TH400 (3L80) 1964-90, TH425 1966-78

When the rear reverse band in a 4L80E, 4L85E, or TH400 automatic transmission is worn, glazed, or burned, this rigid smooth-lining band is the direct replacement for that apply position....

Seals do not usually tear; they take a set, and a set seal leaks at exactly the pressure the circuit needs most.TH400 bottom pan cork pan gasket. This set restores...

TH400 Super Master Rebuild Kit for TH400 automatic transmissions, 1965 and later. Includes frictions, steels, band, gasket and seal set, bushings, thrust washers and Automatic Transmission Filter for a complete...

TH400 3L80 Master Rebuild Kit for TH400 automatic transmissions, 1965 and later. Includes frictions, steels and gasket and seal set for a complete overhaul. 12 pieces in 5 components. This...

TH400 3L80 Rebuild Kit for TH400 automatic transmissions, 1965 and later. Includes frictions, band, gasket and seal set, bushings and Automatic Transmission Filter for a complete overhaul. 5 pieces in...

When the clutch pack in a TH400 or 3L80 unit has worn past its service limit, this stage 1 red friction clutch pack gives the technician a direct replacement without...

When a TH400 or 3L80 automatic transmission comes apart for a pan drop or a full rebuild, the pan gasket and the screen are two pieces that get replaced as...

For TH400 automatic transmissions. A seal that has hardened on the lip leaks under pressure and looks serviceable on the bench.4L80E rear (2.705 od) 1.829 id (large truck type) (without...

When the rear reverse band in a 4L80E, 4L85E, or TH400 is worn or damaged, the holding capacity in reverse drops and shift feel suffers - this single rigid band...

When a rebuild calls for only the rear reverse band and nothing else, this listing delivers exactly that: one rear reverse band, part number 8681820, sized and specified for TH400,...

Fluid on the case is the visible half of the problem; the other half is the pressure that never reached the clutch.TH400 pump gasket. This is the sealing set a...

An electrical fault in the shift circuit shows up as a stored code, a harsh shift or a gear the unit will not select.TH400 solenoid valve body detent short wire....

Shaft wobble from a worn bushing shows up as a pressure leak long before it shows up as a noise.TH400 washer kit. Each piece is sized to the bore it...

TH400 Rebuild Kit Performance Heavy Duty for TH400 automatic transmissions, 1965 and later. Built around Stage 1 Red Clutches. Includes Stage 1 performance frictions, band, gasket and seal set, bushings...

A clutch pack holds torque only if the steels between the frictions are flat and parallel, and used plates rarely are.TH400 hi-performance steel module kolene. The plates are produced to...

TH400 TH375 Complete Transmission Rebuild Kit [1964-UP]automatic transmission kit designed for service or rebuild applications, providing reliable fit and consistent performance when installed according to specification.What's Included:- 10x Th400 425...

Sticking valves are why a unit shifts correctly cold and misbehaves once it warms up.TH400 shift kit 1965. This returns the hydraulic side of the unit to specification.Checkball location is...

TH400 Super Master Rebuild Kit Performance Heavy Duty for TH400 automatic transmissions, 1965 and later. Built around Stage 1 Red Clutches and Kolene Steels. Includes Stage 1 performance frictions, steels,...

When the front band in a TH400 or 3L80 automatic transmission shows glazing, cracking, or uneven wear, this woven flex band gives you a direct replacement built to handle the...

TH400 Overhaul Kit for TH375, TH400 and TH475 automatic transmissions, 1965 and later. Includes gasket and seal set for a complete overhaul. 1 pieces in 1 components. Overhaul Kit for...

When the controller commands a shift and nothing happens, the circuit is usually the culprit, not the clutch.TH400 solenoid conector. Response time and resistance match the stock, which keeps the...

A worn or migrating case bushing in a 4L80E or 4L85E automatic transmission can allow shaft movement that wears surrounding bores and leads to pressure loss and repeat failures. This...

When the front band in a TH400 or 3L80 automatic transmission wears out, the unit loses its ability to hold the drum firmly during apply, and the result shows up...

When a single bearing is all that stands between a clean rebuild and a come-back job, sourcing the right piece without buying a full kit saves time and keeps the...

