Ahhh! Rear Differential problem H.e.l.p!!
#41
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My pinion seal is gone again after 35k km (slight leak). First one lasted to 105k but I suspect it was leaking long before I changed it (bought the car at 54k km). I guess I dodged a bullet driving around with low fluid for such a long time (before I changed it the first time). Looking at the cost of new diffs has me maniacal about checking the gear oil fluid level. I'll take a $300 seal replacement every couple years all day every day over a $10k new diff. I guess the quaflife diff is a good cheaper alternative in that situation however.
#42
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the reason i ask is because sometimes i feel a rumbling in the steering wheel when im turning from a stop sign at low speeds. kinda feels like im driving on gravel
#43
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Sorry to be the bearer of bad news, but that sounds like your diff to me. And I've had mine replaced so I know the feeling in this car. It's caused by the clutch packs not allowing the wheels turn at different speeds.
#44
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oh f**k me
what other tests can I do to determine? does it have to be 100% replaced or can it be salvaged if its not too bad.
also, would it be considered under powertrain? the dealership i purchased from gave me a 1000 mile powertrain warranty. (which i think i just finished)
what other tests can I do to determine? does it have to be 100% replaced or can it be salvaged if its not too bad.
also, would it be considered under powertrain? the dealership i purchased from gave me a 1000 mile powertrain warranty. (which i think i just finished)
Last edited by carzaddict; 09-04-2016 at 02:08 PM.
#45
#46
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Wait really? I have this vibration in the steering wheel also, when turning at low speeds.. Galpin dealership said they have quite few come in with same problem and there's not much they can do about it but never mentioned rear diff.. Another mechanic said its nothing and I think I have a thread on here were others said it doesn't sound like a rear diff issue?
#47
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i recently changed my tires and i dont feel it a lot anymore. i feel it SLIGHTLY but not so much. actually i feel it when the car is still warming up. after ive driven it for a bit i dont feel it as much.
im trying to remember, i think i felt the same on my 09 XF...which wasnt supercharged, had the 4.2 V8 engine.
im trying to remember, i think i felt the same on my 09 XF...which wasnt supercharged, had the 4.2 V8 engine.
#48
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A characteristic of some XFs is a thing called "tyre (or tire) slip", and that may be what you are experiencing, see here: Creek on full lock
#49
#50
#51
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when i was getting my tires changed, the mechanic spun one wheel and the opposite wheel spun the other way as it was supposed to....so i guess the diff cant be that bad?
but for sure when i turn a corner from a complete stop, at almost full lock...i feel something weird and i end up chirping the tires because then i give it a little too much gas.
#52
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Does anyone have a listing of all parts required when fitting a new quaife diff? Is it basically just the diff plus all new seals or is there more hardware required. I think I'll replace my pinion/output seals one more time and just keep topping up the diff at specific intervals until it starts to whine, then shell out the $$$ for a new diff
#53
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Does anyone have a listing of all parts required when fitting a new quaife diff? Is it basically just the diff plus all new seals or is there more hardware required. I think I'll replace my pinion/output seals one more time and just keep topping up the diff at specific intervals until it starts to whine, then shell out the $$$ for a new diff
Differential Rear Buy Spares for Jaguar XF (Differentials and Parts)
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#54
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Does anyone have a listing of all parts required when fitting a new quaife diff? Is it basically just the diff plus all new seals or is there more hardware required. I think I'll replace my pinion/output seals one more time and just keep topping up the diff at specific intervals until it starts to whine, then shell out the $$$ for a new diff
#55
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Also how did you wind up sorting out your diff issue? Mine goes in for new seals on Thursday and I'm hoping that at least buys me a bit of time....
#57
#58
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When you say serviceable diff I'm not totally sure what you mean. I thought it was a matter of taking the old diff out of the case and putting the new quaife diff in. Am I off base here?
Also how did you wind up sorting out your diff issue? Mine goes in for new seals on Thursday and I'm hoping that at least buys me a bit of time....
Also how did you wind up sorting out your diff issue? Mine goes in for new seals on Thursday and I'm hoping that at least buys me a bit of time....
Here's the reply I got from Martin Slade from Quaife:
"It’s entirely possible the QDf3W will be the right ATB unit for your car, although it’s hard to be 100 per cent certain. If you could send some photos of you diff, it may help. Please bear in mind that this a LSD upgrade for an “normal” diff and relies on the original unit being serviceable. If, for example, your crown wheel and pinion are worn or damaged, this will be no benefit at all, as these parts need to be transferred, so it’s important to understand just how your unit has failed. There are no installation guides as this is not a serviceable item in jaguars eyes, however most transmission specialist can fit them successfully using their experience. We’ve sold dozens around the work so I’m sure it’s entirely do-able.
Shipping to your part of the world will be circa £ 100 to $120, I can be more precise if you can forward a shipping address
Please let me know if I can help further
Best wishes
Martin"
In the end my issue turned out to be a bad wheel bearing, not the diff, phew! I've now done 2 fluid swaps and have my fingers crossed.
#59
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I don't have any personal experience with this, with my XF, but I just happened to be reading through this discussion. HOWEVER, your description of the condition sounds a lot like what a GM limited slip differential does, when the incorrect lubricant is in the rear axle.
GM "positraction" axles use a gear oil with a special friction modifier in the oil, which allows the LSD clutches to slip, IN A SPECIFIC AMOUNT. Too much of this additive allows the clutches to slip too much, so the LSD doesn't "lock up" enough, so one wheel drives, one wheel doesn't. Too little, and the clutches lock up too tightly, when turning, so the clutches "chatter".
I wonder if a change of gear oil, to something like the GM spec fluid, at the proper fill level for the diff, would fix the problem.
Just throwing that out there...........
#60
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Here's the reply I got from Martin Slade from Quaife:
"It’s entirely possible the QDf3W will be the right ATB unit for your car, although it’s hard to be 100 per cent certain. If you could send some photos of you diff, it may help. Please bear in mind that this a LSD upgrade for an “normal” diff and relies on the original unit being serviceable. If, for example, your crown wheel and pinion are worn or damaged, this will be no benefit at all, as these parts need to be transferred, so it’s important to understand just how your unit has failed. There are no installation guides as this is not a serviceable item in jaguars eyes, however most transmission specialist can fit them successfully using their experience. We’ve sold dozens around the work so I’m sure it’s entirely do-able.
Shipping to your part of the world will be circa £ 100 to $120, I can be more precise if you can forward a shipping address
Please let me know if I can help further
Best wishes
Martin"
In the end my issue turned out to be a bad wheel bearing, not the diff, phew! I've now done 2 fluid swaps and have my fingers crossed.
"It’s entirely possible the QDf3W will be the right ATB unit for your car, although it’s hard to be 100 per cent certain. If you could send some photos of you diff, it may help. Please bear in mind that this a LSD upgrade for an “normal” diff and relies on the original unit being serviceable. If, for example, your crown wheel and pinion are worn or damaged, this will be no benefit at all, as these parts need to be transferred, so it’s important to understand just how your unit has failed. There are no installation guides as this is not a serviceable item in jaguars eyes, however most transmission specialist can fit them successfully using their experience. We’ve sold dozens around the work so I’m sure it’s entirely do-able.
Shipping to your part of the world will be circa £ 100 to $120, I can be more precise if you can forward a shipping address
Please let me know if I can help further
Best wishes
Martin"
In the end my issue turned out to be a bad wheel bearing, not the diff, phew! I've now done 2 fluid swaps and have my fingers crossed.
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