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Creaver

540iA -> 540iM + rear subframe bushes

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e28 535 or M5?

no e28 m5 use 3.73 and 3.91

e28 535i use 3.07 and they are slightly different shape to the e34/e32 diffs

Yeah, I was thinking e28 m5? But it's open so must be a 535 of sorts?

Either way, going to test fit it today. :) When compared with another large case diff out of an e34 it looks identical

will be from a e34 535i or e32 735i

the large case e34/e32 6cyl diffs use a different input flange to the large V8 diffs

axles are the same

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A question for you all:

Should I put it all back in once i'm finished or leave it out?

post-2030-1292401077.jpg

post-2030-1292401089.jpg

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Put it all back in.. or it wont be a full leather lounge suite..

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^+1 , but it is rather heavy B)

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You sure there isn't an ulterior motive for your answer? :P

Never.. you should fix your steering issues first before you try to go faster :P

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Put it back in! .... when was the last time you had all of the interior in the car? .... yes that does include the glovebox and shift surround!

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Put it back in! .... when was the last time you had all of the interior in the car? .... yes that does include the glovebox and shift surround!

Haha, I hope those parts aren't still out of the car!

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Haha, I hope those parts aren't still out of the car!

Some of them are :S haha

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Installed the 3.45 last night...what an improvement.

The 2.93 revved approx 1950 at 100kph, now it's approx 2450 at 100kph with the 3.45......who cares about fuel economy! :)

Plan is to head to 2nd Jan trackday at hampton

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sounds good .

wanna come down and compare :)

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Come to hampton Jan 2nd :)

Unfortunately i'm going away for xmas etc

yes should be there with the e28 .

no i was meaning compare with the e34 i have .

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In regardes to fitting the trailing arm bushes doesnt that effect the action of the pitman arms stopping the side to side movement under wheel travel?

I was to believe that movement is there to correct geometry at speed threw a corner?

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Hmmmm.

I'm not sure of the complications relating to that sort of stuff :S

Anyone have any thoughts on this matter? Good point of discussion

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i have the complete rear out of your car i went to put into my turbo e34 m50 but want to keep the medium case diff due to ratios but couldnt due to the flange being bigger but i believe theres a big flange med case i can swap with, based on the power it wont last long but with the 2.9 or 3.15 and rev limit of 8k i dont think theres to many places to do 200plus mph!!!

I was just thinking with stopping the arm travel as such would upset the backend under load which is why i didnt fit them, didnt want to find out the hard way.

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The little 'dog-bones' on the rear sub-frame are to dynamically change the toe with wheel travel (ie. keep the same amount of toe) as the semi-trailing arms are renowned for toe-ing in under compression, not to do with 'speed' in particular.

This was drastically improved from the trailing arm angle of 15degrees on the E30 - early E28/23 (& Z3/Compact/M Coupe-Roadster) rear end, to 12degrees + the 'dog-bones' to control toe in the later E28's & E34/32's.

So going to solid or firmer bushes and eliminating the 'dog-bones' isn't going to be a drastic change, and probably balances out from a handling pro-con POV, with the firmer bushes being far more consistent/positive.

And FYI, a few years back when I was sourcing bushes for my e30/28 I spoke with Andrew from (formerly) Noltech (Oz) and he advised their urethane bushes where compatible with the 'dog-bones' so I went that way.

Thing with the 'dog-bones' is the seals tear easily and then wear out quickly, next time around I will be using much firmer bushes without the 'dog-bones'.

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