Getrag 260 interchange and information... good info!!!

[JasonBates]

I just picked up transmission for my 'early eta' and it turned out to be an 'i' trans.
So, my question is, do I need the second cps on the bellhousing, or should I just wait to do a head/ecu/engine harness? swap to put in the transmission?
Also, what shifter linkage and flywheel should I use?

[CoClimber]

I just installed a late ETA transmission into my S50 swap. It had the deep bellhousing. Rather than getting the thicker throwout bearing, I machined a .2" thick aluminum plate that fit over the back of the throwout bearing, effectively moving the throwout bearing forward to compensate for the deeper bellhousing. Really wished I took a photo of it but it is buried in the car right now. The car is still a few days away from running so I haven't tested it fully but the clutch seems to release at the correct point when my son spun the rear wheel and I let out the clutch.

I'm lucky in that I have access to a machine shop where I work, otherwise, I would have gone with the fatter bearing.

[iamsam]

thanks man, good info!

[jw 325ic]

Check my thread, it's "based" on this one with more info that's more accurate: http://www.r3vlimited.com/board/showthread.php?t=215361

[iamsam]

Very good info here.

Also, I assume that M20 powered E28s are exactly the same as the respective E30 as far as the transmission? Other than the G265 of course...

[TobyB]

Actually the bell housing depth of i cars and early etas are the same as they both have single mass flywheels.

errr..... might be good to confirm this,
as I have a dual- mass eta transmission with the same- depth bell as the i/is single mass...

t

[JGood]

Actually the bell housing depth of i cars and early etas are the same as they both have single mass flywheels. The later etas have twin mass. You can use an early eta trans on an i with plugs and the shifter adapter but not the other way around. See my trans thread on pg 2. I used some of your info but made corrections.

I'm not sure how I missed that. I even have an early eta trans with m20b25 clutch/flywheel parts on my m50 car. It does have the mounting ears for the late style shifter though, as that's what I'm using.

[pantelones]

Correct.

Drilling those huge holes as the exact correct location, and then the accompanying bolt hole, then tapping that hole for the bolt, would all be WAY more hassle then just picking up an eta trans, which you should be able to find cheap.

Not to mention you'd then need to use later style shifter setup, and also you'd then have the deeper bellhousing depth for clutch components. I'd rather convert then engine to an m20b25 to work with that trans, then convert the trans to work with an m20b27!

thank you

[jw 325ic]

Correct.

Drilling those huge holes as the exact correct location, and then the accompanying bolt hole, then tapping that hole for the bolt, would all be WAY more hassle then just picking up an eta trans, which you should be able to find cheap.

Not to mention you'd then need to use later style shifter setup, and also you'd then have the deeper bellhousing depth for clutch components. I'd rather convert then engine to an m20b25 to work with that trans, then convert the trans to work with an m20b27!

Actually the bell housing depth of i cars and early etas are the same as they both have single mass flywheels. The later etas have twin mass. You can use an early eta trans on an i with plugs and the shifter adapter but not the other way around. See my trans thread on pg 2. I used some of your info but made corrections.

[JGood]

so just to clarify, you can't use a late model i trans on an eta due to the lack of a cast boss for the crank positioning sensor. right? or wrong? i did some searching and i haven’t come up with a definitive answer. i am assuming that you cant just drill holes in the i trans for the sensors, and that you need the cast boss? right?

Correct.

Drilling those huge holes as the exact correct location, and then the accompanying bolt hole, then tapping that hole for the bolt, would all be WAY more hassle then just picking up an eta trans, which you should be able to find cheap.

Not to mention you'd then need to use later style shifter setup, and also you'd then have the deeper bellhousing depth for clutch components. I'd rather convert then engine to an m20b25 to work with that trans, then convert the trans to work with an m20b27!

[pantelones]

so just to clarify, you can't use a late model i trans on an eta due to the lack of a cast boss for the crank positioning sensor. right? or wrong? i did some searching and i haven’t come up with a definitive answer. i am assuming that you cant just drill holes in the i trans for the sensors, and that you need the cast boss? right?

[jw 325ic]

looking at realoem and pelicanparts.com, it seems like the early eta's use single mass flywheels (like the 325i) but has the aluminum plate style shifter. the later eta's from 5/86 on have the dual mass flywheel but does have the later shift style shift arm.

also for anyone with an "i" car, you can use your 'bent' style shift arm and linkage with the late eta transmission. it lines up perfect.

[daleb]

#Luke, I'm on here once in a great while, was just reading Lance's rebuild thread on his Pro3 car

#JGood, thanks for updating the link and helping to get the information out there

#Mike, Since Mike Helton's son-in-law, Andy of AKG built the car back in the 90s, I'm assuming they are a very old version of AKGs trans mount.

[JGood]

I wrote the data on transmissions above, we've changed the software on the pro3-racing.com website, so the link above doesn't work any longer.

I've posted the data and expanded it on this post at my site, Unofficialbmw.com:

http://www.unofficialbmw.com/phpBB/v...ic.php?t=33173

Thanks for the write-up, it is greatly appreciated! I'll update my post with the functioning link.

[StereoInstaller1]

Dale! You are on R3V!