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Most half-ton trucks, Mustangs, Camaros, Jeeps with a Dana 35 and a lot of SUVs keep their rear axle shafts in the housing with a pair of small horseshoe-shaped C-clips inside the differential. It is cheap, it is easy to service, and it works fine for millions of miles of normal driving. Its weakness shows up the day a shaft breaks or the bearing journal wears out, because with a C-clip axle the clip is the only thing holding the wheel on the truck. A C-clip eliminator kit changes that. Here is how the two systems differ, when the eliminator is worth the money and when it is a solution looking for a problem.
How a C-Clip Axle Works
The axle shaft slides through the housing tube and its splines go into the side gear in the carrier. A small groove machined near the inner end of the shaft holds a C-clip. Once the clip is in the groove, the cross shaft (pinion shaft) goes in through the carrier and blocks the shaft from sliding inward far enough to release the clip. The clip cannot come out and the shaft cannot pull out.
At the outer end, the shaft rides on a roller bearing pressed into the housing tube. The rollers run directly on a hardened section of the shaft itself, the bearing journal. A lip seal outboard of the bearing keeps gear oil in. There is no retainer plate at the wheel end.
Common C-clip axles: Ford 7.5 and 8.8, GM 7.5/7.625, 8.5/8.6, 9.5 and 9.76, Chrysler 8.25 and 9.25 rear, Dana 35, and many Toyota and Nissan IRS and solid rears from certain years. Check the cover: if pulling the cross shaft is part of removing an axle, you have C-clips.
Where C-Clips Fail
Broken axle shaft
If the shaft breaks outboard of the C-clip, the outer section and the wheel are no longer held by anything. The wheel, brake drum or rotor and the outer piece of the shaft can slide out of the housing, sometimes far enough to take the brake and fender with it. That is the scenario that gets C-clip axles banned from some race classes. On a stock truck it is rare, but big tires, lockers and hard launches make it much more likely.
Worn bearing journal
Because the bearing rollers ride directly on the shaft, a failed bearing usually grooves the shaft. You pull the axle and see a bright, pitted or stepped band where the rollers ran. Put a new standard bearing on that and it will be loud again within months. You either replace the shaft or use a repair bearing that sits on a fresh, unworn section of the journal. Our rear axle bearing noise and seal guide covers how to tell which you need.
Shaft end play
C-clip axles have some designed-in end play, the shaft can slide in and out a few thousandths. Worn clips, a worn cross shaft or a worn clip groove let it walk more. You hear a clunk in turns or feel the ABS tone ring wobble and trigger a wheel speed fault. Cross shaft wear is a common source: look for a step on the shaft where the spider gears ride.
What a C-Clip Eliminator Does
An eliminator kit converts the axle to bearing-retained at the outer end, similar to a Ford 9-inch or most full-size semi-float axles that use press-on bearings. A typical kit includes:
- Sealed, press-on ball or tapered bearings that ride on the shaft, not directly on the shaft journal.
- Housing-end caps or flanges that bolt to the brake backing plate bolts and capture the bearing.
- Bearing retaining collars pressed onto the shafts.
- In some kits, shims or spacers to set end play.
With the eliminator installed, the C-clips are left out. The wheel end holds the shaft, so if the shaft breaks inboard of the bearing the wheel stays on the truck. The shaft also stops floating side to side, which helps with ABS tone ring position and with clunk in turns.
C-Clip vs Eliminator, Side by Side
| Factory C-clip | C-clip eliminator | |
|---|---|---|
| Wheel retention if shaft breaks | None, wheel can slide out | Retained at the bearing |
| Bearing rides on | Axle shaft journal directly | Its own inner race, pressed on |
| Axle removal | Pull cover and cross shaft, push in, remove clip | Unbolt end, pull shaft with a slide hammer, no need to open the diff |
| End play | Some, grows with wear | Minimal |
| Cost | Bearing and seal about $40-$80 per side | Kit about $200-$450 for both sides plus install |
| Race track legal | Not in many classes | Yes, often required |
Who Actually Needs One
Drag racing. Most sanctioning bodies require C-clip eliminators or full aftermarket bearing-retained shafts once a car runs quick enough. If you are racing an 8.8 or 10-bolt car, this is not optional.
Lifted trucks on big tires with a locker. A 35 inch tire, a Detroit Locker and a stock 28-spline shaft is a combination that breaks shafts. The eliminator is cheap insurance, though moving to stronger axles is the actual fix. If you are in the Dana 35 world, our Dana 35 upgrade guide makes the case for going straight to a stronger axle.
Towing at the top of the rating. Heavy trailers put side load on the wheel end. A shaft break with a trailer behind you is a bad day. If your half-ton tows near its limit, an eliminator is a reasonable upgrade during a bearing job.
Stock daily drivers. Honestly, most do not need it. Factory C-clip axles go the life of the truck in normal service. Replace bearings and seals when they get loud, check the cross shaft, and keep fresh gear oil in it.
Install Notes
Do both sides at once, and do the job with the diff cover off so you can pull the C-clips and the cross shaft, then refit the cross shaft with its retaining bolt and fresh thread locker. Clean the housing ends; the eliminator caps need a flat surface and the factory seal bore must be clean. Bearing collars need a press. Do not heat them with a torch on the shaft unless the kit instructions say so.
For the factory C-clip bearing and seal job, a 13-piece rear axle bearing puller and seal driver kit ($83.99) does the bearing extraction and seal install without damaging the housing tube. Toyota owners have a dedicated Tacoma rear axle bearing puller and ABS tone ring kit ($124.99).
If you are pulling the carrier anyway to swap in a limited slip or locker, that is the ideal time to add the eliminator. Our Detroit Locker vs Truetrac guide covers which carrier to put in, and the Truetrac for Ford 8.8 ($803.99) is a common pairing on Mustangs and F-150s.
Keep the Wheels on the Truck
Bearing tools for the C-clip job, plus traction upgrades if the carrier is coming out anyway.
Shop Axle Bearing Tools → All Shop ToolsFAQ
How do I know if my rear axle has C-clips?
If removing an axle shaft requires pulling the differential cover and the cross shaft first, it has C-clips. Common C-clip axles include the Ford 7.5 and 8.8, GM 8.5 and 9.5 10-bolt and 12-bolt, Chrysler 8.25 and 9.25 rear and Dana 35.
What happens if a C-clip axle shaft breaks?
If it breaks outboard of the C-clip, nothing holds the outer piece and the wheel can slide out of the housing, taking the brake assembly with it. A C-clip eliminator or bearing-retained shaft keeps the wheel in place.
Do I need a C-clip eliminator for towing?
Not for normal towing. Factory C-clip axles are designed for the truck's rating. An eliminator is cheap insurance if you tow near the limit, run oversized tires with a locker, or drag race.
Can I reuse an axle shaft with a grooved bearing journal?
Not with a standard bearing. Either replace the shaft or use a repair bearing designed to ride on an unworn section of the journal. A new standard bearing on a pitted journal will be noisy again quickly.