TH-125 / 3T40

TH125 Super Master Rebuild Kit for TH-125 and 3T40 automatic transmissions, 1980 and later. Includes frictions, steels, band, gasket and seal set, bushings, thrust washers and Automatic Transmission Filter for...

When a 3T40 unit comes in for a pan-drop service, having the correct pan gasket and a fresh Automatic Transmission Filter ready together saves a second parts run and keeps...

External leaks and lost line pressure both trace back to gaskets and seals that hardened with age and heat.TH125 Valve Body (Upper Lower) Gasket. This set restores the containment the...

The cost of a wrong part is never the part; it is the second teardown.TH125 spring intermediate servo cushion. This is the correct piece for the unit code on the...

TH125 Overhaul Kit for TH-125 and 3T40 automatic transmissions, 1980 and later. Includes gasket and seal set for a complete overhaul. 1 pieces in 1 components. Overhaul Kit for TH125...

Sprag cages crack before the elements do, and the crack is invisible until it separates.TH125 sprag 125 low roller clutch. This returns the position to its designed holding torque.Race surface...

Complete Transmission Rebuild Kit [1980-UP]automatic transmission kit for service and rebuild applications.What's Included:- Th 125 125c band flex flex (1.74wide) 1980-up (CBF-040190)Vehicle Compatibility:- Century [82-84] 2.5, 2.8, 3.0, 3.8, 4.3-...

TH125 3T40 Rebuild Kit for TH-125 and 3T40 automatic transmissions, 1980 and later. Includes frictions, steels, band, gasket and seal set and Automatic Transmission Filter for a complete overhaul. 29...

Internal specifications change mid production, which is why the unit code matters more than the model year.TH125 TH700 125 (universal) detent cable. The part is matched to the position it...

A rebuild with reused seals is a rebuild that comes apart again.TH125 case cover to case (large outer gasket) gasket. This set returns every sealing point a teardown opens to...

Old sealing material gets brittle in storage as well as in service, which is why age matters as much as mileage.TH125 th 125 bottom pan duraprene side pan (valve body...

Apply pressure that reads correct at the port can still be lost at the piston.TH125 accumulator piston oe size (1-piston 1-pin) pin kit. The seals are bonded to the piston...

Fluid on the case is the visible half of the problem; the other half is the pressure that never reached the clutch.TH125 Bottom pan Cork pan Gasket. The kit covers...

A part that is close but not correct fits on the bench and fails in the vehicle.TH125 pump shaft 6 bearing w seal. This is the correct piece for the...

Heat distorts a steel plate long before it discolors, which is why a pack that looks reusable often is not.TH125 pump (15 spline w solid steel collar) (replaces stamped) l1984-up...

Replacing a shaft seal costs minutes on the bench and hours once the unit is in the vehicle.4T65E enger side booth side aftermarket metal clad seal. The lip is formed...

Internal specifications change mid production, which is why the unit code matters more than the model year.TH-125 Rotor Shaft Short 15 Teeth. This part matches the stock in fit and...

The outer shell of a seal rusts in its bore and walks out under pressure long before the lip fails.TH125 axle (both sides) metal clad seals. This returns the sealing...

Seals at the shaft are the last line between the fluid and the driveway.TH125 th 125 front (converter hub) metal clad seals. This restores the seal between the unit and...

Complete Transmission Rebuild Kit [1980-UP]automatic transmission kit for service and rebuild applications.What's Included:- Bushing kit 125 125c 1980-up (C8C-040030)Vehicle Compatibility:- Century [82-84] 2.5, 2.8, 3.0, 3.8, 4.3- Century [85-96] 2.2,...

TH125 3T40 Master Rebuild Kit for TH-125 and 3T40 automatic transmissions, 1980 and later. Includes frictions, steels and gasket and seal set for a complete overhaul. 27 pieces in 7...

Parts within one transmission family are often dimensionally different by build date.TH125 Rotor Shaft 20 Teeth. It is cataloged against the unit code rather than the vehicle.Parts are cataloged by...

Rubber that has cycled through enough heat stops returning to its shape, and a seal that does not return does not seal.TH125 Gasket liga servo intermedia interna 1.089 c 2001....

A worn sealing ring leaks only while the shaft turns, which is why the leak never shows on the bench.TH125 ring kit. The rings are sized to the groove and...

A pack that slips under throttle is telling you the friction material is done, whatever the fluid looks like on the stick.TH-125 Th-125 3T40 Clutch Pack. This pack restores the...

Fluid loss at a shaft seal is slow enough that the unit is damaged before anyone notices the level.TH125 front (converter hub) aftermarket metal clad seal. This replacement returns the...

Getting the right piece the first time is what keeps a rebuild on schedule.TH125 pump rotor (metal) ring. It is cataloged against the unit code rather than the vehicle.Internal specifications...

Getting the right piece the first time is what keeps a rebuild on schedule.TH125 3 4 hv019 chain. This part matches the stock in fit and finish.Internal specifications change by...

Getting the thrust washers right in a 3T40 unit is not a detail to overlook: worn or incorrect washers throw off end-play specs and accelerate wear on every rotating component...

Worn bushings let shafts run off center, and the side load that follows wears seals and drums much faster than normal.TH125 bushing converter hub. The set covers the wear positions...

TH125 125C Complete Transmission Rebuild Kit [1982-UP]automatic transmission kit for service and rebuild applications.What's Included:- Th125 125c band flex Raybestos (kevlar) 1982-up (CBF-40190R)Vehicle Compatibility:- Century [82-84] 2.5, 2.8, 3.0, 3.8,...

When clutch slip or a soft engagement points to a worn friction module in a 3T40 TH125 unit, replacing the clutch pack with a correctly specified piece is the direct...

Rubber that has cycled through enough heat stops returning to its shape, and a seal that does not return does not seal.TH125 Bottom pan duraprene pan Gasket. The rubber is...

A component sourced by appearance instead of by unit code is a repair waiting to come back.TH125 Speedometer Gear Green. This is the correct piece for the unit code on...

Off center rotation wears sealing rings at an angle, and angled rings never seal again.TH125 case cover (channel plate) sleeve. These bushings return the shafts to running on center.A bushing...

The band carries a full gear on its own, so when it thins out that gear is the first thing to disappear.TH125 band (plastic) anchor plug. This band restores the...

A part that is close but not correct fits on the bench and fails in the vehicle.TH125 pump rotor. The piece is produced to the dimensions the position requires.Parts are...

Steel plates lose their flatness from heat cycling, and reusing warped steels with new frictions shortens the life of both.TH125 steel forward clutch .050 (waved). This steel set is manufactured...