833 4spd repair advice
Can't imagine a rebuilder assembling the fresh parts on his transmission build without assembly lube.
Think about it you would not assemble your engine without assembly lube.
Also like an auto trans, you don't put them together without lubing the parts as you are assembling it. Soaking the clutch discs in oil prior to assembly, you know.
Manual trans . . bearings and bushings synchros, shift forks. You want all those things lubed and moving freely so you can shift it through the gears freely to check to make sure the build works right while still on the bench.