Fellow Member (>400)
Join Date: Jun 2000
Location: La Jolla, California
Thanked 12 Times in 10 Posts
I Broke My Rear Subframe and Driveshaft!
My Dinan S2 made some scary driveline noises the other night. I suspected that I somehow had either blown up my 3.45 Ring and Pinion or had a problem with one of the Rear Halfshafts or CV Joints.
I had the car towed to my local dealer the next morning. Imagine my surprise when they called me with the news that the rear subframe/"differential carrier" (i.e. the structure to which the rear differential and rear suspension attach) was irreparably broken! To boot, the rear section of the driveshaft also sustained a breakage.
I never do "hole-shots" with the car. Sometimes I nail the throttle while doing about 10-15 mph (about 3,000 rpm) and light up the tires. While doing this, I sometimes get "axle-hop"
in addition to wheel-spin (i.e. maybe the rear subframe has been getting weaker and weaker for awhile?).
The only other variable that I can think of that might have contributed to this failure is the Pirelli PZero Corsa tires that I've been running lately. Maybe the combination of the extra Dinan S2 extra bhp/torque with the sticky Corsa tires are what did me in?
I don't know if my case is just some sort of aberrational "dumb blind luck." Has a similar occurence ever happened to anyone else? While I sometimes drive my car hard and aggressively, I don't abuse and thrash it to the point of deliberately trying to break it. Unfortunately, my car has 61,000 miles and is out of warranty. Even if this breakage occurred during the period when the factory warranty was still in place, my dealer told me that this situation WOULD NOT have been covered (due to the extra power of the S2 mods). I can only imagine the saga that would've been involved to get Dinan to "match" the factory warranty....
How come I've hadn't heard of any similar breakages for the supercharged E39 M5s that probably make close to 50% more torque than my S2?