Yukon Gear Grizzly Locker For Dana 60 / 4.56+ / 35 Spline
Running 4.56, 4.88 or 5.13 gears in a Dana 60 and still watching one tire dig a hole while the other sits still? The YGLD60-4-35 is Yukon's Grizzly Locker for Dana 60 axles that use 35-spline shafts and a ratio of 4.56 or numerically higher. It is a full replacement carrier that locks both sides together under power with no air compressor, cable or wiring, and it is aimed at older Ford F-250 and F-350, Dodge W-250/W-350 and 2500/3500, GM K30 and swap builds where 35-inch and larger tires already forced a deep regear.
A stock open Dana 60 carrier splits torque evenly, so the axle quits pulling the moment one tire unloads on a ledge or in mud. The Grizzly removes the spider gear set and uses two toothed clutch rings that stay meshed whenever the truck is driving or coasting in a straight line, so both 35-spline shafts turn at the same speed. In a corner the outside wheel needs to run faster; its ring ratchets over the teeth and overruns, then drops back in when the turn ends. Yukon describes the tooth form as having a larger radius at the root of the inner clutch teeth, rated at up to 350 percent stronger than back-cut designs, and the internals are 8620 steel assembled in the USA. On a Dana 60 that matters because the axle usually gets paired with big tires and a diesel, and shock loads from a wheel hopping off a rock are what break carriers, not steady pull.
Three things must match: Dana 60 housing, 35-spline shafts and a 4.56-or-higher gear set. Dana 60 carriers come in two series, and the 4.10-and-down case will not accept 4.56-and-up gears. Our Dana 60 ring and pinion guide explains the break and how to read the axle tag, and the carrier break explainer shows how it affects locker orders. Count the shaft splines if anyone has swapped axles. Bearing noise, pinion play and seal leaks worth fixing in the same job are covered in Dana 60 rear axle problems.
This listing is the Dana 60, 35-spline, 4.56-and-up version. Retail application notes describe it for full-float axles and state that it is not compatible with C-clip axles, so a semi-float Dana 60 rear is out. Ford Dana 60s mostly use 35-spline inner shafts, while some Dodge and GM units are 30 spline; if your shafts are 30 spline or your gears are 4.10 or lower, this is the wrong carrier. If you are running stock 4.10s, compare the Truetrac for 35-spline 4.10-and-down. Wanting a switch instead of a full-time locker? The Eaton ELocker4 14023-010 covers the same spline and ratio range; ELocker vs Grizzly lays out the tradeoffs. Not sure which Dana 60 you have? Send us the year, VIN and axle tag before ordering. More carriers are in the hard parts category.
Pull the shafts, mark and remove the bearing caps, and spread the housing slightly to lift the carrier out; Dana 60 carrier preload and backlash are set with shims behind the bearings, so a housing spreader makes the job far easier. Bolt your existing 4.56-plus ring gear to the Grizzly with clean threads and new bolts, then press on new carrier bearings. The Motive 706047XR carrier bearing kit fits Dana 60 standard and reverse axles, and if the gears are being replaced too, the Yukon 4.56 gear set and a Dana 60 master install kit belong in the same order. Check the pattern and backlash once it is shimmed. Fill with 75W-90 or 75W-140 GL-5 gear oil; there are no clutch packs, so the locker does not need friction modifier. Expect some ratcheting in tight parking-lot turns and a little push on a single-rear-wheel truck. In a front Dana 60 an automatic locker will tug at the steering whenever the hubs are locked, so most owners keep it in the rear.
| Brand | Yukon Gear & Axle |
| Part number | YGLD60-4-35 |
| Fits | Yukon Gear Grizzly Locker For Dana 60 / 4.56+ / 35 Spline |
| Type | Differentials |
| 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.
No. Dana 60 carriers are split at the ratio break, and this case is for 4.56 and numerically higher gears only. With 4.10s or lower you need a 4.10-and-down carrier or a regear.
No. Application notes for the YGLD60-4-35 list it as not compatible with C-clip axles. It is meant for full-float Dana 60s with 35-spline shafts.
New carrier bearings and races at minimum, plus a cover gasket or sealant. If the pinion bearings are tired or you are regearing, a full Dana 60 master install kit is the better buy.
A quality 75W-90 or 75W-140 GL-5 gear oil. The Grizzly uses toothed clutch rings, not friction plates, so no friction modifier is required for the locker.
Many owners run them daily. Expect clicking in slow, tight turns and a slight push on dry pavement. If you want open-diff manners on the street, a selectable locker such as the ELocker4 is the alternative.
