Gear setup kit for a Ford 9 inch with 3.062 in carrier bearings and a solid pinion spacer: bearings, pinion seal, shims and setup hardware.
If you are putting new gears in a Ford 9 inch third member built around a Daytona pinion support, or a 9 inch that has started to howl under a street rod, race car or classic F-100, the gears need fresh bearings and the right preload parts under them. The Allstar Performance ALL68539 is a ring and pinion installation kit for a 9 inch with 3.062 inch carrier bearings and a solid pinion spacer, the setup most racers and serious street builds use instead of a crush sleeve.
The 9 inch is a drop-out design. The ring gear, carrier and pinion all come out of the housing as one center section, and the pinion lives in its own bolt-in support. In a Daytona support the pinion runs on a large head bearing and a tail bearing, and the distance between them is held by a solid steel spacer. Preload is set by fitting shims against that spacer until the pinion turns with the right drag, rather than by crushing a sleeve with the nut. That is more work on the bench, but the preload does not relax under hard launches the way a collapsed sleeve can. Pinion depth is set with shims between the support and the case, and the carrier rides on two tapered bearings positioned by threaded adjusters that also set backlash. Summit Racing's spec sheet for ALL68539 lists the head and tail pinion bearings, 3.062 inch carrier bearings, pinion seal, pinion nut, pinion shims, carrier shims, ring gear bolts and cover gasket, with a solid spacer for a Daytona pinion and no crush sleeve.
Two measurements decide which 9 inch kit you need. First the carrier bearings: 9 inch centers came with a smaller bearing and the large 3.062 inch bearing, so read the numbers on your old bearing or race. Second the pinion support: Daytona supports have a ribbed casting and a larger front pinion bearing, and this kit comes with the solid spacer for that design. Spline count matters too, since Summit lists this kit for a 28 spline pinion. If your center is not a Daytona solid-spacer setup, compare the Koyo XL-1007-1 install kit against your parts instead. If you want a full Daytona rebuild rather than a gear install kit, the USA Standard Daytona master overhaul kit is the other option. Our Ford 9 inch problems and rebuild cost guide explains the case and support variations.
ALL68539 fits Ford 9 inch rear centers with 3.062 inch carrier bearings and a Daytona-style pinion support using a solid spacer and a 28 spline pinion. The 9 inch was used across 1957-1986 Ford cars and trucks and in a huge number of aftermarket housings, so year alone does not tell you what is inside. Match the bearing size, support type and pinion spline before ordering, or send us a photo of your center section. More parts are in our rebuild kits category.
For gears, the Revolution Ford 9 inch 3.50 set and Yukon 3.50 set are common street choices. If depth needs a big change, add a Ford 9 inch pinion depth shim kit. Revolution's setup chart lists the Ford 9 inch at a 0.022 inch starting pinion depth, 13-15 in-lb pinion bearing preload, 0.006-0.010 inch backlash, 60 ft-lb ring gear bolts and 60 ft-lb bearing caps. Expect several trial assemblies to get preload right with a solid spacer. Read the pattern with marking compound as covered in our backlash and pinion depth guide, lock the adjusters, fill with 75W-90 or 85W-140 gear oil, and follow the gear break-in procedure.
| Part number | Allstar ALL68539 |
| Fits | Ford 9 in rear, 3.062 in carrier bearing, solid pinion spacer |
| Includes | Bearings, pinion seal, shims and setup hardware |
| Shipping weight | 6.1 lb |
No. This kit uses a solid pinion spacer for a Daytona pinion support, and preload is set with shims against the spacer. Summit's spec sheet lists no crush sleeve.
Read the part number on the old bearing or race, or measure the race outside diameter. The large bearing cases use the 3.062 inch bearing; smaller bearing cases need a different kit.
This kit is built for the Daytona support with its solid spacer. A standard crush-sleeve support uses different pinion bearings, so check your support before ordering.
Summit lists ALL68539 for a 28 spline pinion with 10 ring gear bolts.
No. Axle bearings and axle seals are not part of this kit, so price them separately if the wheel ends are worn or leaking.
A quality GL-5 gear oil in 75W-90 or 85W-140, with friction modifier if you run a clutch-type limited slip. Change it early after the break-in miles.