When the Automatic Transmission Filter in a TH400 or 3L80 unit is clogged or worn, fluid restriction starves the hydraulic circuit and the transmission begins to show it through soft...

modulator 250 250c 350 350c single red stripe 1969-86nanautomatic transmission component designed to support proper operation, fit, and durability when installed according to specification.What's Included:- Modulator 250 250c 350 350c...

TH400 Banner Rebuild Kit Performance Heavy Duty for TH400 automatic transmissions, 1965 and later. Built around Stage 1 Red Clutches. Includes Stage 1 performance frictions and gasket and seal set...

When the diagnosis points to a single failed sealing ring in a TH400 or 3L80 automatic transmission, ordering a full overhaul kit means paying for components you do not need....

A unit that slips, shudders or drops a gear is telling you the wear items are past their service life, not that one part failed.TH400 governor gear pin kit. This...

Pressure that reads correct at the test port can still be lost inside the body.TH400 ( competition) reprogramming kit. Bores, valves and plate are matched as an assembly.Separator plate specification...

Apply pressure that reads correct at the port can still be lost at the piston.TH400 (3L80) th 400 (late no legs on piston) accumulator assembly. These pistons return the pack...

TH400 Master Rebuild Kit Performance Heavy Duty for TH400 automatic transmissions, 1965 and later. Built around Stage 1 Red Clutches and Kolene Steels. Includes Stage 1 performance frictions, steels and...

When a sealing ring in a TH400 or 3L80 unit wears out or cracks, internal pressure drops and the clutch circuits stop responding the way they should, and this single...

For TH400 automatic transmissions. Automatic transmission components are unit specific, and the differences are rarely visible side by side.4L80E output carrier (black plastic) silencer ring. This part matches the stock...

For TH400 automatic transmissions. Replacing a shaft seal costs minutes on the bench and hours once the unit is in the vehicle.4L30E th 400 speed-o shaft (without spring) .. metal...

For TH400 automatic transmissions. The outer shell of a seal rusts in its bore and walks out under pressure long before the lip fails.42RLE th 400 rear 1 11 16...

For TH400 automatic transmissions. Replacing a shaft seal costs minutes on the bench and hours once the unit is in the vehicle.ALUMINUM POWERGLIDE th 400 425 front metal clad seals....

For TH400 automatic transmissions. Old sealing material gets brittle in storage as well as in service, which is why age matters as much as mileage.4L80E th 400 pump body (viton)...

TH425 Overhaul Kit for TH400 automatic transmissions, 1966 to 1978. Includes gasket and seal set for a complete overhaul. 1 pieces in 1 components. TH425 automatic transmission: overhaul Kit for...

For TH350 automatic transmissions. A shudder that comes and goes at light throttle is the lockup clutch telling you it is done.TH250 Torque Converter Nut. This restores the torque multiplication...

For TH400 automatic transmissions. A one way clutch that has started to roll over is already scattering material through the unit.4L80E planet used front (roller type sprag). This returns the...

The parts that wear in an automatic transmission wear together, so replacing them together is what makes the repair last.TH400 Friction and Steel Clutch Module Rebuild Kit 3L80 Transmission. This...

A worn or glazed friction module in a TH400 or 3L80 unit is one of the most direct causes of clutch pack slippage and inconsistent shift feel, and replacing it...

A restricted Automatic Transmission Filter starves the pump and the pressure loss shows up as delayed engagement and slipping under load.TH400 TH400 Automatic Transmission Filter Kit with Pan Gasket Automatic...

Shift timing lives in the valve body, and worn bores put that timing out of range.TH400 2 stage posi-shift 1965- Valve Body Kit. This returns shift timing and pressure control...

A separator plate with a worn orifice changes the apply rate of every shift it controls.TH400 w plate) (Improved) valve body kit. The bores and the separator plate are matched...

Keeping fluid clean inside an automatic transmission is not optional, and the right Automatic Transmission Filter for the right build date is what makes that possible. This Automatic Transmission Filter...

When the case bushing on a TH400 or 3L80 unit is worn, shaft play increases and the surrounding bore and seals take damage that compounds the stock failure, so replacing...

Seals at the shaft are the last line between the fluid and the driveway.TH400 front aftermarket metal clad seal. This returns the sealing point to its stock containment.A grooved shaft...

When the extension housing bushing on a TH400 or 3L80 unit wears out, output shaft movement increases and seal life drops sharply, so replacing this single component at the right...