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my differential is getting on my nerves and whines every time you get off the gas. On top of that, I can move both rear wheels about 1-2 mm inwards (causing a "clonk clonk" when doing so). So I am seeing to replace the bearing.
Thing is, the bearings cost about €360/side! Just for a bearing with a seal on it. On the X300 and XJ40, the bearings can be sourced from external companies. Does anyone know about that with the X308 bearings? Who makes them and does anyone have a cheaper (I'm no cheapskate, a new used diff would cost me €150-200 so I'm trying to avoid removing my diff but would do so if the parts aren't available for less than €100) source?
Sadly the output shaft bearings on the 15hu are somewhat unique size wise: extra wide(29mm) single roller deep grove bearing. The SKF # is BB1B 1862021 B
I bought bearings a while ago for under $100 US each, with the increases in price i suspect SKF no longer produces them.
Have you got any other pictures of the bearing as is? I'm searching for some "generic" ones and have a whole list of them but it depends on what I can expect
The dimensions are: 29mm wide, 35mm inner dia, 72mm outer dia. Single ball deep groove. One side has a seal and faces the center of the bearing, the other side (outer) has a shield. Shield side has o ring grove cut into outside of bearing. Some pics:
I still have the old bearings at the shop if you need more pictures.
It is a hard job finding some matching parts. They are so specific. I can find some roller bearings instead... But they aren't the best when it comes to thrust and co... And I doubt they have the matching gap for the clip to go into...
Duel row tapered or duel row angular contact ball would be my choices for a potential replacement. With out knowing the load specs for the original choosing the right size would be alot more difficult. Chances are good you would have to machine the output holder to accommodate a larger and wider bearing. I am not a huge fan of re-inventing the wheel but the current bearing prices are totally insane.
I assume it is possible to use say some roller bearings but then the sideway forces would probably kill it... I think I'll just stick with a used diff.
I assume it is possible to use say some roller bearings but then the sideway forces would probably kill it... I think I'll just stick with a used diff.
Don't waste time and energy chasing generic bearings.
Get the right ones from British Spares. ;o]
My driver's side shaft bearing's toast. I'm going to replace the whole shaft. Instead of rolling the dice w/ a used unit, I'm looking for a rebuilt piece w/ fresh bearings.
Thanks
Last edited by King Charles; 05-28-2018 at 12:00 PM.
The output shaft bearings are NLA, that's why they cost hundreds of dollars per side from places that still carry them. I spent a lot of time looking into this, even contacted SKF USA and they said that the part number came up for SKF Italy, and they never followed up after that... The bearing PN doesn't come up with much when searched online except a database result and a few Jaguar forums threads.
SNG Barratt sells aftermarket replacements which are a 27mm wide bearing plus custom 2mm shims to keep spacing identical. This seems to be the only solution aside from overpaying for NLA parts, since the 72x35x27 is a standard bearing size. If looking at the OEM bearing disassembled, you can see the outside facing shield is extended 2mm past where it would if the bearings were centered. FWIW the bearing is actually double sealed, with a shield on top of the seal on the outisde, and I believe that combined with the surface for the O-ring adds to that extra 2mm.
Maybe it's worth contacting diff specialist shops or something if anyone happens to know a backroad or B2B-only vendor that sells the OE bearings?
I managed to find some used ones at a junkyard with acceptable play in them, and it saved me the effort of having to disassemble and press together the stubs. One of my worn ones is now taken apart (no shields or seals), flushed out, and sits as a paperweight on my desk.
The output shaft bearings are NLA, that's why they cost hundreds of dollars per side from places that still carry them. I spent a lot of time looking into this, even contacted SKF USA and they said that the part number came up for SKF Italy, and they never followed up after that... The bearing PN doesn't come up with much when searched online except a database result and a few Jaguar forums threads.
SNG Barratt sells aftermarket replacements which are a 27mm wide bearing plus custom 2mm shims to keep spacing identical. This seems to be the only solution aside from overpaying for NLA parts, since the 72x35x27 is a standard bearing size. If looking at the OEM bearing disassembled, you can see the outside facing shield is extended 2mm past where it would if the bearings were centered. FWIW the bearing is actually double sealed, with a shield on top of the seal on the outisde, and I believe that combined with the surface for the O-ring adds to that extra 2mm.
Maybe it's worth contacting diff specialist shops or something if anyone happens to know a backroad or B2B-only vendor that sells the OE bearings?
I managed to find some used ones at a junkyard with acceptable play in them, and it saved me the effort of having to disassemble and press together the stubs. One of my worn ones is now taken apart (no shields or seals), flushed out, and sits as a paperweight on my desk.
Yes it's cheaper to source the whole shaft these days. To find them new is also a task. I'd hate to go through having both output shafts replaced w/ one new,one used then having the used one fail rendering another rear end repair.
Last edited by King Charles; 05-28-2018 at 07:50 PM.
08-21-2015, 04:39 AM
Differential bearings (output shafts)
