No. The gearset determines what engine it will go on, not the bit round the outside. The gearbox code indicates the gearset fitted.
A definite list? https://www.volkszone.com/threads/ratio-data-codes-for-you-all.1345537/ Would appear there were 3, 5 and 6-rib 091s. Presumably, they made other mods to the case apart from ribbage. <edit> Maybe not 5-rib.
For your geary convenience, a PDF of the above to Cut Out'n'Keep. Share it with your family and friends (if you want to bore them).
My guess is the 091 refers to the deeper bell housing. the 5-rib was discontinued when the 6 rib became a thing and the bell housings were changed so a 6-rib could take the flywheel for a bigger clutch. As I found to my cost they also changed the vehicle body to accommodate the longer gearbox so all gearboxes had to have the deeper bell housings.
As far as I can remember there is a plastic spacer on 091s that is metal on the earlier boxes. And that if you let the heat build up with a lack of oil, that part can melt on long motorway runs.
Possibly. Maybe the 002/091 number refers to the complete assembly of box and bellhousing. Only time I've encountered the long/short issue is when trying to get the correct starter motor (my van has a replacement CE box, but the original '78 CU bellhousing - much confusion).
Is the extra length of bellhousing clearance for the 228mm clutch assembly? E.g. A 215mm goes into the older bellhousing no problem..
Mine is the opposite way around I think. There should be a CE code (002) gearbox in a '74 bus, but what I've actually got is a CU code (091). From memory when I looked at replacing the dodgy starter motor, I have the original shorter bell housing (and got the starter motor refurbished) Edit: because I like to remind myself of these things, I've just found and reread my starter motor thread - I lied above, I have a later starter motor and so a later bigger bell housing with my later gearbox. As you were.
