Sonnax Products

3L80 and 4L80E No Walk-Out Case Bushing Over Sized (Machining Required) (34006-OS)

3L80, 4L80E Automatic Transmission Case Bushing (No Walk-Out ) (34006-SP)

Forward Hub Washer (.078" Thick) (5 per bag) (S34232BK) (34298-078)

Reverse Boost Valve Kit (Includes O-Rings) (S34507RK) (34910-01K)

Reverse Boost Valve Kit (“Factory” Style) (S34507RCK) (34910-05K)

Automatic Transmission Pump Pressure Regulator Valve Kit (Uses Sealing Rings S34507PK-1) (S34507PK) (34910-03K) 400, 3L80 1971-UP 4L80E 1991-UP

Boost Valve & Sleeve (Progressive Line Pressure Increase) S34507F 400-LB1

Direct Drum Sleeve (Req T-34838-TL) (Machining Required) S34555E-2 34838-01K

Forward Clutch Hub (Heavy Duty) (S34574E) (34322-01)

Pinion Washer (8 per bag) (S34584A-1B) (34875-03)

Governor (2nd Design) (A34680) (400)

GM Turbo 400 Automatic Transmission 2nd Design Governor (1965-1998) (8623852).