Thread: Roush 427 IR
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Old 10-26-2014, 04:27 PM
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Location: Cobourg, Ontario, Canada,
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Originally Posted by jhv48 View Post
Yes, that Tremec 3550 is a bit on the fragile side for the power your engine can put down. Most will choose a beefier Tremec TKO (it replaced the 3550 and was built to be stronger and smoother than the 3550) to bolt that engine to. What's the final drive ratio of his fifth gear? Should be either .68 or .82.
I don't know the 5th gear on this car but can find out.
Am I at risk with the Tremec 3550?

Thanks
Mike
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