Get it and then..or?

[5senses]

Don't tell nobody but i found a 3.73 to swap in my 3.46 but the shell looks rusted and oily.. Now the 3.73 is from a 525 while i have the M30.. ok or nada? Clean it up.. the shell that is then do what? Yup i'm a newbie @ differentials.. gimme a minute let me cramm..

3.73.........
http://www.bmwmobiletradition-online.com/bmw/showparts.do?model=HC13&mospid=47402&btnr=33_0004&hg=33&fg=05

3.46........
http://www.bmwmobiletradition-online.com/bmw/showparts.do?model=HD13&mospid=47408&btnr=33_0004&hg=33&fg=05

thanks alot...

[Stir Fry A Lot]

Yeah, its fine. Sorry I didn't get back to you. I was in class. Congrats, the 3.73 makes a world of difference. Just clean it with some Simple green or engine degreaser, drain and refill it with new fluid.

[moroza]

What he said. I'd also paint any exposed steel (aluminium rear cover's fine) to keep it from rusting more.

525i's had smaller axle flanges, so you'll need to use yours.

[Stir Fry A Lot]

Oh yeah, that's right. Just take a big screwdriver and pop of the side flanges and replace them with your old ones..

[5senses]

word word... thanks again guys

Stirfryalot.. Harmonic Balancer behind the flex disc...

Harmonic Balancer... Think this will balance out the driveshaft a bit more or what? I haven't seen these on parts cars or current cars.. only through maximillian. So this can be considered a rare item.....

http://i676.photobucket.com/albums/vv130/DirtyD124/IMG00683.jpg?t=1256912369

[5senses]

So today i was in the process of removing the diff from the donor car... no i didn't remove it cause of the axles.. should i remove the 13mm bolts from the diff side or the wheel side...

Differential side.. Note the rust..ill
http://i676.photobucket.com/albums/vv130/DirtyD124/IMG00702.jpg?t=1256971060

Wheel side..
http://i676.photobucket.com/albums/vv130/DirtyD124/IMG00704.jpg?t=1256971141

Now I spoke with my trusty Bmw mech and he stated to remove the sub frame a little so the axles can pop right out..

Any insightful help would be appreciated.. thanks guys/gals

[moroza]

Holy crap that looks nasty.

Diffs are best removed by lifting the whole rear end, undoing the bolts on the axle flanges, swinging the wheel-ends of the axles out, and popping them out of the diff with flanges still attached. Fewer things to unbolt and more wiggle room for the diff. You won't be using those axles or flanges anyway.

13mm bolts? No, they're 8 or 10mm round hex bolts. The 13mm ones on the diff hold the side bearings in - nothing worth messing with for removal, certainly.

PB Blaster will be your best friend for this job.

[5senses]

Holy crap that looks nasty.

Diffs are best removed by lifting the whole rear end, undoing the bolts on the axle flanges, swinging the wheel-ends of the axles out, and popping them out of the diff with flanges still attached. Fewer things to unbolt and more wiggle room for the diff. You won't be using those axles or flanges anyway.

13mm bolts? No, they're 8 or 10mm round hex bolts. The 13mm ones on the diff hold the side bearings in - nothing worth messing with for removal, certainly.

PB Blaster will be your best friend for this job.

Those hex bolts were a bitch!!!!!! i got them off.. I'll post pics of the axles and where i stand tomorrow.. thanks

Yup.. 2moro the pbblaster is going to use

Yup.. 2moro the pbblaster is going to use

Ownership is mine... pics of 3.73..

http://i676.photobucket.com/albums/vv130/DirtyD124/IMG00709.jpg?t=1257190012