the 9 inch third member that uses the common LM102910 carrier bearing and the factory pinion support, with a solid pinion spacer in place of a crush sleeve. It is the kit you put on the bench next to a new ring and pinion.
The 9 inch is a drop-out design: the whole center section unbolts from the front of the housing. The pinion is straddle mounted, with two tapered bearings in a separate pinion support and a small pilot bearing at the nose of the pinion riding in the case. That third bearing is why the 9 inch is so strong, and also why it needs its own kit. The carrier rides on two tapered side bearings set by threaded adjusters rather than shims. Per the listing, the XL-1007-1 carries Koyo carrier bearings (LM102910 cone and LM102949 cup), front and rear pinion bearings for the factory pinion support (M88010 and M88048 for the inner), the pilot bearing, pinion seal and O-ring, a solid spacer, pinion shims, ring gear bolts, thread locker and gear marking compound. It replaces Richmond 83-1009-1 and Motive Gear R9RMKP and R9RMKTP.
Measure the carrier bearing first. This kit is for the 2.891 inch cup size with a 1.781 inch cone bore. Many 9 inch cases, including many Nodular cases and heavy-duty truck cases, use the larger 3.062 inch LM603011 bearing and need a different kit. Then check the pinion support: this kit is for the factory support with the M88010 inner bearing. Our Ford 9 inch rear end problems guide covers noise diagnosis and what is worth rebuilding, and the Ford 8.8 vs 9 inch comparison helps if you are not sure which axle is under the car.
The ExCel application list covers Ford 9 inch rear axles with the 2.891 inch carrier bearing, including the 1966-1986 Bronco, 1975-1983 F-100, 1975-1986 F-150, 1969-1983 E-series vans, 1965-1973 Mustang, 1957-1970 Fairlane, 1957-1979 Ranchero, 1968-1976 Torino, Galaxie, LTD, Thunderbird and Maverick, and Lincoln and Mercury cars such as the Cougar, Comet, Grand Marquis and Marauder. Because 9 inch third members were swapped between cars for decades, the year of the car tells you little; the bearing size and pinion support do. If your case takes the 3.062 inch bearing and a Daytona support, the Allstar ALL68539 Ford 9 inch install kit is built for that combination. More kits are in our rebuild kits category.
With the solid spacer, pinion bearing preload is set by adding or removing shims behind the spacer instead of crushing a sleeve, so plan on assembling and checking the pinion support more than once. Revolution's setup chart lists, for the 9 inch, a 0.022 inch starting pinion depth, 13-15 in-lb pinion bearing preload, .006-.010 inch backlash and 60 ft-lb for ring gear bolts and bearing caps; if your gear maker publishes different numbers, use theirs. Pinion depth on a 9 inch is set with shims between the support and the case, and the Ford 9 inch pinion depth shim kit gives you a full range if the kit shims run short. For new gears, the Revolution Ford 9 inch 3.50 ring and pinion is a popular street ratio. Set backlash with the threaded adjusters, lock them, then read the pattern with the marking compound. Our backlash and pinion depth guide explains the pattern, and the break-in procedure covers the first miles. Fill with 75W-90 or 85W-140 gear oil to suit how the car is used, and add friction modifier only if the carrier is a clutch-type limited slip.
| Part number | |
| Axle | |
| Carrier bearings | |
| Pinion support bearings | |
| Pinion preload | |
| Includes | |
| Replaces | |
| Weight |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Measure the carrier bearing cup. This kit is for the 2.891 inch cup with a 1.781 inch cone bore. If the cup measures 3.062 inches, your case uses the larger LM603011 bearing and needs a different kit.
No. It comes with a solid pinion spacer. Preload is set by shimming the spacer, and once set it does not keep collapsing under load the way a crush sleeve can.
This kit is for the factory pinion support with the M88010 inner pinion bearing. A Daytona support uses a larger bearing, so match the support to the kit before you order.
The XL-1007-1 replaces Richmond 83-1009-1 and Motive Gear R9RMKP and R9RMKTP.
Yes. The kit includes the pinion seal and O-ring, ring gear bolts, thread locker and gear marking compound, along with the carrier, pinion and pilot bearings, solid spacer and pinion shims.
No. This is the bearing and hardware kit. Order the gear set separately and install both at once.
