" From: Ken Ames <ameskg@xxxxxxxxx> " " What's the recommended? GL4? " " Napa has a house brand that says GL3,GL4,GL5 on the bottle and also extreme " pressure which makes me think 'hypoid' which may not be good for transmissions. " (5.39/litre) " They also have an Amsoil manual tranny oil that actually mentions the T176 on " bottle but it's 13$+/litre. the t176 is a ford toploader - ford sold tooling etc to tremec in the mid '70s, then turned around and bought trannies [the srod] back. but tremec was free to sell to others, which led to the t150 3sp in amcs. [all the big 3 used 3sp toploaders] the t160 was a hd 3sp for big blocks in the mid '60s, soon dropped. ford toploaders, including the srod, also have model numbers in the t170 series. tremec developed the srod into a 5sp. combining some of the big-block toploader tech, some versions are rated for 600 ft-lbs. if the synchros are still the same, old skool gear oil would be my guess. http://www.5speeds.com/toploader.html says that ford and jeep innards swap, which makes me think they share lube spec too. -- you also have to watch out - if the ep additives are sulfur based, they can eat the synchros in trannies like the jeep ax15. it needs a sulfur-free oil, iirc gl3. also iirc, pennzoil 'synchromesh' was the gm and mopar oem lube, but that might've been for the nv3500 family. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com