Just like Denny, I to have had Muncie 3 and 4 speed manual transmissions of various kinds throughout my 55 years, but always followed the manufacturers recommendations except after I rebuilt the Muncie 3 speed in my Chevrolet Biscayne. Speaking from previous experience with old Muncie transmissions. Wear out those synchos or keep crunching gears and a rebuild of that heavy chunk of metal behind the bell housing will ensue. Read that Bible we call the Chevrolet truck shop manual....transmission page 7-30 lubricant type: SAE 90. Transmission installation # 12. Fill the transmission with 6 pints of SAE 90 gear lubricant and tighten drain and filler plugs to 30-35 ft.lbs.

Last edited by fixit1958; 04/03/2014 3:10 PM.
"Pay attention to the details! It ALWAYS pays off."

1949 Chevrolet 3100 Series 1/2 ton Pickup
1964 Chevrolet C10 (Ol' Yella) (SOLD)
1958 Chevrolet Biscayne 2 door (SOLD)
1970 VW Beetle