Yukon Gear High Performance Gear Set For 04 & Down Chrysler 8.25in in a 4.56 Ratio
Jeep Cherokee XJ owners on 31s to 33s, Dakota and Durango owners who added bigger tires, and classic Mopar builders who want hard launches all end up looking for the same part: a 4.56 ring and pinion for the Chrysler 8.25 in. rear. The Yukon Gear & Axle YG C8.25-456 is a new 4.56 gear set for the 8.25 (also called the C213), built for axles through the 2004 model year. It also replaces worn, howling factory gears when you are rebuilding the axle anyway.
The pinion takes power from the driveshaft and turns the 8.25 in. ring gear, which spins the carrier and axle shafts. At 4.56, the driveshaft turns 4.56 times per wheel revolution, a big torque gain over the 3.07, 3.55 and 3.73 range common in these vehicles, which is what larger, heavier tires need. Yukon specifies this set with an 8.25 in. ring gear, a 27-spline pinion and 10 ring gear bolts. The ring gear is double drilled for both 3/8 in. and 10 mm ring gear bolts, so it will accept whichever of those two bolt sizes your carrier uses.
Many truck and SUV owners first blame the transmission for a whine that is really the rear axle. Coast in neutral at the speed where the noise appears; if it stays, look at the axle. Our 46RE noise diagnosis guide walks through that on Ram, Dakota and Durango models. Then check your current ratio on the axle tag, and compare it with your transmission's gearing using the 46RE gear ratios and specs page before you settle on 4.56.
Yukon titles this set for 2004-and-earlier Chrysler 8.25 axles. That covers the 8.25 rear in the 1991-2001 Jeep Cherokee XJ, 1991-1992 Comanche, 2002-2004 Liberty, 1987-2004 Dakota, Durango through 2004, 1994-2004 Ram 1500 trucks with the 8.25, Ramchargers, B-series vans, and many 1960s and 1970s Dodge and Plymouth cars. The 8.25 has a 10-bolt cover with a flat bottom edge. Retailer fitment charts also list later 2005-and-up 8.25 axles (C213R/C213RE) in Liberty, Nitro, Dakota, Durango and Grand Cherokee models; those housings changed, so send us your year and VIN before ordering for a 2005-or-newer vehicle. On a 4x4, the front axle must get the same ratio; for the XJ we carry a 4.56 front and rear gear package with Dana 30 front gears.
The 8.25 sets carrier preload and backlash with threaded side adjusters instead of shims, so a side adjuster tool makes the job much easier. Pinion depth is set with a shim under the inner pinion bearing, and the pinion bearings are held by a crush sleeve that must be replaced. Order a bearing kit with the gears, such as the Yukon YK C8.25-B master overhaul kit. Yukon's setup chart lists the 8.25 (C213) with a 0.030 in. starting pinion shim, 12-15 in-lb of new pinion bearing preload, 55 ft-lb on the ring gear bolts and 60 ft-lb on the caps. Check the pattern, fill with 75W-90 or the grade in your manual, add friction modifier for a limited slip, and follow a gentle break-in with an oil change at 500 miles.
| Brand | Yukon Gear & Axle |
| Part number | YG C8.25-456 |
| Fits | Yukon Gear High Performance Gear Set For 04 & Down Chrysler 8.25in in a 4.56 Ratio |
| Type | Final Drive Gears |
| 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.
If your XJ has the Chrysler 8.25 rear (10-bolt cover with a flat bottom edge), yes. Some XJs came with a Dana 35 or Dana 44 rear instead, which take different gears, so check the cover and axle tag first.
Yukon titles this set for 2004-and-earlier axles. Retailer charts also list some 2005-and-later C213R and C213RE axles, but those housings changed, so send us your year and VIN and we will confirm before you order.
On any 4x4, yes. The front and rear ratios must match, or the driveline will bind in four-wheel drive. Order the matching front set for your front axle in the same 4.56 ratio.
The ring gear is double drilled for 3/8 in. and 10 mm bolts, so it accepts either bolt size an 8.25 carrier may use. Ask us if you are running an aftermarket locker or limited slip.
A master overhaul or bearing kit with pinion and carrier bearings, races, seal, crush sleeve and shims, plus a side adjuster tool, dial indicator, inch-pound torque wrench and marking compound.
