Gearbox oil leak (170S, 1951)

[twigren]

Dear friends,

Discovered an oil leak from gearbox, upper back side.
Oil is apparently leaking from the entry of speedometer cable.

After a day of disassembling things (removing the box and a bunch of things...) , I noticed there are no sealing inside the speedometer entry hole. Cant really understand how the construction is intented to seal and avoid leaks. Speedometer cable (metal), inserted in the metalcase and secured by a sprint screw. I thinks I miss some part here?

Question to you experts;
Shouldn't there be any type of sealing here? If so, what type?

/Thomas

[Henry Magno]

No sealing here, they did later on the pontons. If it's really clean, a little gasket sealer might help on the circumference of the speedo cable end.

[twigren]

Thanks henry