1986-1988 Corvette 4+3 Overdrive Switch and Harness

Parts You Will Need

• 

  1984-1988 Back-up Light Switch Manual Transmission

• 

  1984-1988 C4 Manual 4+3 Transmission with Syncros Rebuild Kit

• 

  1984-1988 C4 4+3 Transmission Overdrive Unit Pan Gasket

• 

  1988-1996 Manual Transmission Lower Shift Boot

Parts We Recommend

• 

  1986-1988 Clutch Master Cylinder To Slave Cylinder Hose

• 

  1984-1988 Clutch Master Cylinder

• 

  1984-1988 Clutch Slave Cylinder

1986-1988 4+3 Overdrive Switch and Harness

Reproduction 1986-1988 4+3 Doug Nash Overdrive Switch and Harness Assembly. Over the years of use and abuse, many 4+3 transmissions no longer function as designed. Switches and cables deterioate or are just not used. This Switch and Harness Assembly is a step in getting your Doug Nash 4+3 transmission operating to factory specificatons.

During the critical early years of Corvette Racing, the 4+3 was a leading edge advantage for Corvette winning the 1984, 1985, 1986, 1987, 1988 SCCA Showroom Stock Endurance Series Championships.

RPO MM4 Production Quantities By Year:

• 1984 RPO MM4  6,443
• 1985 RPO MM4  9,576
• 1986 RPO MM4  6,835
• 1987 RPO MM4  4,298 
• 1988 RPO MM4  4,282

Also known under these part numbers: (For reference only)

• 686420042372
• CS203