Many of the E30 boxes that come off your donor car will have quite worn gear systems. Anything with over 100,000 on it I can highly recommend looking for play in the parts and then replacing the following:
07 – RUBBER BOOT – 25111220912
Bush for the shifting arm
02 – BEARING SLEEVE, ROUND L=26MM – 25117519669
T piece parts
13 – GEARSHIFT ROD JOINT – 25117501309
17 – DOWEL PIN 23411466134
18 TENSION BUSH -25111203682
06 BEARING, SHIFT LEVER – 25111220600
Clip to hold on to gear stick
12 CIRCLIP – 25111220379
I didn’t bother with the yellow plastic washers as many of the replacement stick – including the Z4 one I got don’t need them as the bit at the bottom is wider by the size of the bushes.
Short shift the easy and less costly way – OEM BMW parts from other models!
You can use various different gear sticks from stock BMW models to create a short shift in your BMW Sportster. E30’s tended to have “Row Boat” gear changes from the factory. Our Sportster has a stick from the Z4 3.0 which is very short. A less aggressive one to use is from the Z3 1.9.
Here is a photo (from www.e30zone.co.uk) showing a comparison between various options:
Click me to enlarge
Part numbers for the gear sticks:
Z3 1.9 – 25117527252
Z3 2.8/3.0 – 25111222884
Z3M – 25117527254
Z4 3.0 – 25117543193
Z4 2.5 – 25117543192
PLEASE DOUBLE CHECK PART NUMBERS BEFORE ORDERING!
Here’s a picture it illustrate the the movement of the Z4 3.0ltr stick – if this is too short for you get the Z4 2.5 it’s a good compromise between the E30 row boat action and the very short Z4 one while still being nice a stubby at the top.
Here is the Z4 2.5ltr on Jason’s Sportster (the perspective it different from above, but it does move a bit further than the 3.0ltr one):