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Old 11-03-2008, 07:55 AM   #84
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Originally Posted by jhargis View Post
Though the idea behind this study of the case was as a proof of concept, and primarily to see where the weaknesses are. Since I was interested in designing a reinforcement when I started this project, I wanted to know at which locations I should apply reinforcement rather that just blindly bolting chunks of steel here and there. I was also very interested in being able to test the 5mt without the reinforcement as a baseline, and then see if there were any improvements with the reinforcement installed. This was purely a relative data comparison, I didn't really need to find exact figures against a set point away from the transmission under real-world driving conditions with a particularly high precision... Just basically needed to answer 3 questions. Does it flex? Where? And does the reinforcement help?
Fair enough. I didn't doubt you knew the shortcomings, and I think it's a pretty cool thing to actually build a rig to test. Have you considered adding bracing to simulate the trans being bolted to an engine block? That might bring to light different locations of problems.

Do you think the bracing will help with the issue of wheel-hop-induced-case-breakage (where the front diff actually jumps and cracks the case around the output stubs/sockets)?

Any way you look at it though, smoothly applying 230ft./lbs. of continuous torque to the input shaft, even with the output shafts completely bound up is probably nothing close to the kind of force the transmission sees if you drop the clutch from a high rpm with the car at a stop.
Now THAT would be a cool test to perform to actually find out. Do you have anything that would allow you to do that?
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