Irrelevant Posted March 6, 2009 Share Posted March 6, 2009 Looks like it could be made to fit into a Caterham chassis pretty well . .. It's a BMW diff from a Z4. The ratios come in pretty much any size you can think of(c.2.9 to c.4.5 or something) and they some come with an LSD(which would need fettling I guess, but still). Sure, it would need different driveshafts and prop and maybe some brackets brased on, but it would solve the problems with the new Quaife diffs and make tracking down 3.14:1 ratio Sierra diffs a thing of the past for people with BECs. Anyone seen one of these in the flesh. They look pretty compact but how big are they compared to a Sierra diff? Any idea on weight? Link to comment Share on other sites More sharing options...
Mickrick Posted March 6, 2009 Share Posted March 6, 2009 but it would solve the problems with the new Quaife diffs What problems? Link to comment Share on other sites More sharing options...
Irrelevant Posted March 6, 2009 Author Share Posted March 6, 2009 What problems? Â These problems . .. Link to comment Share on other sites More sharing options...
taffyracer Posted March 6, 2009 Share Posted March 6, 2009 Yes I have, I am an official dealer for TMS products, superb stuff, but there are many people in the UK that can fettle those diffs, I know of 3 or 4 that i could turn to for BMW diffs http://www.xlraceparts.com Link to comment Share on other sites More sharing options...
Mark Durrant Posted March 6, 2009 Share Posted March 6, 2009 Why not use the new diff from Titan Mark D Comp Sec  Link to comment Share on other sites More sharing options...
Irrelevant Posted March 6, 2009 Author Share Posted March 6, 2009 Mark: I was thinking about the diff unit itself rather than LSD unit. Want a lower ratio one for mine and already have 3.14 . . . just thinking aloud really . . not about to rush out and buy anything at the moment. taffyracer: I just pinched TMS's image . .. I was thinking more of using a used stock diff unit. You got any idea what these diffs weigh and their dimensions compared to a 7" Ford Sierra diff. Link to comment Share on other sites More sharing options...
Mickrick Posted March 6, 2009 Share Posted March 6, 2009 Ah, I see. Mine was noisy, but I thought that was normal. I seem to remember seeing a diff made by these people May be worth an enquirey. Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 6, 2009 Share Posted March 6, 2009 Adam, the problem wasn't with the Quaiffe diffs. As I understood from the many many times mine has been replaced, they are made elsewhere, as I was told for my last swap that the one they put in was Quaiffe built. The latest one is much much nicer. Tarnish the good name of Quaiffe... tut tut  John _________________________ Bugsy: '82 2cv6 (Back on the road!!! 😬) Talloulah: '08 1.6K Classic (Grubby ) Edited by - myothercarsa2cv on 6 Mar 2009 16:49:05 Link to comment Share on other sites More sharing options...
The Pikey Posted March 6, 2009 Share Posted March 6, 2009 I've seen a Quaife CW&P that had done a few miles (but not that many as it was only 6 months old) and you could see steps where the teeth had been meshing. I think Quaife out source the gears to a Italian company which is strange because making gears is what Quaife do  jason C7 8USA Link to comment Share on other sites More sharing options...
Irrelevant Posted March 6, 2009 Author Share Posted March 6, 2009 Tarnish the good name of Quaiffe... tut tut I have a Quaife reverse box that doesn't any more . . . but that's another matter Link to comment Share on other sites More sharing options...
RiF Posted March 6, 2009 Share Posted March 6, 2009 The French were using BMW diffs 6 years ago in sevens. Not sure which version RiF Driving one of the first Duratec 7, and building CA07BON for Henrietta 😬 😬 😬.for pictures of 7 and carbon andCA07BON Link to comment Share on other sites More sharing options...
taffyracer Posted March 6, 2009 Share Posted March 6, 2009 To be honest i'm not sure what the ford sierra diff weighs, anyone? The best one if you were going to use a BMW one would be the E36 3.0 M3 case with E46 internals, fettled of course, my E36 had the best diff ever, saved me many many times http://www.xlraceparts.com Link to comment Share on other sites More sharing options...
rj Posted March 6, 2009 Share Posted March 6, 2009 The Sierra diff weighs about 20.5kgs open. Add 1.5 if it has a ZF LSD Link to comment Share on other sites More sharing options...
Irrelevant Posted March 7, 2009 Author Share Posted March 7, 2009 myothercarsa2cv: So the Quaife supplied diffs were failing because Quaife outsourced the gear production to some tin-pot outfit in Italy. After various warranty replacements, Quaife got their act together and brought the gear production back in house and all's OK now? That correct? The French were using BMW diffs 6 years ago in sevens. Funny how often ideas are rarely new . . .if it's worth doing, as often as not, someone's already done it. Anyone got any leads on someone who's actually fitted a BMW diff please? Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 7, 2009 Share Posted March 7, 2009 Adam, to be honest I have no idea. The first three diffs I got from Caterham were carp, and the fourth was amazing. That was the one they said was a Quaiffe built one so should be good. So I'm assuming the others weren't Quaiffe built? John _________________________ Bugsy: '82 2cv6 (Back on the road!!! 😬) Talloulah: '08 1.6K Classic (Grubby ) Link to comment Share on other sites More sharing options...
taffyracer Posted March 7, 2009 Share Posted March 7, 2009 are there any marking on the casing that identify exactly what type and ratio? http://www.xlraceparts.com Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 7, 2009 Share Posted March 7, 2009 Cor. That means getting under the car and looking... Will have a shufti when I get a chance. John _________________________ Bugsy: '82 2cv6 (Back on the road!!! 😬) Talloulah: '08 1.6K Classic (Grubby ) Link to comment Share on other sites More sharing options...
The Pikey Posted March 7, 2009 Share Posted March 7, 2009 are there any marking on the casing that identify exactly what type and ratio?  The original Sierra ones had a tin tag held on by one of the back plate bolts and this gave ratio and if it was open or lsd. When they are reconed for CC the tag is removed. Jason C7 8USA Link to comment Share on other sites More sharing options...
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