the Pennzoil is GL4.
it is not GL5 at all , not for axles at all.
the issues is many GL5 axle lubes can wreck the brass synco rings inside (eats them)
or at the least cause them to hang up, (seen and balky shifts or grinds)
the best GL4 is the one you like, by feel'
the other gross error is using GL4 Synthetic lube on any old box, the synros will now slip, and fail to match speeds. causing, slow shifts or far worse
most stores dont even carry manual gear box lubes
the excuses is nobody drives them (lame no?)_
it is not GL5 at all , not for axles at all.
the issues is many GL5 axle lubes can wreck the brass synco rings inside (eats them)
or at the least cause them to hang up, (seen and balky shifts or grinds)
the best GL4 is the one you like, by feel'
the other gross error is using GL4 Synthetic lube on any old box, the synros will now slip, and fail to match speeds. causing, slow shifts or far worse
most stores dont even carry manual gear box lubes
the excuses is nobody drives them (lame no?)_
http://www.fixkick.com