It's a 915
. Check for leaks at seals, and crack's in cases. Spin one of the out-put flanges to see if it spins free. Really the only way to know is a partial tear-down. (like draining oil and taking nose cone off)
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG