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Changing diff oil

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10 Sep 2020 09:09 #228022 by Reason2doubt
I’m thinking about changing my diff plugs and oil as part of a larger home service. I have new plugs bought from Martin on BigJimny (about a year ago).

Is there any technique to getting the plugs out? It seemed like they were stuck solid when I last tried. Any recommendation on how to best loosen them up?

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10 Sep 2020 09:18 #228023 by jackonlyjack
Replied by jackonlyjack on topic Changing diff oil
I take it you have the 10mm square socket ?
Filler plug can be removed with good set of mole grips or stilsons wrench
You could use heat but you may have a nylon washer on it
Drain plug use heat or weld a nut to it

I use a 500mm long ratchet

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10 Sep 2020 09:23 #228026 by Reason2doubt
Replied by Reason2doubt on topic Changing diff oil
I believe so.. I have a little set of assorted ‘diff keys’ and one of them seemed to fit OK.

I will get some mole grips but I do have a welder (assuming that is the last resort!). I’ll see how I get on.

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10 Sep 2020 09:27 #228027 by Scimike
Replied by Scimike on topic Changing diff oil
I don't recall the job requiring any special tools.
Remove the filler plug first, then the drain plug. Simply if you remove the drain first and can't get the filler out you are stuck.
I used a little heat on the diff housing, just got it warm, they then came out easily.
Can't recall a nylon washer, but I use blue hylomar as a thread sealant on these jobs, always works for me.
Mike

Yokohama Geolanders, Sony 2D head unit, Elvis Bobblehead, Jimnybits transfer Guard, Hand crafted Indian hanging Elephant, Koni Heavy track dampers, Voodoo Doll with pins (active spell - I believe it's working), Jimnybits Adventure Rack, towbar, Light bar and vintage caravan.

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10 Sep 2020 09:34 #228029 by jackonlyjack
Replied by jackonlyjack on topic Changing diff oil
Yes welding a nut on is last resort
Nylon washer some do some don't,my rear has one but front doesn't
Like Scimike say's small amount of sealant i use an rtv type

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10 Sep 2020 09:48 #228030 by mlines
Replied by mlines on topic Changing diff oil
The proper washer is copper

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
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10 Sep 2020 13:11 #228039 by HUN
Replied by HUN on topic Changing diff oil
And the 'proper' filler plug is not a factory one but rather something like the one on the right.

No more welding a nut for me.

TrailMaster 2" lift kit
JB rear disk brake conversion, all guards, recovery points & battery tray
ORE transfer box HD brackets
T-Max split charge system
X-Shock Dakar ceramic clutch kit & roof rack
Flo-Flex castor polybushes
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Push-fit breathers
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19 Sep 2020 19:56 #228351 by Podge
Replied by Podge on topic Changing diff oil

I believe so.. I have a little set of assorted ‘diff keys’ and one of them seemed to fit OK.

I will get some mole grips but I do have a welder (assuming that is the last resort!). I’ll see how I get on.


Just to say that a 3/8ths drain key will seem like it's a good fit but it's actually 9.5mm instead of 10mm, probably wont make a difference but if they're effing tight it might. I've never seen a 10mm in a set, I've had to buy them separately.

2000 M13A Jimny with hammerite wheels - Ireland :)
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