I have a (non Super) T-10 behind my 289. I works well without noise. Shifts well and does everything it should. The issue is that while in 3rd gear and slowing down 25-30 it will gently "pop" out of gear into neutral. I've replaced both sliding syncro assemblies, the blocker rings (brass Syncro rings) and all bearings, shims etc. I've been told that possibly the "points" on the 3rd speed gear are bad and are preventing the sliding syncro assy from being retained when the torque is no longer beng fed through the gearbox. Im running old school gear
oil. Any suggestions? I've adjusted the detent, levers etc.
Who on the West Coast is well known for T10 parts and repairs. I realize the old T10s are not as popular as a Toploader, but I'm having a hard time finding someone that specializes in them.