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Old 12-17-2008, 10:31 PM   #1 (permalink)
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Default Front Differential Fluid Change

I am in the need of replacing both of my diff's fluid very soon. I seen a post in the DIY for fluid repacement that I am assuming is for the H6. Can anyone tell me how different the front diff fluid replacement is for an h6 than for a h4. For starters where is the dipstick, is it still under the airbox. Any help would be appreciated.
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Old 12-18-2008, 06:37 AM   #2 (permalink)
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I'll assume it's an auto trans. The dipstick is in the same place, right side under the wire harness with the 3 connectors where the engine and trans mate. No difference between H6 and H4 that I can see.
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Old 12-21-2008, 07:25 PM   #3 (permalink)
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Default Diff fluid change

So when I was under my car doing my trans fluid change I found the dipstick for the front diff. I know you are thinking how did you find it from underneath but could not find it from above, I guess the light just caught it the right way and I happened to see it. I am assuming that to fill the front diff you fill it through the dipstick hole like filling the transmission fluid if not please let me know. I noticed that the front diff has what looks like a torx bolt, anyone know what size it is. Also to take out the bolt to drain the back diff is it best just to use a 3/4 ratchet with no socket on it or is there a proper tool to do this?
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Old 12-21-2008, 08:09 PM   #4 (permalink)
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Front diff -- drain from the bottom -- the Torx is a T70 -- fill from the top with a long reach funnel. There's either a copper or steel washer under the bolt.

Rear diff -- is that the one with the plug that has the recessed square fitting? If so, a 1/2 inch drive should work. Those fittings are usually in tight and unless the car is raised, it can be difficult to get enough leverage to break the bond, even with a longer breaker bar. Whatever you do, make sure you loosen the upper fill plug first so you know you will be able to refill, before taking out the lower drain plug.
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Old 05-11-2010, 07:35 PM   #5 (permalink)
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does anyone know the size of the plug i need to replace it the torx is stripped? any thoughts on getting it out
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Old 04-09-2014, 05:59 PM   #6 (permalink)
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Quote:
Originally Posted by plain OM View Post
(...)Whatever you do, make sure you loosen the upper fill plug first so you know you will be able to refill, before taking out the lower drain plug.
VERY, VERY WISE ADVICE!!!

ALWAYS THINK TWICE OR TRICE, BEFORE YOU START DOING ANYTHING ON YOUR VALUABLE MACHINE!

I would not like to read complains by gentlemen, who do not know, where front differential is located, and recklessly fill it up with transmission oil!
For such folks I have the only recommendation - go to the shop, pay, whatever they want, and take receipt!!!

BE AWARE, WHAT YOU ARE DOING, AND DO IT ONCE ONLY!!!
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