MOVED rear end gear oil - Page 2 - IMBOC
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post #16 of 30 (permalink) Old 07-06-2010, 10:21 PM
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Quote:
Originally Posted by MustangLynda
I just had my car serviced (starter died, stranded me 127 miles from home, but hey, that's ok...grrr!!) and they did the multipoint inspection thing. I was looking at the paperwork and it was recommended I change the fuel filter, well ok, but also that the rear differential fluid was found to be dirty/contaminated and needs to be changed. Huh? I found it in the paperwork - they never said anything or tried to sell me the services but somehow I find this hard to believe, at 33K miles???
Lynda,

Change BOTH of them.

I have already done that at 23,000 Miles.

The Fuel Filter at 16,000 Miles.

Just changed the Rear End Fluid & Modifier last week at 23,000 Miles. (Thats Twice for that)

Terry
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post #17 of 30 (permalink) Old 07-07-2010, 02:12 AM

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Quote:
Originally Posted by greygearhead
The latest Mobil 1 75w-140 LS has has a friction modifier already added.
So does the AMSOIL.

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post #18 of 30 (permalink) Old 07-08-2010, 07:14 PM

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Quote:
Originally Posted by tigerhonaker
Lynda,

Change BOTH of them.

I have already done that at 23,000 Miles.

The Fuel Filter at 16,000 Miles.

Just changed the Rear End Fluid & Modifier last week at 23,000 Miles. (Thats Twice for that)

Terry
Ok, I'll do it then. Next oil change. Thanks Terry!
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post #19 of 30 (permalink) Old 07-08-2010, 07:21 PM
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Quote:
Originally Posted by MustangLynda
Ok, I'll do it then. Next oil change. Thanks Terry!
Lynda,

Go to your Ford Dealer of your choice and use All Ford Products for the Change.

I went back to Ford Products this last time as I had some (Noise) in mine when turning Sharp into my Garage.

No-Noise now !!!

Terry
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post #20 of 30 (permalink) Old 08-07-2010, 08:50 AM

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I change diff fluid to Amsoil at 15K....as far as I'm concerned its filled for life.
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post #21 of 30 (permalink) Old 08-07-2010, 12:23 PM

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Just as an FYI - I took my car to the local dealer to have the rear end gear oil changed. They said "huh?, why, it's good for 100K". I told them the other dealer said it was dirty so they checked it anyway. They said it was totally clear and there was no reason to change it. Hm.

Aside from that I paid $71 !!!!! to have the fuel filter changed! Geesh that seems like a lot
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post #22 of 30 (permalink) Old 08-07-2010, 12:42 PM
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Quote:
Originally Posted by Shlade
Sorry to hi-jack your thread! But how often should I change the rear end oil in my Bullitt?

Depends on how you use the car.
Normal road/daily driver.....25-50k should be fine.
But if you race...you need to change it WAY MORE often!
Rear end lube is typically the lost and forgotten maintenance item.

Even one day on the track can burn up your fluid.
If I spend a good day on a road course, I change it out.

And never add new fluid without the FM...that is the fastest way to burn out your clutch pack.
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post #23 of 30 (permalink) Old 08-21-2010, 01:40 PM Thread Starter

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as i understand,friction modifier is so the clutches can slide easier when turning and have less wear on the friction plates..it doesnt make them stick better...
just what i heard.


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post #24 of 30 (permalink) Old 08-22-2010, 04:57 PM

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Quote:
Originally Posted by crow magnum
as i understand,friction modifier is so the clutches can slide easier when turning and have less wear on the friction plates..it doesnt make them stick better...
just what i heard.
Yep thats the way it works!

Gene
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post #25 of 30 (permalink) Old 08-23-2010, 03:16 PM Thread Starter

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see i can be tactful just like tiger...lol


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post #26 of 30 (permalink) Old 08-23-2010, 07:10 PM
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Quote:
Originally Posted by crow magnum
see i can be tactful just like tiger...lol




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post #27 of 30 (permalink) Old 10-08-2010, 10:39 AM

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I went with Amsoil and modifier for the diff..no problems 6000 miles ago.
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post #28 of 30 (permalink) Old 06-13-2018, 05:54 PM

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so you are running amsoil 75-145 and the fr modifyr?
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post #29 of 30 (permalink) Old 04-02-2019, 08:13 PM

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so do i need 2 or 3 quarts of gear lube?? anyone /
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post #30 of 30 (permalink) Old 04-02-2019, 08:24 PM
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It takes 2+ quarts and the friction modifier. I'd stick with the Motorcraft 75W140 and friction additive. Warm up the gear oil to make it easier to pour or add with an oil pump.
If you don't use the friction additive the limited slip diff. clutches will chatter turning corners. It's a messy job unless you already have a diff. cover with a drain. Good luck.


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