Yukon Gear Master Overhaul Kit For Dana 30 Front Diff
Older Jeeps put a lot of miles and a lot of water through their front axles. If the Dana 30 under your CJ-7, Cherokee XJ, Wrangler YJ or Comanche hums in four-wheel drive, leaks at the front yoke, or you are about to re-gear for bigger tires, the Yukon Gear & Axle YK D30-F master overhaul kit covers every bearing and seal in the center section. It is a new kit built with Timken bearings and races, and Yukon describes it as fitting the standard-rotation Dana Spicer 30 front.
The Dana 30 is a compact axle with an open-knuckle front design. Its pinion turns on two tapered roller bearings, and on these earlier axles pinion preload is set with shims behind the bearing rather than with the crush sleeve the later TJ axle used. The carrier rides on two side bearings, and shims behind them set carrier preload and ring gear backlash. Those four bearings are what hold the gears in their lapped position. When the races pit, usually from water getting past a worn seal, the pattern walks off the tooth center and the axle starts to sing. A master kit lets you replace all of it in one teardown.
Yukon's listed contents for the YK D30-F:
Drain the oil into a clean pan and look for water, chips or heavy metal paste. Disconnect the front driveshaft, spin the pinion by hand, and rock the yoke; roughness or in-and-out play means the pinion bearings are done. Paint a few teeth with marking compound to read the pattern. Worn unit bearings or wheel bearings, loose ball joints and a dry front driveshaft U-joint all make front-end noise too, so check those first. Also confirm which axle you have: if you have a TJ or a late Cherokee with the short-pinion axle, use the Yukon YK D30-TJ short-pinion kit, and a 2007-up JK needs the JK Dana 30 kit.
Yukon lists the YK D30-F for the standard-rotation Dana Spicer 30 front. Published vehicle lists for this kit include the CJ-5 (1971-1983), CJ-6 (1971-1975), CJ-7 (1976-1986), CJ-8 (1981-1985), Wrangler YJ (1987-1995), Cherokee XJ (1984-2001), Comanche MJ (1986-1992), the 1971-1973 Wagoneer SJ and the 1984-1993 Grand Wagoneer. Be careful here: many YJ, XJ and MJ front axles were built with reverse-cut gears, which Yukon's own description does not mention, and late Cherokees went to the short-pinion design. Read the tag on the axle or the numbers on your ring gear, or send us your year, model and VIN and we will confirm the right kit before it ships. A lower-cost USA Standard ZK D30-F kit covers the same axle, and more kits are in our rebuild kits collection.
| Brand | Yukon Gear & Axle |
| Part number | YK D30-F |
| Fits | Yukon Gear Master Overhaul Kit For Dana 30 Front Diff |
| Type | Differential Overhaul Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. The TJ Dana 30 uses a short pinion with a crush sleeve. Yukon makes the YK D30-TJ for that axle, and the 2007-up JK uses its own YK D30-JK kit.
Yukon describes the YK D30-F as a standard-rotation Dana 30 kit, while some vehicle lists include the YJ and XJ. Send us your VIN or the numbers from your axle tag and ring gear so we can confirm it before you order.
Yes. Along with Timken carrier and pinion bearings and races, the kit includes the pinion seal, inner axle seals, a complete shim kit, ring gear bolts, pinion nut, oil baffles and slingers, thread locker, marking compound and a cover gasket.
Yes, if the teeth show no chips, pitting or heat bluing. Keep the original shims to use as a starting point and verify the pattern after the new bearings are installed.
Plan on a bearing puller, a press, a dial indicator, an inch-pound torque wrench and ideally a housing spreader. Without them, a driveline shop should set the gears up.
