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Auto to manual.

Posted: Thu Sep 06, 2007 11:29 pm
by swindy
Need some advice, I have a manual set up, I think I got everything from my old 320. I now have a automatic 325 touring and it will be getting a manual conversion.

What bits do I need, and how hard is it? Im thinking a slight change to the trans tunnel were the stick comes through and the obvious pedal box with added bracket for the clutch fluid reserviour, I have the pipe work, is the mounting for the selector bush there or not? Is the prop the same?

Any help greatly appreciated.

Mark

Posted: Fri Sep 07, 2007 7:31 am
by charlE30
gazza wrote:its not difficult but other than the box you will need propshaft as auto one is a different length diff should be ok but you will need a pedal box and master cylinder/reservoir and pipe for the slave cylinder as well as bits like gearknob and gator ...you will need to do a search for details on the inhibitor switch which will need to be disabled as well as a clutch and flywheel you need a spigot bearing for the crankshaft ...sounds a lot but its not really when i did mine i found it was so much easier having a doner car as by the time you have bought all the bits it adds up and if you are lucky enough to buy that £50 breaker it will keep the whole cost down
Borrowed from the gearbox change thread :D and I would imagine (knowing BMW) that the mount for the selector arm will already be there.

Hope this helps....

Re:

Posted: Fri Sep 07, 2007 11:37 am
by swindy
Whats the inhibitor switch?

Re:

Posted: Fri Sep 07, 2007 1:20 pm
by AdamAnt
stops the car from starting when not in park or neutral..i think.

Re:

Posted: Fri Sep 07, 2007 2:23 pm
by Brianmoooore
Only change where the gearstick comes through is to remove a little bracket from the centre console which otherwise would rip your gear lever gaiter.
325 manual gearbox, prop and diff are all completely different from those fitted to a 320 manual, but the 320 bits will fit a 325 engine, although the clutch and gearbox are weaker.
Use the 325 diff, and you can get away with the 320 box, clutch and prop.

Re:

Posted: Fri Sep 07, 2007 4:05 pm
by swindy
The 325 auto rear diff different? I thought they would be the same.

Sound advice comming in I will be laying my hands on a 325 box, prop and if need be a rear differential of a manual.