Thread: Differential Fluid - How to change?

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  1. #1
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    Default Differential Fluid - How to change?

    What's involved in changing the differential fluid? Step-by-step instructions appreciated

  2. #2
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    Default Re: Differential Fluid - How to change?

    Very carefully 8-))))))

    Hey man,,,,,,

  3. #3
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    Default Re: Differential Fluid - How to change?

    Easy
    - Put car on lift or pay $10-$15 to rent Quicklube bay
    - Remove plug with 3/8" hex allen male socket
    - Many tools for this step but I used a $10 fluid pump bought at Autozone, looks like a bike pump
    - Need two people with my tool, one inserts end into hole and moves all around while the other pumps like crazy
    - Refill with 4oz additive
    - Fill to top with about 40 oz of Mopar gear lube
    - Tighten, I think 140 "inch" pounds

  4. #4
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    Default Re: Differential Fluid - How to change?

    Easy
    - Need two people with my tool, one inserts end into hole and moves all around while the other pumps like crazy


  5. #5
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    Default Re: Differential Fluid - How to change?

    Easy
    - Need two people with my tool, one inserts end into hole and moves all around while the other pumps like crazy


    LOL!

  6. #6
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    Default Re: Differential Fluid - How to change?

    Easy
    - Put car on lift or pay $10-$15 to rent Quicklube bay
    - Remove plug with 3/8" hex allen male socket
    - Many tools for this step but I used a $10 fluid pump bought at Autozone, looks like a bike pump
    - Need two people with my tool, one inserts end into hole and moves all around while the other pumps like crazy
    - Refill with 4oz additive
    - Fill to top with about 40 oz of Mopar gear lube
    - Tighten, I think 140 "inch" pounds
    Few followups:
    1. Rather than a lift, how about just jacking up the car?
    2. Tell me more about your...tool
    3. What lets you know you got to 140 in-lbs?

  7. #7
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    Default Re: Differential Fluid - How to change?

    Very carefully 8-))))))

    Hey man,,,,,,
    Thanks! Still need to catch up again sometime...

  8. #8
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    Default Re: Differential Fluid - How to change?

    3. What lets you know you got to 140 in-lbs?
    You need a torque wrench in inch-lbs. They are usually made with 3/8" drive. Or you can convert by a factor of 12, for example:

    10 lbs/ft of torque is 120 lb/inches

    So for 140 lb/in, you have 11.67 lb/ft which is normally smaller than what is listed on most torque wrenches which are calibrated in lb/ft.

  9. #9
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    Default Re: Differential Fluid - How to change?

    Yes, you can do it by jacking up the car. I remove the passenger side rear wheel just so I have more room. Not required though.

    I use a vaccula brake bleeder to suck the fluid out. You'll need a compressor if you use this type of tool.

    It's also convenient to have a long "fill tube" about 4 ft X 1/2 inch O.D. with a funnel on one end. Diff fluid is very thick and takes several minutes to fill.

  10. #10
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    Default Re: Differential Fluid - How to change?

    Thanks for all the info. Exactly where is the plug located? Directions from the rear please

  11. #11
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    Default Re: Differential Fluid - How to change?

    Passenger side. There might be a little plastic tag on it.

  12. #12
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    Default Re: Differential Fluid - How to change?

    I had the drill and install of a drainplug done by archer at VIR. Makes it an easy job then.
    Details in the how to section also.

  13. #13
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    Default Re: Differential Fluid - How to change?

    Here's a tip. Make sure the rear is good and hot before you try to suck the fluid out.
    Drive it for half an hour.

  14. #14
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    Default Re: Differential Fluid - How to change?

    Here's a tip. Make sure the rear is good and hot before you try to suck the fluid out.
    Drive it for half an hour.
    Er...you mean the car?

  15. #15
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    Default Re: Differential Fluid - How to change?

    I had the drill and install of a drainplug done by archer at VIR. Makes it an easy job then.
    Details in the how to section also.
    Yeah, I'd like to have had that done, a bit more than I'm willing to try myself though

  16. #16
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    Default Re: Differential Fluid - How to change?

    Might think about doing it next year if you go to VIR, Archer was VERY reasonable.

    Hey did you get your car inspected?

  17. #17
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    Default Re: Differential Fluid - How to change?

    I put mine on jacks & removed the wheels for easy access; washed them while I was at it. I didn't drive mine to heat it up & used the cheapo $10 pump from autozone for drain & fill. 1 bottle of additive & 1.5 quarts of gear oil back in. Took about an hour from 123go. Didn't use a torque wrench either; just rednecked it like Grandpa taught me long ago. You have to hold your tongue just right. (don't overtighten, just snug it & turn it a little past like your oil filter)

  18. #18
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    Default Re: Differential Fluid - How to change?

    Might think about doing it next year if you go to VIR, Archer was VERY reasonable.

    Hey did you get your car inspected?
    Thanks for the info.

    Yep, got it inspected at a random facility...

  19. #19
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    Default Re: Differential Fluid - How to change?

    I put mine on jacks & removed the wheels for easy access; washed them while I was at it. I didn't drive mine to heat it up & used the cheapo $10 pump from autozone for drain & fill. 1 bottle of additive & 1.5 quarts of gear oil back in. Took about an hour from 123go. Didn't use a torque wrench either; just rednecked it like Grandpa taught me long ago. You have to hold your tongue just right. (don't overtighten, just snug it & turn it a little past like your oil filter)
    Thanks for the info, think I'll "neck" it too

    Are the fluid & additive just best to get through the dealership/MOPAR?

  20. #20
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    Default Re: Differential Fluid - How to change?

    Torque specs for bolts you can't get to are listed to give you an idea of how much to tighten. "Redneckin'" it like BM's grandpa is fine.

  21. #21
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    Default Re: Differential Fluid - How to change?

    Mopar fluids are fine; get 2 quarts of lube & 1 bottle of additive from the dealer. Put the additive in first.

  22. #22
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    Default Re: Differential Fluid - How to change?

    Can someone provide a fairly precise location of the plug?

  23. #23
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    Default Re: Differential Fluid - How to change?

    Can someone provide a fairly precise location of the plug?
    Jeeze Slaughter, crawl under the car and find the damm thing. It's on the passenger side half way up the diff, forward of the axle, it takes an allen wrench. There are no other plugs you can confuse it with. One more question about it any you're buying wings next time.

  24. #24
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    Default Re: Differential Fluid - How to change?

    Can someone provide a fairly precise location of the plug?
    Jeeze Slaughter, crawl under the car and find the damm thing. It's on the passenger side half way up the diff, forward of the axle, it takes an allen wrench. There are no other plugs you can confuse it with. One more question about it any you're buying wings next time.
    Hey, I bought wings last time?!

    Thanks for the more precise location Now what's an allen wrench? J/K!

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