[Tigers] synthetic gear lube

[David Sosna]

Mike:
March 2008 Classic Motorsports had a good article on page 111 regarding 
the benefits of synthetic lube in a classic car transmission. 
The article didn't mention leakage problems like you're having, though.
It did mention using a non-slip GL-5 lube (usually used in 
differentials, it says, but goes on to say that the non-slip version 
works well with the synchronizers) in "a heavily loaded gearbox such as 
those found in older domestic Ford and Chevy units."
Don't know if the Red Line 75W90 NS GL-5 mentioned might be less likely 
to leak than the Mobil 1, but if you're wanting a synthetic in your 
trans, it might be worth a try before you go back to a conventional lube.

Best Regards
David Sosna (not shilling for Red Line or Classic Motorsports--grin)

Mike Michels wrote:
> What's the general thought on synthetic gear lube in a stock toploader? I had
> mine rebuilt recently, filled with mineral based 80/90 for break in. No leaks.
> Then switched to Mobil 1  75/90 to improve shift quality when cold. But now
> the seals weep. Should I go back to mineral based 80/90?