Hi,
Should I have my 16V 5-Speed Getrag tranny rebuilt to handle the power from my turbo build up? It functions perfectly with no grinding during shifts or anything like that. What can be done to strengthen the tranny? I know these transmissions are tough, but how long would they be able to handle 400+ HP? Is there anything I should measure to see if I should rebuild it or not?

Also, what kind of oil should I use for the tranny and the rear diff? Are there any types/brands that are highly recommended for this tranny? Anything to stay away from?

Thanks!

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87 190E EVO II Turbo