Quote:
Originally Posted by E34Play
Nice to see someone else exploring this. I made the decision as well for my 4.6is, but I have many other projects ahead of this one. I have an e39 6spd trans and pedals, and the hydraulics/shift linkage from the 3.0 as well as a UUC e53 shifter. I've swapped four 540i's so far, and one 525iaT to an M5 touring, so the conversion should be simple. The most difficult part will be measuring the driveshaft and sending it out to be lengthened.
One thing it will certainly need (IMO) is an LSD in the rear. The e30, e36 (M), e28, e34, e23, e24 and possibly others have available 188mm LSD's in a variety of gearing. I feel the 3.64 in the 4.4, and especially the 3.91 in the 4.6 would be too short for the 6spd manual... Considering the 540i/6 came with a 2.93 and the M5 with a 3.15. The e34 535i/5 came with a 3.46 LSD, and the 92-95 525i/5's came with a 3.23 LSD, which would be just a *hair* shorter than the e39 m5's 3.15 ratio. Both should allow the X to get up and move just fine, and would make them quite a bit more economical on the highway.
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Good day!!
You bring up an excellent point... I have the 4.4L in "4" and the 4.6L in "2"... I am not going to type this out loud, so everyone cover their ears, but I think the trans in "4" is getting better... Maybe air purging out of all the little places in the valve body... and it's re-learning all over again... It didn't really act up on the way home... It shifts REALLY REALLY quickly thru first, second, and third... It just wants to be in fourth for some reason... I haven't taken it to "SPORT" mode yet... Shhhhhh.... We don't want to frighten it...
SOOOOOO.... If I do "2" first... I think I will have to swap in the 4.4L rear diff for now... Only because I have to do some extensive research as to what I can do with the housing and avail parts from other BMW's... No other BMW rear diff will just bolt in like in the days of old... and nearly every bigger motor base model had an LSD option avail prior to 96... We lose the LSD, but gain ASC or DSC... Ummmmmmmm....... But, I would love to have the 3.23 or something around that... I had swapped in the 3.15 in my second 540i, and it was a huge improvement to many things!!
I'm off to sleep...
Cheers all!!!