I keep reading the same thing about GL-5 and brass synchros. I'm glad I did some research because both My user manual and factory service manual specify "GL-4 or higher" for all fluids. Guess I'll order a few quarts of MTL or MT-85, or go cheap with a jug of the StaLube 85-90, seems a little thick but reviews are good. The old stuff in there now takes a few mins to warm up when it's freezing anyway (prolly used the same stuff last time, but that was a loong time ago when i first got the truck).

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Last edited by Maciek; 01/25/17 10:24 PM.

'88 Raider - 250+K | 2.6L G54B; no balance shafts, non jet-valve head, ARP head studs| Weber 32/36 DFEV | Pacesetter 4>1 | 2 1/4" magnaflow | 32" BFG A/T | 2" bar crank & add-a-leaf | +2 SkyJackers | bumpstop del | Optima Yellow-Top | Curt GenII receiver