Broken Transmission Cross-member

[xxxJohnBoyxxx]

I have a heavy modified 1997 318is M44 5-speed. I snapped a u-joint on the tail-shaft Saturday and replace the staft with a Beyer driveline. I now noticed the aluminum transmission cross member is snapped on the passenger side. No broken mounts on tranny or motor. Any ideas what would cause this?

I think the shop broke it when lifting the car....

[CirrusSR22]

What transmission mounts do you have? I don't see anything short of solid mounts actually breaking the cross-member.

[mohaughn]

I would say the amount of power you are generating and launching probably caused it. BMW race cars usually replace that mount with an upgraded aftermarket version.

http://www.harrisonmotorsports.com/s...products_id=90

It says it is for an M3, but they have these little plates that allow it to fit on a non m-3.

[xxxJohnBoyxxx]

Originally Posted by mohaughn

I would say the amount of power you are generating and launching probably caused it. BMW race cars usually replace that mount with an upgraded aftermarket version.

http://www.harrisonmotorsports.com/s...products_id=90

It says it is for an M3, but they have these little plates that allow it to fit on a non m-3.

Taking it to the welder today. I'm having him fix and add strength. When I removed it I found it weight less then a pound and very thin. It is weak at best