[illjah]

Fit a 6 speed box as i did ,guaranteed to make a big difference,you'll have to change the prop too,leave the diff in and enjoy.

I can vouch for that as I've got his 6spd box & diff!! And I am enjoying it!

 

[illjah]

Glad to know that you're enjoying the box,how are you coping with the short shift?

Yeah its a massive improvement on what was in there, very little play, it is very notchy as you said, but feels firm and solid, and gear change is nice now. I used to have to change so tentatively from 2nd to 3rd in my old 5sp box.

And keeping the 3.91 diff is quite good fun, although I'm still considering possibly trying a 3.64 diff if I can get one in the long term - but I've got a lot of things I'm going to do first - like get that lovely new interior in!!! Its going in next week to get brake pipes re-done, few bushes and bits and pieces which will no doubt mount up to a pretty penny but hoping to be able to get the interior straight after that. I'll be in touch :cheers:

 

[illjah]

Hi, I am running 245/40x18 tyres but did notice during changing that stood next to the 255/40x17's there was a height difference, definately noticable with the first trip up the road that the car wasnt quite as lively. Am i right in thinking that the 6 speed has the same ratio in top as the 5 speed therefore making the lower gears closer together? which should help my cause? What should i be paying for a decent 6 speed 'box,prop,linkage and whatever else?

If you use 6sp box with 3.23 diff (as supplied on M5's with the 6sp box) then gears 1-5 are essentially the same, but you have an extra 'over-drive' gear at the top for lower RPM cruising (or a theoretical top speed of 200mph!!). But if you use the 3.91 diff as what is in 5sp cars, then yes 6th gear is the same as 5th, and the lower gears are shorter, quicker and closer together.

This is exactly what I have just done, although I am considering getting a 3.61 diff from an 8 series to get a comprimise so i can have some lower rpm cruising . Rob Levinson's website has some info here:

http://www.robertlevinson.com/M5_Touring/upgrades/transmission.htm

I bought just the 6sp box and prop shaft, but was lucky to find a good donor car, and the box appears to be in good nick, the prop shaft was very new, and the box came with a SSK which was a bonus!

Have to say though, I'm very surprised (and dissappointed) to hear that just upgrading to the M-Parallels has caused such a noticeable deterimental effect - I love the M-Parallels, and was considering a possible upgrade in the very long term, as going from my 535i with 18" Alpinas, the 17" throwing stars just look too small for the car to my eyes cosmetically.

 

[illjah]

I have a brand new 6 speed box which is up for sale.

I wish I was richer :crying:

but as I said the money I've saved on getting the s/h one, I can get the interior, have it fitted, and pay for all my bodywork niggles, and there doesn't seem anything wrong with the s/h one.

But I can't imagine how sweet it would be to have a spanking new box in there!!!