Rear Differential
11-02-2009, 01:45 AM
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Rear Differential
I got a good deal on a slightly used Mag Hytec differential cover off of a truck my brother was parting out. Decided I would go ahead and put it on this weekend and man was that a good idea. The truck just rolled past 5,000 miles and the diff fluid was a milky grey color. I know differentials have to break in but the fluid was shot. You all might want to check yours should you have the time.
11-02-2009, 09:44 AM
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It should still be clear with a little bit of metal in it. When I changed the diff fluid on the Mach 1 at around 60,000, it was as clear as it could be. From what I have read, a grey color is indicitive of moisture entering the housing. It seemed like everything was sealed up well, so I'm not sure if something went wrong during production or what.
11-02-2009, 10:04 AM
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Did you put Royal Purple in? Or whatever that brand is.....
Just curious as I was thinking of doing that. I just noticed my rear diff cover was barely dented on the F-150 and was considering taking it off / fixing it / painting it black.....
Just curious as I was thinking of doing that. I just noticed my rear diff cover was barely dented on the F-150 and was considering taking it off / fixing it / painting it black.....
11-02-2009, 10:27 AM
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Yep, I replaced it with Royal Purple. Thinking about what the stock cover looked like, I do remember a spotty sealing job around the edge. Though I didn't have any leaks (Heavy oil), it was probably pushing water in (Thin liquid) as I do cross a few streams here and there.
11-02-2009, 03:12 PM
#6
Ford/Mazda Parts guy
Have you taken it offroad at all?
We have had a couple come through the shop that got their trucks stuck and water got in through the vent.
They were stuck for a while,but what you described sounds just like water contamination.....
We have had a couple come through the shop that got their trucks stuck and water got in through the vent.
They were stuck for a while,but what you described sounds just like water contamination.....
11-02-2009, 04:05 PM
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Yeah, it has been through a few streams but nothing too extreme. pon removing the stock cover, there was practically zero sealant around the lip which leads me to believe that is where the water came in. Just a thought for everyone to check theirs in case the seal around the cover was poorly assembled.
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11-02-2009, 04:08 PM
#8
Ford/Mazda Parts guy
Yeah, it has been through a few streams but nothing too extreme. pon removing the stock cover, there was practically zero sealant around the lip which leads me to believe that is where the water came in. Just a thought for everyone to check theirs in case the seal around the cover was poorly assembled.
The cab was the Dark Blue,the bed was Blue Flame......
11-02-2009, 10:03 PM
#9
Bye F150, hello F250
FYI: Manual, page 305;
Mud and water
If you must drive through high water, drive slowly. Traction or brake capability may be limited. When driving through water determine the depth; avoid water higher than the bottom of the hubs (if possible) and proceed slowly. If the ignition system gets wet, the vehicle may stall.
If you must drive through high water, drive slowly. Traction or brake capability may be limited. When driving through water determine the depth; avoid water higher than the bottom of the hubs (if possible) and proceed slowly. If the ignition system gets wet, the vehicle may stall.
Once through water, always try the brakes. Wet brakes do not stop the
vehicle as effectively as dry brakes. Drying can be improved by moving
your vehicle slowly while applying light pressure on the brake pedal.
Be cautious of sudden changes in vehicle speed or direction when you
are driving in mud. Even 4WD vehicles can lose traction in slick mud. As
when you are driving over sand, apply the accelerator slowly and avoid
spinning your wheels. If the vehicle does slide, steer in the direction of
the slide until you regain control of the vehicle.
vehicle as effectively as dry brakes. Drying can be improved by moving
your vehicle slowly while applying light pressure on the brake pedal.
Be cautious of sudden changes in vehicle speed or direction when you
are driving in mud. Even 4WD vehicles can lose traction in slick mud. As
when you are driving over sand, apply the accelerator slowly and avoid
spinning your wheels. If the vehicle does slide, steer in the direction of
the slide until you regain control of the vehicle.
If the transmission, transfer case or front axle are submerged in water,
their fluids should be checked and changed, if necessary.