ACDelco 28290129 Automatic Transmission Manual Valve Lever

The ACDelco 28290129 is a GM OE replacement Automatic Transmission Fluid Pressure Manual Valve Lever, also commonly referred to as a transmission manual shaft lever or detent lever. This precision-engineered component is part of ACDelco's Professional OE line, manufactured to the same specifications as the original General Motors factory part.

The manual valve lever plays a critical role in the automatic transmission's valve body assembly. It mechanically links the gear selector (shift linkage) to the manual valve inside the valve body, directing hydraulic fluid pressure to the appropriate circuits for each selected gear range (Park, Reverse, Neutral, Drive, etc.).

Key Features:

• Direct OEM replacement — manufactured to original GM specifications
• Ensures precise alignment between the gear selector and the transmission valve body
• Helps maintain proper hydraulic fluid pressure routing for smooth gear engagement
• Durable construction designed to withstand the demands of automatic transmission operation
• Part of the ACDelco Professional line, delivering OE fit, form, and function

The ACDelco 28290129 manual valve lever is designed for use in specific General Motors vehicles equipped with compatible automatic transmissions. It is an essential component when rebuilding or servicing the transmission valve body, and is recommended as a replacement whenever the shift linkage exhibits play, mis-indexing, or gear-selection irregularities attributed to a worn or damaged lever.