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GreenSwede

WTB, part number, or at least a name..?

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About to have a tranny (4-spd) rebuilt by a mechanic, he was a BMW mechanic during the 70´s so I trust him.

He told me to start with the synchronous rings and the.. what? The outer.. carrier? Translated from swedish in a direct way it would be "synchronous crown"?

What´s it called in english? Part number? Where do I buy? (W&N does not have it.)

Thankfully

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I don';t know what the market is like in Sweden , but in NA it might be cheaper just to put in a whole used transmission.

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What year is the car? It makes a difference if it has the Porsche style or Borg Warner style synchronisers.

If it is the early Porsche style box (BMW Getrag 232) you need:

Guide Sleve (2)23 31 1 490 107

Synchroniser Ring (2) 23 23 1 630 122

If it is a later Borg Warner syle (BMW Getrag 242) you need:

Shift Sleve (2) 23 23 1 209 441

Synchroniser ring (2) 23 23 1 209 433

I doubt you would need the Shift Sleves for the 242 box but could need them for the 232 box. BMW has started making the Shift sleves and synchronisers available for the 232 and 235 boxes again they were NA for a long time.

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What year is the car? It makes a difference if it has the Porsche style or Borg Warner style synchronisers.

If it is the early Porsche style box (BMW Getrag 232) you need:

Guide Sleve (2)23 31 1 490 107

Synchroniser Ring (2) 23 23 1 630 122

If it is a later Borg Warner syle (BMW Getrag 242) you need:

Shift Sleve (2) 23 23 1 209 441

Synchroniser ring (2) 23 23 1 209 433

I doubt you would need the Shift Sleves for the 242 box but could need them for the 232 box. BMW has started making the Shift sleves and synchronisers available for the 232 and 235 boxes again they were NA for a long time.

The car is a 75, but tranny is replaced by PO.

How do I identify which one it is? Oh wait, I´ll search..=)

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I really doubt you have an early box. Ill bet all you need are the syncro rings and a gasket set. They need to check all the bearings just in case.

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