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Sorta OT: Getrag 260 & 265 myths and facts


Schweineback

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This question was raised in the thread (HERE) about the s14 with Getrag 265 gearbox and propshaft. I don't wish to hijack the thread so here goes.

There is this story, or rumor that one can modify the later style gearbox, say post '81, to take the speedo cable for a mechanical speedo. The casting of the aluminium is the same, but in the later types the hole is filled with a plastic piece. I was talking about this modification with a mate the other day, and we both knew the story, but had never seen it actually done by someone.

Is there anyone here that:

- did it

- knows someone that did it

- knows if it is really possible

- can say if it's easy and worth the trouble and expense

- has pics of the adaptation process

- or has any other clue?

Like Jamie and Adam, I'd like to have this myth busted or confirmed.

Dreamed I was an Eskimo.

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Yes I've done it. It's been a very long time so It'd be easier for me to describe it in person with a trans in front of me...

Basically there is a plug in the hole where the speedo drive would go.... and there is a spacer sleeve in place of the speedo drive gear on the output shaft.

I'm sure someone here like CD can explain better than me.

HTH

Tom Jones

BMW mechanic for over 25 years, BMWCCA since 1984
66 BMW16oo stored, 67 1600-2 lifelong project, 2 more 67-8 1600s, 86 528e 5sp 585k, 91 318i
Mom&Dad's, 65 1800TiSA, 70 2800, 72 2002Tii 2760007 orig owners, 15 Z4 N20

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This question was raised in the thread (HERE) about the s14 with Getrag 265 gearbox and propshaft. I don't wish to hijack the thread so here goes.

There is this story, or rumor that one can modify the later style gearbox, say post '81, to take the speedo cable for a mechanical speedo. The casting of the aluminium is the same, but in the later types the hole is filled with a plastic piece. I was talking about this modification with a mate the other day, and we both knew the story, but had never seen it actually done by someone.

Is there anyone here that:

- did it

- knows someone that did it

- knows if it is really possible

- can say if it's easy and worth the trouble and expense

- has pics of the adaptation process

- or has any other clue?

Like Jamie and Adam, I'd like to have this myth busted or confirmed.

I've had it done.

First, this does not apply to the 260 trans, only 265s.

Like Tom says, there are 2 changes. First, there is a drive gear on the trans output shaft that is replaced by a spacer bushing on the M3 trans.

Second, there is a hole in the trans rear case part that has a sheet metal plug, kind of like a freeze plug in a block, that has to be pried out. This where the speedo cable drive goes.

When I had mine converted, I gave the guy who did it an old 6 cylinder 262 4 speed donor trans to supply the speedo cable drive and output shaft pinion gear. It appears that all the speedo cable drive are the same, 4 or 6 cylinder trans. The drive gears may be the same too, but I have not been able to confirm that.

I know of a couple of guys who have made pullers to get the pinion gear out of the donor trans.

The 265s were available with speedo drive stuff installed on US model 5-6-7 cars during 1980-81. Then, 265s without speedo drive stuff were installed on US models 82 528e (with a bellhousing to fit the M20 engines), 1985 only 535, 635, 735 and finally in the E30 M3s.

All of this is a lot more relevant to the early 6 cylinder cars, since these trans don't fit into 02s very well.

It is not real easy, but it is hard to find the 265s that do have the speedo drive stuff installed and they are not cheap.

BMWCCA #2762
72 2002/71 2002ti, 67 2000CS, 2x 72 3.0CS
86 635, 2x 05 330Ci ZHP, 
'11 Corvette Grand Sport

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Guest Anonymous

on it. It is clean and in good shape. The bellhousing is for the 3.5 liter six cylinder engine so if you are attaching it to an S14 you will have to provide the correct bellhousing. Located in Vacaville,CA.

shermanmartinez@hotmail.com

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on it. It is clean and in good shape. The bellhousing is for the 3.5 liter six cylinder engine so if you are attaching it to an S14 you will have to provide the correct bellhousing. Located in Vacaville,CA.

shermanmartinez@hotmail.com

The S14/M10/S38/M30 Bellhousing bolt patterns are all the same....

The M20/M42/M50/S50/M52/S52/S54 Bellhousing bolt patterns are the same...

HTH

Tom Jones

BMW mechanic for over 25 years, BMWCCA since 1984
66 BMW16oo stored, 67 1600-2 lifelong project, 2 more 67-8 1600s, 86 528e 5sp 585k, 91 318i
Mom&Dad's, 65 1800TiSA, 70 2800, 72 2002Tii 2760007 orig owners, 15 Z4 N20

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