Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 700r4 lost 3rd gear
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Old 10-02-2012, 03:53 PM
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Thanks for your reply. I see what you mean about the shafts being different. The links you gave me do show much better prices on the 300M shafts. They're still a little pricy though. I see though that GM released the heat treated shafts for the 4L65. They didn't release anything like that for the 700R4. Therefore, I may have no option but to use the 300M shaft if I want to install a hardened shaft. The turbine shaft that's in the trans now has obviously held up to the motor. What I'm thinking though is that I don't want to put the OE shaft in the Smart Tech drum, just to have to replace it later when I build a stronger motor. To use the 4L65E shaft, what other parts would need to be changed?
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