Yukon Gear Eaton-Type Positraction Carbon Clutch Kit w/ 14 Plates For GM 14T and 10.5in

A Chevy or GMC 2500 or 3500 with the full-floating GM 10.5 in. 14-bolt rear and a factory Eaton-style positraction will eventually start acting like an open differential: one tire spins on wet grass, a gravel ramp or snow while the other just sits there. Most of the time the case and gears are fine and the clutch plates are simply worn out. The Yukon Gear & Axle YPKGM14T-PC-14 is a 14-piece carbon fiber clutch set that rebuilds that clutch-type posi, and Yukon also lists it for 14-bolts running its own Dura Grip carrier. The "14T" and "10.5" in the name are the same axle, the GM corporate 14-bolt truck rear.

What the clutch packs do in a 14-bolt posi

An Eaton-type positraction is an open differential with two clutch packs added, one behind each side gear. Springs preload the packs, and under power the separating force of the spider gears squeezes them harder. Because each pack ties a side gear to the case, the axle shaft with traction keeps getting torque even when the other tire unloads. In a turn the plates slip so the outside wheel can run faster. Every time they slip they wear, and on a heavy truck that tows, the plates glaze and thin out until preload drops and the posi stops biasing torque. Carbon friction material is used in this kit for its heat tolerance and smooth slip, which suits a tow rig that turns tight in parking lots and job sites under load.

Symptoms of worn posi clutches

• One rear tire spins under load where the truck used to pull with both
• Chatter, shudder or a stick-slip groan in slow tight turns, often worse after the oil has been changed
• A pop or bang from the rear in turns, which can also mean a worn spider gear or cross shaft
• Fine bronze or black friction debris on the cover magnet or in the drained oil
• Low breakaway torque when you check it with both rear wheels off the ground

How to confirm before ordering

First make sure you actually have a clutch-type posi. Check the RPO sticker; G80 means the factory Gov-Lock locker, which uses a flyweight governor and is a different design. Yukon's catalog notes say this set is for Eaton positraction carriers only and will not work in a Gov-Lock. Our G80 locker problems guide shows how to spot one with the cover off. Next confirm the axle: a 14-bolt cover alone does not prove it is a 10.5, because the semi-float 9.5 and the AAM 11.5 also have 14 cover bolts. The 14-bolt vs AAM 11.5 guide walks through the tells. Then pull the cover and inspect the spider gears and cross shaft; if they are chipped, the carrier needs more than clutches.

Fitment

This kit is for the GM 10.5 in. 14-bolt full-floating rear axle with an Eaton-type clutch positraction, and for 14-bolts fitted with the Yukon Dura Grip for the 10.5 14-bolt. It does not fit the AAM 11.5 used in 2001-up GM HD and 2003-up Ram HD trucks, the semi-float 9.5, or any G80 locker. Factory posi carriers were used across decades of GM 3/4 and 1-ton pickups, Suburbans and vans, so if the carrier has been swapped or you are unsure what is in there, send us your year and VIN, or a photo of the carrier, and we will help match it. More 14-bolt parts are in our rebuild kits section.

Install notes

• Pull the hub flange bolts and slide out both full-float shafts, then remove the carrier. Mark the bearing caps so they go back on the same sides.
• Lay the old plates out in order as they come out of each side, then build the new packs in the same sequence. Compare stack heights to the originals before assembly.
• Coat the new plates with the same gear oil you will fill with before stacking them, so they do not run dry on first start.
• While the carrier is out, look hard at the carrier and pinion bearings; this axle is known for bearing wear, and the ZK GM14T-A master overhaul kit covers the bearings and seals. Leaking hub seals can be done with the AK GM14T axle bearing and seal kit.
• Fill with gear oil and limited-slip friction modifier as the carrier maker calls for; Yukon's Dura Grip guidance is a non-synthetic GL-5 with additive. Our friction modifier guide covers dosing. Drive a few figure-eights to seat the plates.
• If you would rather never rebuild clutches again, the Grizzly Locker for the 10.5 14-bolt is the no-clutch alternative.

Will this clutch kit fit my G80 locker?

No. The G80 Gov-Lock uses a flyweight governor and a different clutch arrangement. This set is for Eaton-type clutch positraction carriers and Yukon Dura Grip units in the GM 10.5 14-bolt only.

Does it fit the AAM 11.5 under my 2001-up Silverado 2500HD?

No. The AAM 11.5 also has a 14-bolt cover but is a different axle with different carriers. This kit is for the older GM 10.5 in. corporate 14-bolt full floater.

How many plates are in the kit?

It is a 14-piece carbon fiber clutch set for one carrier. Build each pack in the same order and orientation as the plates you remove, and compare the stack height to the originals.

Do I need friction modifier with carbon clutches?

Follow the carrier maker's lube instructions. For the Yukon Dura Grip, Yukon calls for a non-synthetic GL-5 gear oil with limited-slip additive. If the posi chatters in tight turns after the rebuild, friction modifier dosing is the first thing to check.

What else should I replace while the carrier is out?

Inspect the spider gears, cross shaft and side gears, and check the carrier and pinion bearings. A cover gasket and fresh gear oil are needed regardless, and leaking hub seals are easy to do with the shafts already out.