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Home > Maintenance & Modifications > Rear Diff Oil |
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AndyMc Member Since: 16 Dec 2020 Location: Northampton Posts: 18 |
I changed the diff oil last year soon after I got the car and apart from being a bit dark it was OK. When I was checking the level last week the bit that dribbled out looked creamy. I drained it (700ml) and it looked horrible. I replaced it, then drained again after 15 miles or so - still creamy but not as bad. There is a slight weep from the RH driveshaft seal, but was only enough to dampen the casing - not drip on the drive. I guess if oil can leak out, moisture can get in but surely not very much. The breather hose is attached and looks intact as far as I can see without removing it.
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19th Jun 2022 1:01 pm |
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Andy131 Member Since: 09 Dec 2009 Location: Manchester Posts: 2175 |
OK it's a while since I had a FL2 but water in the differential was never a problem, and I regularly took her wading deeper than the allowed limit.
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19th Jun 2022 2:54 pm |
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AndyMc Member Since: 16 Dec 2020 Location: Northampton Posts: 18 |
Andy thanks. Last time I used Ravenol epx 80w90 gl5 which, according to their website, was suitable. Castrol epx is listed as mineral rather than synthetic as was the ravenol. (I don't know enough to say what the difference between mineral and synthetic matters). Maybe it reacted with whatever was in there previously? But I'll flush it again and see what happens. My worry is I have a 300+ mile run next weekend and don't want to destroy it |
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19th Jun 2022 8:08 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4937 |
I used Smith & Allan GearTech EP 80w90 https://www.smithandallan.com/product/smit...r-oil-4060 Jules |
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20th Jun 2022 6:24 am |
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Just a driver Member Since: 29 Nov 2021 Location: Norfolk Posts: 409 |
I keep following this breather thread as I think that is a problem we have. We was towing the caravan and had lots of oil up the front of caravan. Could not see where it had come from and reading on here we’re waiting for mechanic to have it to look at. |
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20th Jun 2022 2:20 pm |
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AndyMc Member Since: 16 Dec 2020 Location: Northampton Posts: 18 |
Paul, Thanks. I've got some more fluid on order, when it turns up I'll change the fluid again and do as you suggest.
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20th Jun 2022 3:51 pm |
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Nodge68 Member Since: 15 Jul 2020 Location: Newquay Posts: 2071 |
The seal between the diff and Haldex is a labyrinth seal, so if its installed in the correct place, oil or Haldex fluid would drip out the weep hole in the bottom of the casing, which is positioned adjacent to the seal's labyrinth.
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20th Jun 2022 5:42 pm |
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Just a driver Member Since: 29 Nov 2021 Location: Norfolk Posts: 409 |
Our mechanic thinks the reason that the oil came out is may be the bearing in the diff got hot, expanded the oil and causing it to blow out. Is it looking like the diff is on the way out ? |
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21st Jun 2022 6:31 am |
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Nodge68 Member Since: 15 Jul 2020 Location: Newquay Posts: 2071 |
My old diff got very hot before it seized up. However my diff was a replacement, and was empty, not a bit low, but completely empty.
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21st Jun 2022 6:48 am |
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Just a driver Member Since: 29 Nov 2021 Location: Norfolk Posts: 409 |
I am no mechanic, would it be worse for the diff if towing a caravan up and down hills ? And make it throw out oil. |
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21st Jun 2022 8:19 am |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1367 |
The normal failure in the diff for an FL2 is for the under specified nose bearing to fail with a droning from the diff being an early symptom that is easily missed. My diff lasted at least a year before I got it to Bell Engineering and even then it wasn’t definitely diagnosed until Austen took the diff out to check while doing a Haldex service. |
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21st Jun 2022 8:56 am |
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Just a driver Member Since: 29 Nov 2021 Location: Norfolk Posts: 409 |
Thanks, when reading all the problems it’s easy to become paranoid when you’re not a mechanic |
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21st Jun 2022 9:08 am |
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AndyMc Member Since: 16 Dec 2020 Location: Northampton Posts: 18 |
I've checked the breather and its deffinitely attached and intact for its length.
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21st Jun 2022 10:38 am |
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p_gill Member Since: 06 Dec 2011 Location: USA Posts: 1231 |
The differential whips up the oil.
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21st Jun 2022 3:52 pm |
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