series gearbox technical question

Oct 06, 2004 5 Replies
A

whey hey, look at me getting all technical......



ive stripped my series 3 suffix D gearbox and the mainshaft bearing that came off was stamped with 4 circles, i take it this is to denote the bearing is manufactured to extremely tight tolerances,



the new bearing which is a brit part has C3 stamped on. which i take it would relate to 3 circles.



so am i putting an inferior bearing back in, should i get a C4 bearing or doesnt it matter.



hope someone can help me before tommorow as i cant wait to re-build it and stick it in to see if it works ok.



knowing my luck the transfere box will be buggerd.



TIA



andy


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E

C3 is the amount of clearance inside the bearing - C3 is "more than standard" and is normal for gearbox bearings.

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A

but my question was, the one i took out was c4 ( four circles stamped on it ) and the replacement is c3,

will this be a problem?

andy

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E

Shouldn't be - I generally use C3 bearings in gearboxes.

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A

last question for now,

the 3rd 4th synchro has slotted teeth on the inside, these teeth go a;ll the way to one end and stop about 1/4/of an inch or less at the other, which way does it go on the shaft,?

cheers

andy

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A

The end with the recessed splines goes towards the 3rd gear. This end also has thicker teeth on the outside than the other end.

Alex

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