Author Topic: Close Ratio trans, AKA E36/Z3 trans swap. Tell me more... (Read 7114 times)

Euro Nation · « **on:** September 27, 2006, 08:58:03 PM »

Those who have done it, and I know theres a few out there (mostly euro guys). What does it take other than a Getrag 250? If I'm buying a trans I might as well upgrade.

doigal · « **Reply #1 on:** September 27, 2006, 10:03:02 PM »

The ratios are quite different - eg 5th gear is 1.00 on the G250 and 0.81 on the G240, so i hear that its best to change the diff to the 3.9 big case LSD at the same time.

Euro Nation · « **Reply #2 on:** September 27, 2006, 10:06:07 PM »

What about the actual mounting of the trans and driveshaft length?

doigal · « **Reply #3 on:** September 28, 2006, 01:25:41 AM »

I think (may or may not have any basis in reality) that the bellhouse will line up ok, but i think that the rear tranny mount needs a bit of simple work to fit. Also if you use half the e30 driveshaft and half the e36 then you get around the length issue.

Having never actually done this though i cant say for sure.

romkasponka · « **Reply #4 on:** September 28, 2006, 03:28:32 AM »

I fitted gearbox from E36 318is with my stock driveshaft. You have to check inside bearing diameter in rear of the crankshaft.

Clutch slave cilinder rod was lenghtened about 4 cm. It's better to make it adjustable, because it's difficult to make it right.

To fit lambda sensor you have to cut small bracket. I done this after gearbox was already fitted.

nickmpower · « **Reply #5 on:** October 29, 2006, 02:16:14 PM »

any details on the clutch slave rod? err, further details? I have my tranny and engine out and would really like to do this

nickmpower · « **Reply #6 on:** October 29, 2006, 02:18:13 PM »

also does the tranny have to be from a e36 318?

romkasponka · « **Reply #7 on:** October 30, 2006, 05:55:57 AM »

My tarnny was from E36 318is.

Jus make a tread on rod and long nut, because other way you have to cut and weld your stock clutch slave rod 3 times or more

nickmpower · « **Reply #8 on:** November 01, 2006, 03:24:11 PM »

what about just using the slave cyl from a e36 318?

I have a tranny on the way, and i suppose i should probably think about getting a different diff ratio. How is the 3.91? what the rpm at a certain speed in 5th?

romkasponka · « **Reply #9 on:** November 01, 2006, 04:42:16 PM »

195/50R15

100km/h (not true because tires are smaller) ~3100rpm

nickmpower · « **Reply #10 on:** November 01, 2006, 08:49:11 PM »

3100 at 60 are you sure? the e30 gearbox has a .81 5th and the e36 is 1:1 so i dont think that makes sense

doigal · « **Reply #11 on:** November 01, 2006, 10:43:44 PM »

You've lowered your diff ratio though havnt you?

romkasponka · « **Reply #12 on:** November 02, 2006, 03:26:41 AM »

doigal · « **Reply #13 on:** November 03, 2006, 01:27:49 AM »

Thats what i thought. Is it a hassle on freeway/highway driving?

romkasponka · « **Reply #14 on:** November 03, 2006, 06:41:49 AM »

Quote from: doigal;13246

Thats what i thought. Is it a hassle on freeway/highway driving?

No it isn't. 95% I driving in town so it is even better