1996 BMW Z3 4 cyl Two Wheel Drive Manual 207Kkm miles
Started a few months ago, I like to engage clutch in neutral at traffic stops, etc to reduce TOB wear. Now rattling, clunky sound. I can also create kind of a clacking whack sound if I slightly jerk the clutch in and out, loading and unloading the tranny.
I see lots of forum talk about neutral rollover, getrag typical, etc. I don't believe it mainly because it is a new sound.
I pulled the transmission to put in new clutch kit - everything looks good except significant lateral play at the end of transmission input shaft. Wacking with the heeel of my hand, I swear that is the kind of sound I was hearing. Front pilot bearing seems very good, clutch disc is a bit rattly & loose, but lots of meat on it. I don't mind changing out the clutch (I have an upgrade conversion kit - to single mass flywheel) but I sure don't want to put all of this back together to have same problem.
I suspect (hope) I just need to replace input shaft main bearing and seal, but there is also an inner race bearing (tapered?) Per the BMW parts picture I have. I can't find any proper exploded view of this tranny, I've never been inside a transmission before. Anything more than the input shaft bearings may be more than I can handle properly.
I pulled the bolts to separate the front bell housing from the main gearbox, won't separate. There's a couple of Torx head bolts and one allen head bolt that look to hold internal linkages or such, they look like they may span the separation line. - If I pull these do I drop stuff inside and get into a real jam?
Any help, a proper diagram for the exact xmission would be REALLY good. Getrag S5D 250G.
Also, the two bearings are like a jillion $ from dealer service dept, they only have uncertain stock in GERMANY, & they are just common bearings - if I knew cross ref or something.
Oh yeah, the output shaft seems real tight, no end play or lateral play.
Everything is dry at both seals and within clutch compartment.
And I'm high & dry with my roadster up on blocks in my driveway! The family heirloom 71 Cutlass (don't look or sound like when my grandad bought it!) Is pressed into service as daily driver (and that's not good).
pos - I was quoted
input shaft seal - $44, input shaft main bearing $105, input shaft roller bearing $14 (same & more for output shaft items). Holy smokes! Save me money on this adventure & you bet I'll donate!
Sunday, September 5th, 2010 AT 2:24 AM