[RallyBob]

Question: Are you guys refering to the Getrag 265 or to the 240? I ask because the 240 (more common) has the same output shaft as a 4-speed Opel. In fact, you need to cut down a 4-speed driveshaft to fit it.

The Opel automatic output shaft spline is the same as a ZF 5-speed (kinda rare), and the automatic driveshaft itself is too short for a Getrag 5-speed, but fits directly with no mods into the ZF.

Bob

 

[RallyBob]

It requires much more work to install a 265. It's physically larger, much heavier, and has a different output spline. Input shaft should be the same, although I've heard that some models are different (Omega?). I don't know if the shifter is the same as a BMW's, but either way it will be sitting WAYY back near the emergency brake, so it needs to be cut/welded.

Bob

 

[RallyBob]

Re: Getrag 240 or 265?

I was under the understanding that the 240 output splines matched the Opel Automatic, which in turn was "standard" corporate GM. And since the automatic driveshaft was too long, it was just as easy to get your 4-speed driveshaft shortened with a GM tranny spline. And the input splines were the same as the stock Opel 1.9 CIH clutch disc, and hence the same as the GM S-10 clutch disc.

I have had numerous Getrags in my Opels and one ZF. The Getrag 240 definitely used a shortened 4-speed shaft with a 4-speed spline. An automatic spline is larger. The new shortened driveshaft length falls in between the stock 4-speed's and a stock automatic's.

The 265 Getrag uses the automatic output spline though. Can't comment on the driveshaft length though, I haven't installed one (yet). My friend just got 3 Getrag 265's from England, so we'll see how much work it is to fit.

Bob

 

[RallyBob]

Okay, I admit I suck. I went and checked out a few trannys to verify the fact that I'm wrong. Otto, Keith, you're absolutely right.

Bob
'Hanging his head in shame...maybe it's time to change cars'

 

[RallyBob]

Also does someone know the link to the gear ratios in either transmission? I would like to compare them. Only thing I think I know is that the 5th gear in the 240 is .73??

Stock 4-speed:

3.43
2.16
1.37
1.00

Getrag 240 5-speed:

3.717
2.019
1.316
1.00
.804