AST PSB 406B Manual Transmission Shift Lever Bushing

The AST PSB 406B is a manual transmission shift lever bushing designed to replace worn or damaged OEM rubber bushings in manual transmission shifter assemblies. This aftermarket bushing provides a direct replacement solution for addressing common shifting problems in manual transmission vehicles.

Key Features:

• Polyurethane construction for enhanced durability compared to standard rubber OEM bushings
• Upper shift lever bushing design (smaller of the two-bushing system)
• Addresses common manual transmission shifting issues including gear slop, difficulty engaging gears, and gears popping out
• Designed to restore tight, precise shifting feel
• Direct replacement for worn factory bushings

This shift lever bushing is the upper retainer bushing in the manual transmission shifter assembly. Over time, the original rubber bushing deteriorates from constant use, heat exposure, and age, leading to excessive shifter play and difficulty selecting gears. Replacing this bushing can significantly improve shift quality and eliminate common problems like difficulty engaging third and fourth gears, excessive side-to-side shifter movement, and transmissions popping out of gear. Installation typically requires removal of the shift boot and access to the shifter housing, with the spring retainer cap being removed to access the bushing.