USA Standard Master Overhaul Kit For The 82-99 GM 7.5in and 7.625in Diff
The small GM 10-bolt, the 7.5 inch and its later 7.625 inch version, sits under a huge number of 1982 to 1999 cars and light trucks: S-10 and Sonoma pickups, S-10 Blazers, third and fourth generation Camaros and Firebirds, and the G-body Monte Carlo, Cutlass, Regal, Grand Prix and El Camino. When one of these starts to whine at cruise or leaks at the pinion, this USA Standard Gear ZK GM7.5-B master overhaul kit supplies all the bearings, seals, shims and hardware for a complete rebuild, with Koyo bearings and races.
Inside the 7.5 the pinion is supported by an inner and outer tapered bearing with a crush sleeve between them, and the carrier is held by two side bearings with shims that set preload and ring gear backlash. The axles are retained by C-clips on the inner ends. Because it is a light-duty axle, small amounts of bearing wear show up quickly as noise and a pattern that has drifted off the center of the teeth. This kit replaces the carrier bearings and races, the pinion bearings and races, the pinion seal, crush sleeve and pinion nut, and includes a complete shim kit, new ring gear bolts, thread locker, marking compound with brush and the cover gasket.
Raise the rear, drain the oil and pull the cover. Grab the yoke and check for up-and-down play, measure backlash with a dial indicator, and roll marking compound on the ring gear to read the pattern. If the teeth are clean and only the bearings are tired, this kit is the job. If the teeth are pitted or chipped, plan on gears as well, such as the GM 7.5 3.73 ring and pinion or the 3.55 thick-gear set, because new gears always need new bearings and a fresh setup.
The ZK GM7.5-B is listed for 1982 to 1999 GM 7.5 inch and 7.625 inch rears. To be sure you have a 7.5 and not an 8.5, measure the cover: the 7.5 oval cover is about 8 5/16 by 10 9/16 inches, and the bottom center cover bolt sits 3 1/4 inches from the bolts beside it. The 7.5 pinion shaft is 1.438 inches. Axles built outside the 1982 to 1999 window can use different bearings, and our separate ZK GM7.5 kit is a different bearing set, so match the part number to your axle or send us your year and VIN before ordering. Other axle and transmission kits are in our rebuild kits section.
Rebuilding a worn posi at the same time? The 7.5 and 7.625 Positraction internals pair with this kit, and the crush sleeve eliminator replaces the sleeve with solid shims if you prefer. Gears, carrier and axle bearings are not included.
| Brand | Yukon Gear & Axle |
| Part number | ZK GM7.5-B |
| Fits | USA Standard Master Overhaul Kit For The 82-99 GM 7.5in and 7.625in Diff |
| Type | Differential Overhaul Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 1982 to 1999 GM 7.5 inch and 7.625 inch rear differentials. Axles outside that range can use different bearings, so match the part number or send us your year and VIN.
Measure the cover. The 7.5 oval cover is about 8 5/16 by 10 9/16 inches and the bottom center bolt is 3 1/4 inches from its neighbors. The 7.5 also has a smaller 1.438 inch pinion shaft.
This USA Standard Gear kit uses Koyo bearings and races for the carrier and pinion.
Yes. New ring and pinion gears should always go in with new bearings, a new crush sleeve, a new pinion seal and fresh shims so the setup and pattern are correct.
Use 75W-90 gear oil. If the axle has a clutch-type limited slip, add the friction modifier it calls for.
