On Wed, 26 Oct 1994, John Wroclawski wrote:
> One other other thing is that the additives used in some gear oil (and
> aftermarket stuff like Slick-50) are incompatable with Laycock
> overdrives. This is because they literally make the oil too slippery,
> and the clutches in the overdrive can't get a grip and eventually burn
> up. Engine oil doesn't have this problem. I'd sort of expect that gear
> oil which claims to be OK for limited-slip differentials doesn't
> either, but I don't know of very much detailed information (an
> exception is RedLine; their engineers seem to actually know what a
> Laycock overdrive is, at least...).
And what do the good folks at Redline recommend for use in an overdrive
transmission? I've been using Amsoil 80W-90 synthetic gear oil in my
TR4's A-type overdrive for the past 40,000 miles or so. Prior to that I
used normal SAE90 gear oil (per the owners manual).
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Chip Old 1948 M.G. TC TC6710 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO (daily transportation)
feold@umd5.umd.edu
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