Rear wheel locked - 1993 Mercedes-Benz Mercedes Benz 300 Class

Seems like your emergency brake is engaged or stuck engaged

Wheel Bearings

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Adjustment

2002-05 Models

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Remove or disconnect the following:
   
   Rear wheel Brake drum Hub cover Cotter pin Lock nut cover
3. Adjust the locknut to achieve wheel bearing play of 0.001-0.006 inches (0.025-0.152 mm).

Removal & Installation

2002-05 Models

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Remove or disconnect the following:
   
   Rear wheel Brake drum Hub cap Cotter pin Lock nut cover Lock nut Wheel bearing retainer washer and the outer wheel bearing Hub assembly Grease seal Inner wheel bearing
3. Clean and inspect the wheel bearings and races for unusual wear or damage. Replace parts as necessary.

To install:

1. Pack the wheel bearings with grease for assembly.
2. Install or connect the following:
   
   Inner wheel bearing Grease seal Hub assembly Lock nut. Adjust the locknut to achieve wheel bearing play of 0.001-0.006 inches (0.025-0.152 mm). Lock nut cover Cotter pin Hub cap Brake drum Rear wheel
   

Elaine,

not work, do tell what makes you think it dont work (a lamp) or tires slipping or dead tires. (by tires mean that and traction)??????????

what mode fails, of the many, and where.???????



first off, we dont know what your tires are touching.

on road, or off road. pavement or ICE or snow.

that matters big time . (you read manual and match MODE to Road)

your lost operators guide explains all that, right?

eg: how and when to use, 4wd, its all there. I promise.

ControlTrac 4-wheel-drive system



here are the mode. which one , gives you problems.



quote ford with comments.



What are the modes, and how do they differ?

(note this is the operational behavior of a 2008 Ford Expedition. Newer and older Expeditions will vary only slightly)



• 2H 2-wheel-drive with high range gearing (1.00:1) Rear-wheel-drive capability,

2-wheel electronic traction control system is enabled



• 4A 4-wheel-drive Auto with high range gearing (1.00:1) Full-time all-wheel-drive capability, ((best on pavement or any time)

Electronically adjusted torque split to front & rear wheels, Electronically variable center differential,

Front driveshaft & rear primary driveshaft allowed rotational speed difference,

4-wheel electronic traction control system is enabled



• 4H 4-wheel-drive with high range gearing (1.00:1) Part-time 4-wheel-drive capability, (not for dry pavement EVER)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled



• 4L 4-wheel-drive with low range gearing (2.64:1) Part-time 4-wheel-drive capability, (off road usage, mostly)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled, ESC and RSC are disabled



In 4A mode the center differential is electronically-controlled and rear drive wheel bias. The on-board computer monitors for any sign of rear drive wheel slip (loss of traction)

If loss of traction is detected, the center differential is told to send a share of the engine\'s torque to the front drive wheels. It will not let the front driveshaft turn at the same speed as the rear driveshaft.



What about traction management?

1997-2002 model Ford Expeditions offered an optional limited-slip rear differential (LSD). A conventional open rear differential was standard along with the conventional open front differential and the electronic locking center differential.

comment with out LSD, one tire can spin, on say ice.

but the other 3 tires dont, in full time.

Have you pulled the wheel and checked the brakes yet ?

one wheel lock up ck brakes if they are locking abs solenoid or master cylinder line problem,brakes ok wheel bearing there is nothing else there to lock up.

you may have a bad ABS module but you may need further diagnostics to confirm this

rock the car to brake them free the brakes are locked up

did you bleed the brakes

I'll assume this is a manual 5peed. The transmission (a W5M33) has a viscous coupler (VC) inside that is linked to the transfer case shaft. This in turn connects to the prop shaft to the rear diff. The rear diff (for the TSi) is usually also viscous coupler to provide a limited slip (LS) function. So ... what can cause the rear wheel lock up? If the W5M33 VC breaks (unusual but not impossible), you'd probably still have rear wheel spin. If the transfer case brakes (quite common with hard use), it could lock up, locking the rear wheels. The W5M33 VC then would overheat. A VC is filled with silicon that smells vile when heated. Best case, you'll have to pull the transfer case off and inspect it. Worst case, pull the whole transmission out. If all is OK with the wheels off the ground and a rear LS, spin one rear wheel and the other does the same. On the front, no LS function, and one wheel will spin. Look at lancerproject.ca for more info on AWD transmissions.

okay you had brake work done!!! "THINKING" that was the problem originally right rear wheel locking up! okay,,, so doing brakes has not solved your problem! I would maybe look into rear end bearing??? do you have any load road noise from rear and do you have rear end fluid in differential? question to you was the baking plate ""WET"" looked damp? or moister get at it!??? seal might have leaked all fluid out??? all the above would be good place to start! good luck I hope this info helps you out.Happy new year.