Question about 2002 Ford E350

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Grind in Dana Differential

I have grinding sound and feel in rear Dana Differential when turning right at slow speed. It is limited slip diff on 2002 Ford E350 with 7.3L diesel motor. This problem has existed since day one. What is the cause?

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Drain the fluid and refill with limited slip gear oil, add one bottle of friction modifier, ( this is very important) the noise is the clutches sticking.

Posted on Mar 05, 2009

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3 Answers

Rear cluch not working


Depends on what model and components you have:

{ ...
ENGINE TORQUE DISTRIBUTION – DIRECTING THE FLOW OF POWER
In an all-wheel-drive vehicle, engine power can be directed to all four wheels. Subaru Symmetrical AWD differs slightly from model to model in how it directs power to the wheels, depending on its transmission.

MODELS WITH FIVE-SPEED MANUAL TRANSMISSION – CONTINUOUS ALL-WHEEL DRIVE: A viscous-type locking center differential and limited-slip rear differential help distribute torque – normally configured at a 50/50 split front to rear. If wheel speed differs between front and rear axles, the center and/or rear differentials lock up to help distribute power to the wheels with the most traction.

MODELS WITH FOUR-SPEED AUTOMATIC TRANSMISSIONS – ACTIVE ALL-WHEEL DRIVE: An electronically controlled variable transfer clutch and limited-slip rear differential distribute power to where traction is needed. Sensors monitor parameters such as wheel slippage, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction.

MODELS WITH FIVE-SPEED AUTOMATIC TRANSMISSION – VARIABLE TORQUE DISTRIBUTION ALL-WHEEL DRIVE: As with Active All-Wheel Drive, an electronically controlled variable transfer clutch distributes power, but through a planetary-type center differential and a viscous-type limited-slip rear differential. Torque distribution is normally configured at a performance-oriented rear-wheel-biased 45/55 split front to rear. Sensors monitor the same parameters as for Active All-Wheel Drive.

WRX STI, WITH SIX-SPEED MANUAL TRANSMISSION – DRIVER CONTROLLED CENTER DIFFERENTIAL (DCCD) ALL-WHEEL DRIVE: The STI uses an electronically managed multi-plate transfer clutch and a mechanical limited-slip differential in conjunction with a planetary-gear-type center differential to control power distribution between the front and rear wheels. Featuring manual and three automatic modes, DCCD is normally configured at a 41/59 split front to rear. Sensors monitor parameters such as wheel slippage, steering angle, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction. DCCD also features a limited-slip helical front and Torsen® rear differential. ... }

And what are the symptoms? How do you know the coupling to the rear is not working?

Jun 05, 2010 | 1995 Subaru Legacy

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The problem sounds and looks like its in my rear end when i turn left or right my rear end acks like its locked in and my rear tire sqeel but when im driving foward or back it dont act up. it only does...


Sounds like you have a limited slip or " Posi-Traction" rear differential, if this is the case than go to the GM dealer and ask them for a bottle of friction modifier oil for limited slip differential. This stuff is pure whale oil that helps to lubricate the clutches in the differential. After adding the lube find your self a big empty parking lot or other paved surface and drive the vehicle forwards then backwards in a slow figure 8 patern, turn as tight as you can each way, this will force the clutches to work and help limber them up. The differential might make some crunching sounds, but the noise should quit as the lube gets in and does its job.

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when you take the rear cover off of the differential housing you will see a whole bunch of small clutches between the spider gears and the ring gear housing, you will see that the axles go right through them. If it is not a limited slip it will not have these clutches

Jun 25, 2009 | 1998 Jeep Wrangler

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Do i need a differential case and pinion ket or just bearings


if you have limited slip, make sure you have fresh fluid and limited slip additive. does the differential whine or make noise? if so thats a dead giveaway of a bearing or gear problem, look for metal debris or chunks when you pull the diff cover off

May 07, 2009 | 2005 Dodge Ram 3500

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Turbo 2ooo i think it might be some sort off bushes


juddering is UK english for shuddering in US english. The center bearing shouldn't move, i/e/ the shaft should rotate w/o side play in the bearing, but the rubber mounts for the bearing should be flexible. The needle bearings in the universal joints in the front to rear drive shaft can go bad, causing noise when accelerating and they're not changeable w/o special tools. Your problem also sounds like differential, which would mean that you need to change the gear oil in the rear differential. As the oil ages it stops working properly in the limited slip differential even if visually OK. Do the front differential at the same time, engine heat ages it even faster. The center diff is in the AT, so you would change the AT filter and fluid.
How to tell which problem you have... in a parking lot with dry pavement, stop the vehicle, turn the wheel hard right, accelerate a moment, and repeat hard left and centered. If its worse turning, than straight suspect the differential fluids first. If its the same turning or not and especially if its the same on wet or dry pavement and at slow and high speed then look into the propeller shaft first.

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1 Answer

Screaching noise on slow lrft and right turns from rear differential


hmm, might be that the gear oil of your rear diff needs to either drained and refilled or just topped off. the gear oil for differentials like those use a special kind of oil which is called hypoid and this is specifically used on limited slip differentials.

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