Castrol Hypoy C Gear Oil -- GL5?

[Don Malling <dmallin@attglobal.net>]

I was unaware of the GL4 vs GL5 issues and may have been using GL5 in my 
TR250 transmission and differential.

I used Castrol Hypoy C Gear Oil 80W/90. I assume this is GL5 because the 
label says:

"Castrol Hypoy C Gear Oil is a multi-grade gear lubricant providing 
excellent performance in hypoid gears requiring a GL-5 lubricant"

" Meets the performance requirements of MIL-L/2105C, Ford ESW-M2C-105B 
and Mack GO-G"


I also used whatever gear oil was at the service stations back in the 
70's. When did GL5 come along?

Thanks,

Don Malling

///  triumphs@autox.team.net mailing list
///  or try  http://www.team.net/cgi-bin/majorcool
///  Archives at http://www.team.net/archive