Rear end carrier bolt broke please help!

[169mph]

Originally Posted by Soundkillr

Rear end rear carrier bolt broke...please help

Guys took my backdraft out for a run today and got on it in 3rd. I hear a load bang in the rear end...and now something is striking somewhere making loud banging noise and sounds like axles scrubbing something.I noticed the lower carrier bolt as picture is sheared off and the end of the carrier where the bolt goes looks to be broken. Can anyone guid me on what to do? Can anyone send me pics of what its supposed to look like? It also appears the drive shat has moved out fron the transmission 1/8 of an inch.

Woukd thus broken bolt be my issue or should I look other places as well.

I had the same thing happened last month. Same Bolt sheared. I’m trying unsuccessfully to extract the end of the bolt out without dropping the differential. Tried to use a dremel tool to cut a groove in the end of the bolt so I could back it out with a flat head. Couldn’t cut a groove deep enough. I think lm going to drop the differential and replace the bushings and upgrade the front bolt.
Thanks Mike

[twobjshelbys]

What spec bolt???

[Sledge]

I installed the Active Autowerke diff support in 2010 and have not had a problem with broken rear end parts...at least not yet!

[Soundkillr]

Originally Posted by Sledge

I installed the Active Autowerke diff support in 2010 and have not had a problem with broken rear end parts...at least not yet!

Was the install easy? Does the lower cradle plate have threads in it for the two bolts to sandwich it down? Im trying to fgiure out how the two lower bolts attach.....and I would assume the upper cradle plate is threaded...

I see no bolt holes in the front carrier to accommodate the two bolts in the kit.

[Soundkillr]

Originally Posted by 169mph

I had the same thing happened last month. Same Bolt sheared. I’m trying unsuccessfully to extract the end of the bolt out without dropping the differential. Tried to use a dremel tool to cut a groove in the end of the bolt so I could back it out with a flat head. Couldn’t cut a groove deep enough. I think lm going to drop the differential and replace the bushings and upgrade the front bolt.
Thanks Mike

Sorry to hear...this is my thought...if you want to try it....im goingnto take a thin copper sleave to protect the threads...then im going to weld a small nut on the back of the broken bolt.....then im going to try and run the bolt forward toward the car. Hopefully this will work...but it will be about 3 weeks before my buddy can help me.

They only drill I could see fitting in that area would be a pneumatic 90 degree drill with a thin chuck. And even then I wouldnt be able to drill straight in for an extractor. If anyone else is dealing or has dealt with a broken bolt...what method worked?

Id rather eat bugs than drop thus differential.

[SBSerpent]

Originally Posted by Soundkillr

Sorry to hear...this is my thought...if you want to try it....im goingnto take a thin copper sleave to protect the threads...then im going to weld a small nut on the back of the broken bolt.....then im going to try and run the bolt forward toward the car. Hopefully this will work...but it will be about 3 weeks before my buddy can help me.

They only drill I could see fitting in that area would be a pneumatic 90 degree drill with a thin chuck. And even then I wouldnt be able to drill straight in for an extractor. If anyone else is dealing or has dealt with a broken bolt...what method worked?

Id rather eat bugs than drop thus differential.

I used this very same method to extract a broken exhaust manifold bolt on a 460 BB where the shaft of the bolt was barely proud of the surface of the manifold. Work perfectly. You should have no problem with this method. Bolt will come out easily.

[Soundkillr]

Originally Posted by SBSerpent

I used this very same method to extract a broken exhaust manifold bolt on a 460 BB where the shaft of the bolt was barely proud of the surface of the manifold. Work perfectly. You should have no problem with this method. Bolt will come out easily.

Thanks man....and thats what im hoping. I really think this will be the best method for success. I just hate having to wait three weeks for my buddy with the talent to show up. Lol.

[Sledge]

Sound: The install was pretty easy I did it myself. The instructions for installation are available at the Autowerke link provided by Bob Cowan, and in the form of a downloadable .pdf file (contains words and lots of photos).

Cheers

[Wynn]

Will the differential bracket work on all Backdrafts?

[SBSerpent]

Originally Posted by Wynn

Will the differential bracket work on all Backdrafts?

I've heard that the bolt that comes with the bracket is 12mm whereas the carrier bolt on BDRs is 14mm

[Soundkillr]

Originally Posted by Wynn

Will the differential bracket work on all Backdrafts?

Yes...assuming your car uses the standard bmw e36 rear end. The only thing you need to do is use your old bolt. The new one is to small. You will also need to enlarge the support hole for the bolt and new support.

[Soundkillr]

Originally Posted by 169mph

I had the same thing happened last month. Same Bolt sheared. I’m trying unsuccessfully to extract the end of the bolt out without dropping the differential. Tried to use a dremel tool to cut a groove in the end of the bolt so I could back it out with a flat head. Couldn’t cut a groove deep enough. I think lm going to drop the differential and replace the bushings and upgrade the front bolt.
Thanks Mike

So heres the method im going to try and follow...

https://youtu.be/-8N0y0jVAng

Fast forward to the five minute mark to see what im trying.