Schwerin
Well-Known Member
- Thread starter
- #16
The Shafts max RPM won't change with rear gearing though. It's going to match engine RPM as that is what is driving it. The shafts speed when reving the engine to 7500 with a 3.27 is the same speed it will spin when reving the engine to 7500rpm with a 4.56.It may not pose a real problem but it is always something to consider when you are spinning the driveshaft faster and faster. At some point you will hit the critical speed limit of the shaft and it will catastrophically fail. Most quality aftermarket shafts are rated to 9,000 shaft RPM which should be more than enough, but some aren't balanced to those speeds(certainly not the stock shaft) so it is questionable how long the shaft will tolerate high speeds.
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