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BMW 3-Series (E90 E92) Forum
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Decided to fit a M3 diff
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12-03-2012, 02:53 AM | #177 |
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That's interesting. I had read that any difference in track width between M3 and normal e92's was due to wheel offsets.
So this meant most suspension arms are easily interchangeable apart from the 1 or 2 (marginally longer or different damper connection) The rear hubs aren't that different either. I kinda assumed any difference in driveshaft lengths would be down to the width of the diff. Hopefully someone knowledgeable will be along shortly! |
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12-03-2012, 05:45 AM | #178 | |
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And it would be not logical if the length would be 86mm So I guess everything is ok. |
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12-04-2012, 04:26 PM | #179 | |
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08 E90 335i AT RB Turbos -NX Wet Kit - Chiplogic Flash or Procede V5- M3 Diff - AE Exhaust- Forge Dv's - Helix Intercooler - AR DP's - P3 Boost Gauge - Vishnu Meth- Stett Chargepipe and CAI
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12-05-2012, 01:46 AM | #180 | |
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12-05-2012, 05:12 AM | #181 | |
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The 86mm vs 102mm is the bolt spacing on the diff flanges which is the reason why the m3 side shafts are required. Even if there is a small amount of preload on the sideshafts, causing the joint to be pushed in slightly I can see this causing problems especially with aggressive launching. For an unrelated reason I'm actually going to use the m3 hubs so that the whole of my rear subframe except the lower arms (have Bilstein 335i dampers) will be m3 parts including the BBK. |
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12-05-2012, 05:22 AM | #182 |
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Oh please no! Just got my dct M3 driveshaft delivered - think I'd shed a tear if there's 'complications' Northern Ireland is not a great place for reasonably priced automotive engineering!
The interchangeability of the suspension arms between M3 and us leads me to suspect it'll all be okay for 335i drivers however. |
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12-05-2012, 06:15 AM | #183 | |
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12-05-2012, 06:16 AM | #184 | |
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Sorry just realized that you have 335i... So for you is nothing to afraid of already few 335i cars going on that setup w/o M3 subframe so you are good to go. Just people please who is doing conversions do as much as possible pics. Last edited by RimasRS; 12-05-2012 at 06:25 AM.. |
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12-05-2012, 08:11 AM | #185 | |
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12-05-2012, 08:38 AM | #186 | |
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12-05-2012, 08:41 AM | #187 | |
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I did manage to get do it 4mm too long first time around which meant the guibo was under too much pressure but the shop rectified it the same day. |
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12-05-2012, 09:29 AM | #188 | |
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12-05-2012, 09:42 AM | #189 |
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It was for me on the 335i but you will probably have an issue there on your 135i. It might be better to use your 135i shaft and weld the m3 diff flange on. I think Nigelo has the correct flange spare so it might be worth contacting him.
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12-05-2012, 11:37 AM | #190 |
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Hey Idnan! How's it going!
Yep Idnan's right - I've a propshaft from another BMW but the diff flange fits the differential perfectly. Won't be using it though as I've now got a dct M3 shaft. Think it was from a e38 or e39 v8 (not M5), so you might be able to pick one up on the cheap locally rather than me sending it to you! |
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12-05-2012, 01:30 PM | #191 | |
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BTW if you will be able please add some pics. Also did you had oem bolts for half shafts and drive shaft to diff? |
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12-05-2012, 01:36 PM | #192 | |
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I mean there goes bolts those which I call boomerangs and some gasket or just bolts and boomerangs? |
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12-05-2012, 05:17 PM | #194 |
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Hi RimasRS!
Yes, I have both the boomerang shaped reinforcements and the metal gasket. I was lucky enough that the propshaft came with the 6 bolts included. I'll soon have time to sort the driveshaft, but it'll be January before I have the cash to pay for the mechanical work. Lots of presents to buy first! |
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12-06-2012, 01:22 AM | #195 | |
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Just one more thing according to real oem there should be 3 boomerangs and can you check is there under them metal gasket because I dont see/understand looking to realoem should there be one or not? Can you closely check that on real drive shaft? |
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12-07-2012, 03:37 PM | #196 | |
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Hey, had a look there and there are 3 boomerangs as you call them. It goes on mine:
bolt > boomerang > metal gasket > edge of cv joint Quote:
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12-08-2012, 04:43 AM | #197 | |
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Can you also check one more mysterious washer number 22 here http://www.realoem.com/bmw/showparts...02&hg=26&fg=10 It says install it if yellow or blue dot is presented on mines I found blue dot marked at one of the bolts I guess it has to do something with balance of diff. Maybe somebody knows where I can find manual about installation of the diff to see what is correct torque of the bolts etc.. Like Bentley manual or something. |
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12-08-2012, 05:19 AM | #198 |
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i have the blue dot too, then you have to put these mysterious and exensive washers!?
at the end I put no washers and all 6 bolts the same, black ones that have less threaded part, they seem stronger. normally there should be one f another type, with more tread on it and green or silver colour, but never understood where exactly? near the blue dot? I don't have any vibration from the diff, but maybe with the right bolt in the right place it would be better????? BTW I have a complete M3 subframe with arms, carriers and M3 brakes. so for me the M3 dct shaft was the best, had only to shorten to the right length and mate with a 335i gearbox flange (look at realoem for the bolt pattern mm there are 320d auto that have the same flange you could slavage from) |
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