Now since the Nissan A series engines have ended up in all sorts of cars
Its a shame that 5 speeds as rare as they are have ended up in non-nissan
body vehicles especially the Morris Minor.
I thought if thats the case we need to search for a removable bellhousing
transmission for the A series that is more common than the T50, weighs about
the same yet lighter than a W series toyota box and is cheap.
The BMW 3 piece boxes are the solution and finally have found info on the
Getrags used in these try hard cars for people who cant afford a Benz :)

MODEL 265 getrag
1980 - 1981 -- 528i, 633csi, 733i,
1980 - 1982 -- 635csi Euro

1) 5 Speed
2) 3 piece aluminum case with removable bell housing
3) Looks much like the earlier 4 speed 262 box with an
intermediate housing (97 mm wide) added.


1985 only -- 535i, 635csi, 735i

1) 5 Speed
2) 3 piece aluminum case with removable bell housing
3) Looks much like the earlier 4 speed 262 box with an intermediate housing (97 mm wide) added.

1) Very strong gearbox for HiTorque applications
2) Takes about a 15 ton pull to remove 5th gear..
3) For one year, '85, BMW switched from the 260 gearbox in favor of the older 265 box.
4) Moly synchronizers.

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may be able to source a box for mesurments
frend runs a bmw racecar work shop around corner
his son works at a bmw wreackers aswell
tommo

Info from other sites

The G 265 gearboxes always outlive their host cars.
Look for them in 6 cyl BMWs: M3 and big six '80 to '82, 528e '82, 535, 635, 745 in '85.
They have removable bell housings which is why they are easy to adapt.
They might have casting numbers starting 262, but you can tell it is a 265 if it has a 97mm long center casing which is sand cast so it looks a bit duller than the front and back castings. They can take 350 ft/lbs of torque in standard form.

You can get new aluminium bell housings made to fit these gearboxes onto a SBF or SBC for $200 in South Africa. So they must be strong!!!

The ratios of the 265 are well suited to the tiger at: 3.82, 2.20, 1.39, 1.00, 0.81

Less common Opel and some Volvos have a splined output shaft.
The BMW boxes have a flanged output so require a propshaft with a sliding section.

(there are two different mounting positions, probably to match different cars.)

Other useful info is that the 265's have either a Ford or a Chevy input clutch spline (Centerforce clutch disk and pressure plate available off the shelf)


265 is a five-speed with overdrive 5th. The 265 is in four sections: tail casting, intermediate casting, main case and bellhousing. To make things tricky, the 265 frequently (if not always) have a 262 number on the main case as that portion is identical to the four-speed 262.

262CR is a "close ratio" five-speed with 1:1 fifth. The 262CR also has four sections as the 265. To distinguish a 262CR from a 265 you look at the intermediate casting. The intermediate casting on the 262CR apparently has a rougher finish than the other castings on the transmission. Also, the bolt holes on the intermediate case are aligned on both ends of the intermediate case so that it appears that you could remove that section and bolt up the tail casting to the main case (that is not the case with the 265).

The M50 & M51 are Volvo getreg boxes

M50 is a 4 speed box

M51 is a closed ratio 5 speed box with a 1 to 1 5 gear


VOLVO
The Volvo have a coarse spline on the input sharft and has a normal 4 bolt rear flange and a speedo drive. These boxes come in the 75 to 78 260 series volvos from the factory

The BMW Getrag boxes have a fine spline input sharft and have a giblo drive rear flange

I understand the volvo and BMW boxes have very similar cases but the ratios and the input and the rear flanges and shifters and shifter carrier are different

Volvo m51 (265 with volvo ratios)
1st - 3. 99:1
2nd - 2.58:1
3rd - 1.77:1
4th - 1.27:1
5th - 1.00:1

GpA 240T Homologation ratio's : 1st - 2.328:1, 2nd - 1.675:1, 3rd - 1.353:1, 4th - 1.145:1, 5th - 1.000:1

TOMMO would be good to get some more info, the only issue is the weight
could be like the celica/hilux/supra w series. Either way its a venue
for a good gearbox as even the toyota boxes in the W series are gone
before they come into most wreckers.

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These are amazing gearboxes and are used in many race aplecations here in SA They are fitted to basicly anything and in all my time I have heard of 1 guy who managed to break one. He managed that by doing burnouts and I know the ones over here has a sincronized reverse gear. So he was going about 20kph forward and the selecting reverse and droping the clutch with the rpm hanging in the rev limiter. He did that for some time so yes they are STRONG

Superbin
Do you know if an A series bellhousing is available in SA for them
Ive seen Bellhousings avail for other conversions.
I suppose maybe not considering you guys have plenty of A series
5 speeds.

is this the same box some commodores had?
ive got a w50 for my ca but i'm having to make an adaptor plate as there is not a ca removable bellhousing

The main problem will be the spigot size. The Toyota box's are chosen for their ease of spigot adaptors.

I am in the middle of adapting 262CR gearbox to the A-series motor.

I will let you know how it goes.

I can tell you now that the Getrag gearboxes are a lot taller than any A-series gearbox, you will need to highly modify your gearbox tunnel to make it fit, also the Bmw's run a two pce tailshaft.

Dont think so we just buy more and more a series boxes lol. If u want one they cut it off a a series and make it to spec