Valve Body Parts & Shift Kits

Ford and GM Transmission Checkball .25" 1/4" (Material Imidized Plastic) See Description for listed Transmission Applications (Pack of 10)

Sonnax part number: 10000-08 200-4R, 32RH, 45RFE, 46RE, 46RH, 47RE, 48RE, 4L60, 4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E, 4R100, 4R44E, 4R55E, 4R70E, 4R70W, 4R75E, 4R75W, 4T60-E, 4T65-E, 545RFE, 5R44E,...

GM Mechanical Modulator (Designed for TH400 Swaps from 700R4 on 6.2L Diesels)

Part number: 40M A mechanical modulator from Fitzall that replaces the vacuum modulator when swapping a 700-R4 transmission onto a TH400 in 6.2L diesel engine conversions. It lets the TH400 use...

TH400 Detent Lever

Part number: TH400DTLFits: TH400 A used detent lever assembly for Turbo 400 (TH400) automatic transmissions, sold by Quality Used Hard Parts. It is a good-used part rather than new or remanufactured,...

TH400 SHIFT KIT® Valve Body Repair Kit

Part number: SK400Fits: TH400 A SHIFT KIT valve body repair kit from TransGo, fitting all TH400 transmissions built 1965-on. It addresses soft or late shifts, 3rd clutch burn-up, a rough 1-2 shift,...

TH400 Transmission Stick Shift Reprogramming Kit (1965-1992) TransGo

Part number: 400-3Fits: TH400 · 1965-on TransGo Turbo 400 Reprogramming Kit with manual shift control. It fits all 400 transmissions from 1965-on and gives stick-shift, full manual control for full...

TH400 Transmission Reprogramming Kit - TransGo

Part number: 400-1&2Fits: TH400 A reprogramming kit for GM TH400 automatic transmissions, made by TransGo. It includes parts to adjust shift feel, hold gears longer under load, and firm up clutch...

TH400 Transmission Reprogramming Pro-Race Kit - TransGo

Part number: 400-PROFits: GM TH400 TransGo reprogramming kit for the TH400, for street or full-race use. It keeps automatic shifts with adjustable shift timing and feel, holds 1st and 2nd to any RPM,...

TH400 Line Pressure Booster Kit | Sonnax

Sonnax part number: 400-LB1 Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive...

TH400 Boost Valve Kit (No O-Rings Style) Sonnax

Sonnax part number: 34910-05KFits: TH400 Factory Style, No O-Rings Vehicles with a THM 400 transmission frequently have poor line rise, soft 1-2 and/or 2-3 shifts,and/or Reverse engagement...

TH400 Solenoid Case Connector, 2-Prong w/o Variable Pitch (1970-1982) 8629502

Part number: 34444CFits: TH400 · 1970-1982 A case connector with 2-prongs and without variable pitch, in the style with the insulator, for GM TH400 transmissions built from 1970 to 1982. It replaces...

TH400 Solenoid Case Connector, 1-Prong Small OD (1964) 2977975

Part number: 34444Fits: TH400 A replacement case connector for the GM TH400 automatic transmission built in 1964, featuring a 1-prong terminal and the small outside-diameter body style. OEM number...

TH400 Solenoid Case Connector, 2-Prong w/ Variable Pitch (1965-1967) 2984091

Part number: 34444BFits: TH400 · 1965-1967 2-Prong style case connector with variable pitch for TH400 automatic transmissions manufactured from 1965 to 1967, replacing OEM part number 2984091. This...

TH400 Solenoid Case Connector, 1-Prong Large OD (1968-1998) 24205373

Part number: 34444AFits: TH400 · 1968-1998 A 1-prong solenoid case connector with a large OD for TH400 automatic transmissions built 1968-1998, sized for the larger-OD connector position. It carries...

TH400 3L80 Valve Body Detent Kickdown Solenoid (1965-UP)

Part number: 1414AFits: TH400, 3L80 · 1965-up An aftermarket kickdown/passing-gear detent solenoid for GM Turbo 400, TH375 and TH475 automatic transmissions built from 1965 on, and for all-year 3L80...

GM Turbo 400 Transmission Valve Body Shift Kit w/ Plate by Superior

Part number: STP-K400-WPFits: GM TH400 Valve body shift kit with separator plate for the GM Turbo 400 (TH400), with regular and heavy duty applications in the same kit. It works with 6 and 7 check...

GM Turbo 400 Transmission Valve Body Shift Kit by Superior

Part number: STP-K400Fits: GM Turbo 400 Superior valve body shift correction kit for GM Turbo 400 transmissions, with regular and heavy-duty setup options in the same kit. It includes metal rings for...

GM 700R4 TH350 TH250 TH400 Governor Shift Point Package by Superior

Part number: STP-K018Fits: 700R4 / TH400 / TH350 / TH350C / TH250 / TH250C Governor shift point package for GM 700R4, TH400, TH350, TH350C, TH250 and TH250C transmissions. Its 6 weights and 6 springs...

GM TH400 TransAction Shift Kit by Fairbanks (1965-UP) Heavy Duty, Street/Strip, Manual Control & Full Competition

Part number: STP-20812Fits: GM TH400 · 1965-up Fairbanks TransAction shift kit for 1965-up GM TH400 (Turbo 400) transmissions, with 4 levels of performance: heavy duty, street and strip, full...

GM TH400 Posi Shift Kit by Fairbanks (1965-UP) Heavy Duty & Street/Strip

Part number: STP-20806-2Fits: GM TH400 · 1965-UP Fairbanks Posi Shift 2 Stage kit for the GM Turbo 400 (TH400), 1965-UP. It firms up the 1-2 and 2-3 shifts and improves overall performance in heavy...

TH350/C TH400 T12 C4 C5 C6 FMX T8 MX-TD Modulator Hose (1964-1986) C1AZ-7B087-E

Part number: 44162Fits: TH350/C, TH400, T12, C4, C5, C6 · 1964-1986 A modulator hose elbow fitting for TH350/C, TH400, T12, C4, C5, C6, FMX, T8 and MX-TD transmissions built 1964-1986,...