It's purely to increase the amount of spline on the driveshaft. In stock configuration, a large section of the shaft is not even used. A thicker guibo pushes the shaft into the TC farther engaging more spline for a stronger connection.
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Front driveshaft guibo mod (fatter flex disc edition)
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I have found multiple part numbers for an X5 centering flange. They seem to appear visually identical, including the part suggested in this thread:
E53 X5 M54 3.0i: 26117507533
E70 X5 N52N 3.0si: 26207567717
This Thread (not specified): 26201227191
Does it matter? All the same price too (lowest I could find is $67) Only difference is availability of shipment from vendorsCurrent State: '88 iX
Two Doors, Three Pedals
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Originally posted by tk32 View PostI have found multiple part numbers for an X5 centering flange. They seem to appear visually identical, including the part suggested in this thread: E53 X5 M54 3.0i: 26117507533 E70 X5 N52N 3.0si: 26207567717 This Thread (not specified): 26201227191 Does it matter? All the same price too (lowest I could find is $67) Only difference is availability of shipment from vendors
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Originally posted by D.Martijn View PostI figured I might as well post pictures of my iX with this mod. (been almost 2 years now) I removed a bit more material at the flange, so I can push the hole axle even further back when fitting the centering flange and guibo. I didn't need to shorten the X5 centering pin.
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Originally posted by jeenyus View PostThese are great pictures! Did you end up not using the torx bolt that goes where you trimmed on the lower housing? Or did just leave it out completely? Did you remove the lower housing to trim or do it on the car? The centering flange I used was PN 26117507533. I think the older ones were slightly different and didn't require trimming, but this PN specifically wouldn't have fit without the trimming.
I did remove the brace so I could use an end mill on the manual mill at work to remove the material. I actually went a little bit too deep and the aluminium teared in one spot. I used some epoxy to cover the small crack on the inside (transmission side) so there is less chance that unwanted dirt/water can get to the flywheel/clutch.
I didn't know about the new part no's. I should have a look which one I got. I do remember getting a used centering flange from Ebay.
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Originally posted by The Dark Side of Will View PostYou put the plastic cover back on the splines, right?
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It should be about 1/4". That's 33% more spline area. The stock engagement is only 3/4", it's clearly not enough - especially when the lubrication dries out..
is that molykote stuff still available? I still have my original tube. As long as it doesn't go bad, it should be enough for my entire lifetime, lol.
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Originally posted by nando View PostIt should be about 1/4". That's 33% more spline area. The stock engagement is only 3/4", it's clearly not enough - especially when the lubrication dries out.. is that molykote stuff still available? I still have my original tube. As long as it doesn't go bad, it should be enough for my entire lifetime, lol.
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Originally posted by E30andy View PostQuestion about grinding down the flange.....I dont have air tools but I have a dremel. Can the job be done with a dremel and grinding wheel? Thanks!!
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Originally posted by E30andy View PostLooking to purchase the parts for this upgrade.
There are several brands of flex disc available including OEM BMW ($140), Meyle ($47), and Corteco ($41).
Are the non-OEM brands safe to go with?
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