weird drive shaft issue

[davem]

Yes I know this should be the drive line sub forum but the sub forums see very little traffic (don't ban me lol).

So the drive shaft (and tranny) that has been in my car for a couple months is from a 1988/1989 325i parts car (five speed swap). When it was put in we put a brand new guibo that I ordered for a 1991 325i (so it's definitely not an eta 12mm guibo bolt driveshaft, my car is a '91 325i).

I ordered a re-manufactured drive shaft for a 1989 325i.



See the difference? My current set up has a "vibration dampener" attached to my drive shaft with three studs that bolt to the guibo. I also have three m10 bolts that bolt the guibo to the tranny output flange.

New drive shaft doesn't have any studs, so I'm guessing is supposed to use the 6 guibo bolt setup.

Real OEM isn't shedding ANY light on this at all.

I'm going to have to put my old shaft back in since there's no way I'm going to get the hardware I need (m10x50 or m10x52 grade 10.9)... but has anybody seen anything like this before?

[jlevie]

I've seen that and I have seen studs pressed into the transmission output flange. You could get the bolts from a dealer or a full featured auto parts house. The last time I ran into this I found that NAPA had the bolts & nuts I needed.

[mr.vang]

junk yard should have them. pain in the ass to remove if the shaft spinning freely..

[davem]

I've seen that and I have seen studs pressed into the transmission output flange. You could get the bolts from a dealer or a full featured auto parts house. The last time I ran into this I found that NAPA had the bolts & nuts I needed.

Yeah I can get the hardware on Monday (no one here stocks the 10.9 grade stuff so no go until then), can't have a lawn ornament until then though. I'll have to put the old one back in for now... really gay considering all the work to take it out.

[davem]

update: just tapped the studs out and put them in my new drive shaft, for some reason thought they were part of the vibration dampener