Simon Smith Posted May 16, 2021 Share Posted May 16, 2021 I'm about to change the ATF in my gearbox, but I won't be draining the extension housing and cleaning the filter this time round as I know the thread is hanging on by the skin of it's teeth. I know I could chemical metal it back in, but wondered if anyone had come across a better repair that can be done with the gearbox in the car. I know that our local garage has oversize drain plugs and taps, but they don't go that big. Quote Link to comment Share on other sites More sharing options...
pete3000 Posted May 16, 2021 Share Posted May 16, 2021 re-tap and helicoil? Quote Link to comment Share on other sites More sharing options...
Jim young Posted May 16, 2021 Share Posted May 16, 2021 Do you get helicoils in m30 or what ever the thread is , but it's big. I did not know you could get them that big but you live & you learn Quote Link to comment Share on other sites More sharing options...
Sigi_H Posted May 17, 2021 Share Posted May 17, 2021 A helicoil in that size is not the single problem. You need a tool for cutting the bigger thread and a special tool to set it in as well. Sounds pretty expensive, if you can't find a workshop which already owns the tools. Quote Link to comment Share on other sites More sharing options...
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