Yukon Gear 1541H Alloy Rear Axle For 03+ 8.8in Ford Crown Victoria w/ Abs

A rear wheel bearing that will not stay quiet on a 2003-or-newer Crown Victoria Police Interceptor, a Grand Marquis that keeps throwing gear oil onto a rear brake, or a Marauder that twisted a shaft at the strip all come back to the same part: the rear axle shaft. Yukon Gear and Axle YA F880039 is a 1541H alloy replacement shaft for the Ford 8.8 inch rear axle in 2003 and later Crown Victoria, Mercury Grand Marquis, Mercury Marauder and Lincoln Town Car. It is 31 spline, 34-3/8 inches long, 5 lug, and comes with a 35 tooth ABS tone ring already installed.

What the rear axle shaft does in a Panther 8.8

The 8.8 inch rear under these cars is a semi-floating, C-clip axle. Each shaft carries engine torque from the differential side gear out to the wheel and also holds up that corner of the car. A C-clip in the differential, behind the pinion cross shaft, keeps the shaft from sliding out. Out at the housing end there is no separate inner bearing race: the wheel bearing rollers run directly on a hardened journal on the shaft. That design is why a bearing that is left to grind usually ruins the shaft as well, and why fleet cars that ran hundreds of thousands of hard miles are common candidates for new shafts. The tone ring pressed onto the shaft gives the rear ABS sensor its wheel speed signal, so the ring on the new shaft has to be right for the system to work.

Symptoms that point to the axle shaft

• A hum or growl from one rear corner that changes as the car loads one side in a sweeping turn, typical of a worn bearing on the shaft journal.
• Gear oil on the inside of the wheel, on the brake rotor or pads, from a seal riding on a worn or grooved shaft.
• Visible pitting, flaking or a groove on the bearing journal once the shaft is pulled.
• A wheel that wobbles or a flange with measurable runout after a curb strike or crash.
• ABS or traction control lights with a rear wheel speed fault, if the tone ring is cracked, loose or missing teeth.

How to confirm it before you buy

Pull the shaft and look at the journal: if the old bearing rollers have worn a track into it, a bearing and seal alone will not last and the shaft needs replacing. Check the flange for runout with a dial indicator and inspect the spline end and the C-clip groove. Count the splines; this part is 31 spline. Then measure your old shaft overall and compare it to the 34-3/8 inch length Yukon gives for this part, and check that the ABS ring tooth count matches your original before you order. If any of it does not match, send us the year, model and VIN.

Fitment

Yukon lists this shaft for 2003 and newer Ford Crown Victoria, Mercury Grand Marquis, Mercury Marauder and Lincoln Town Car with the 8.8 inch rear axle and ABS. The 2003 model year is when Ford redesigned the Panther chassis, so earlier cars use different shafts; for older Panther cars and other Ford cars look at the Yukon 5 lug 7.5 and 8.8 axle for Ford, Lincoln and LTD. Yukon's listing gives a single part number and does not name a side, so measure the shaft you are replacing. More axle and differential parts are in our hard parts catalog.

Install notes

• Remove the rear cover and drain the oil, then pull the pinion cross shaft lock bolt and the cross shaft, push the axle in, and remove the C-clip before sliding the shaft out.
• Always install a new wheel bearing and seal with a new shaft, since the bearing rides on the journal. Use a new cross shaft lock bolt or clean threads with threadlocker.
• Keep the factory ABS sensor clean and check its gap to the new tone ring before you button it up.
• With the cover off, inspect the gears and carrier. A worn rear is a good time for the Yukon master overhaul kit for 2009 and earlier Ford 8.8, and drag-race Marauder owners often add a Yukon 31 spline mini spool for the Ford 8.8.
• Refill with 75W-140 or 75W-85 gear oil as listed on your axle tag or owner manual, and add friction modifier if the car has a Traction-Lok limited slip.

Does this axle fit a 2002 Crown Victoria?

Yukon lists it for 2003 and newer cars only. The Panther chassis was redesigned for 2003, so 2002 and earlier cars need a different shaft.

Is the ABS tone ring already on the shaft?

Yes. Yukon states the axle is ABS compatible and that a 35 tooth ABS ring is installed on it.

Is it a left or right side shaft?

The listing is one part number and does not name a side. Measure the shaft you are removing and compare it to the 34-3/8 inch length, or send us your VIN before ordering.

What should I replace along with the shaft?

A new wheel bearing and axle seal every time, because the bearing runs on the shaft journal. A new pinion cross shaft lock bolt and a cover gasket or RTV are also smart. If the rear is noisy, inspect the gears and carrier while it is open.

Will it fit a Marauder?

Yes, Yukon lists the 2003 and up Mercury Marauder along with the Crown Victoria, Grand Marquis and Town Car.