Quote:
Originally Posted by FEandGoingBroke
If the damage is THAT bad , what the hell is a little scatter shield going to do?
I'm going to put one on my Falcon ASAP!  |
It'll do a hell of a lot better job of stopping 99% of the shrapnel than that cheezy sheet metal floor will!
By the way, most of the 3 speed automatics use a sprag. When the sprag breaks, it can do pretty much what that 727 did, though the 727 is worse because of the cast drum. When the sprag breaks or stops working, the drum spins backwards about twice (maybe more...I remember 2.7 times engine speed on the 727) the engine speed. By the time you leave the line, the engine revs to 7000+ because of freewheeling, which means that drum is spinning 14000 RPM give or take a few. And being that the 727 uses a a cast drum, it just explodes and takes the entire trans with it. One of the things that are a root cause is that most aftermarket valve bodies don't apply the low band in low gear. That lets the sprag or one-way take ALL of the torque. If it fails, it happens.
I have also seen a C4 bust. It was a reverse manual transbrake VB that was in a 6.2X Fox Mustang. Guy released the TB and boom. Entire rear half of the case was on the track. I was working the burnout area when it happened. When the car was finally moved, I personally picked up the park mechanism, rear planetary, output shaft, governor, and the rear case with broken sprag still bolted to it. Well, parts of it anyway. Didn't exit into the car, though. Does a TB valvebody in a C4 apply the low band or no? The C4, though, uses smaller diameter drums that are steel, not cast. The drums usually don't fail, just the outer race on the sprag breaks.
