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Oil leaking from rear

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07 Sep 2026 17:17 - 07 Sep 2026 17:22 #265216 by davidandped
My JB74 has been making a popping sound from the rear for a few weeks now. Thought I’d check underneath today and oil was peeing out of the rear, I’ve taken a video and tried to attach it to this post if anyone can advise me how to fix it! Thanks 

youtube.com/shorts/GpsFabEQa1k?is=nseWSBv-NdcQCLKN
Last edit: 07 Sep 2026 17:22 by davidandped.

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07 Sep 2026 17:34 #265217 by fordem
Replied by fordem on topic Oil leaking from rear
That liquid looks a little too thin to be gear oil, I'd suggest you check the brake fluid reservoir ASAP.
The following user(s) said Thank You: davidandped

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07 Sep 2026 18:34 #265218 by mlines
Replied by mlines on topic Oil leaking from rear
I agree it looks thin for diff oil but with that much leaking there would be no brakes already

I would go for a diff that is full of water and oil, have you been wading it?

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
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07 Sep 2026 18:44 #265219 by davidandped
Replied by davidandped on topic Oil leaking from rear
No, haven’t been off-road in it since the Big Jimmy meet, I did change the diff oil a few weeks ago and it was as clean as a whistle

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08 Sep 2026 07:50 #265223 by yakuza
Replied by yakuza on topic Oil leaking from rear
Smell and feel the oil on your fingers, brake fluid is less lubricative if that is a word.
You may have leftovers from your gear oil change and can smell/feel if it is the same?
And/or smell/feel the brake fluid in the reservoir?

(I did not suggest "taste" here thank god.. :) )

Norway -84 SJ410, 87 SJ413 lwb, 88 sammy trailer.
2005 Jimny M16A VVT, 235 Cooper Disco, 2" Trailmaster, ARB rear lck.

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08 Sep 2026 09:42 #265225 by Lambert
Replied by Lambert on topic Oil leaking from rear
Check that the breather on top of the axle is free and the level is correct. It could be a blocked breather is pushing oil past the shaft seal?

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