Products

4L80E Rebuild Kit Performance Heavy Duty for 4L80E and 4L85E automatic transmissions, 1990 to 1996. Built around Stage 2 Blue Plate Clutches. Includes Stage 2 performance frictions, band, gasket and...

When the extension housing bushing wears, the output shaft gains side play that accelerates seal wear and leads to fluid loss at the rear of the unit. This is a...

A worn forward drum bushing in a 4L80E or 4L85E allows the drum to walk in the bore, which throws off clutch pack end play and leads to soft or...

A component sourced by appearance instead of by unit code is a repair waiting to come back.4L80E Center Support, (W/Lube Hole, W/Shim Type) 1999-Up 4L80E. This is the correct piece...

When stock friction material starts glazing or holding inconsistently in a 4L80E or 4L85E, swapping in a Stage 1 red clutch pack is one of the first moves a transmission...

When the clutch pack in a 4L80E or 4L85E automatic transmission shows signs of slippage, glazing, or heat damage, replacing it with a correctly specified module is what stops the...

A part that is close but not correct fits on the bench and fails in the vehicle.4L80E servo assy rear without cover used Hard Part. This replacement part is cataloged...

The cost of a wrong part is never the part; it is the second teardown.4L80E overdrive planet with overdrive drum set. This is the correct piece for the unit code...

When the upper clutch drum on a 4L80E or 4L85E is cracked, worn at the clutch piston bore, or otherwise damaged, replacing the drum directly is often the most efficient...

The piston is what converts line pressure into clamping force, so a leaking one makes every other repair pointless.4L80E drum used direct clutch (works with alum or bonded piston). These...

When the screen inside a 4L80E or 4L85E is worn, clogged, or missing its raised projections, internal flow is compromised and the valve body can pay the price. This is...

When a rebuild calls for a single friction module and nothing else, this listing delivers exactly that: one clutch pack module sized for the 4L80E and 4L85E automatic transmission, covering...

A slipping pack burns fluid and fouls the whole unit, so the frictions are rarely the only casualty once the symptom appears.4L80E Friction Clutch Pack 1964- direct fwd gen2 .080....

Once friction material glazes over, no amount of line pressure brings the holding capacity back.4L80E MODULE. This friction pack returns the clutch to the holding capacity the unit was designed...

Old sealing material gets brittle in storage as well as in service, which is why age matters as much as mileage.4L80E pump cover to case gasket. The rubber is rated...

Using the wrong component in an automatic transmission rebuild costs the job twice: once for the part and again for the teardown.4L80E GEARS. It meets the dimensions the assembly was...

Heat changes solenoid resistance, so a unit that shifts cold and misbehaves hot points straight at the electrical side.4L80E internal (male) w temp sensor 03 wire harness. This component restores...

Dirty fluid takes out solenoids first because the internal tolerances are the tightest in the unit.4L80E Internal (Male) WTemp Sensor 03Wire Harness. This replacement returns the circuit to the response...

A separator plate with a worn orifice changes the apply rate of every shift it controls.4L80E kit de conversio de pump de tipo viejo a moderno 1997. This returns shift...

Shift timing lives in the valve body, and worn bores put that timing out of range.4L80E line pressure booster kit. The unit is built to the calibration the controller expects.Pressure...

The parts that wear in an automatic transmission wear together, so replacing them together is what makes the repair last.4L80E (551580A650A). This kit brings together the parts a rebuild replaces...

Shift timing lives in the valve body, and worn bores put that timing out of range.4L80E reprogramming kit blue box 2009. This returns the hydraulic side of the unit to...

A seal that has hardened on the lip leaks under pressure and looks serviceable on the bench.4L80E Federal Mogul (86550328675731) Seal Rear 2.887OD (2.100ID) with Brake Assembly. This returns the...

A seal that has hardened on the lip leaks under pressure and looks serviceable on the bench.4L80E front metal clad seal. This seal restores containment at the shaft it rides...

Fluid on the case is the visible half of the problem; the other half is the pressure that never reached the clutch.4L80E bottom pan duraprene (except) pan gasket. This set...

A cracked or hardened piston seal bleeds off apply pressure and the clutch it feeds slips under load.4L80E (3 PCS ). The set covers the apply positions a rebuild opens.Return...

Apply pressure that reads correct at the port can still be lost at the piston.4L80E piston kit blue performance. Each piston is produced to the bore and travel of the...

When the controller commands a shift and nothing happens, the circuit is usually the culprit, not the clutch.4L80E speed sensor input output. The unit meets the electrical specification the controller...

A unit that revs and does not move in one gear is describing a sprag.4L80E planet overdrive (early sprag w .309 od rollers) for 2nd des input shaft 1993. This...

Pressure that reads correct at the test port can still be lost inside the body.4L80E (improved) shift kit. The assembly restores the circuits that route pressure to each pack.Debris holds...

Dirty fluid takes out solenoids first because the internal tolerances are the tightest in the unit.4L80E solenoid 1-2 2-3Gfx. The part is produced to the control specification of the circuit...

A shift that arrives late is an electrical symptom until the circuit is ruled out.4L80E lock-up tcc pwm solenoid. This replacement returns the circuit to the response time the shift...

A solenoid that sticks intermittently throws a code the customer never reproduces for the shop.4L80E solenoid shift 2-3 b 1991. This electrical component restores the control function the valve body...

A unit that revs and does not move in one gear is describing a sprag.4L80E sprag low clutch (rear) (roller type 8-legs to planet) l1995-up. The cage and elements are...

Sprag cages crack before the elements do, and the crack is invisible until it separates.4L80E sprag overdrive (3.25 od w .309 rollers) 01. This returns the position to its designed...

When a 4L80E or 4L85E clutch pack has been running hot, swapping in a kolene-treated steel module instead of a plain replacement can make the difference between a repair that...

Electrical failures in the valve body mimic mechanical wear, which is how good clutches get replaced for nothing.4L80E switch manifold pressure switch. This electrical component restores the control function the...

Lockup shudder is a friction surface problem, and it does not improve on its own.4L80E Single Disk lockup converter with a 2800rpm stall. Will work on all. This unit returns...

Shift timing lives in the valve body, and worn bores put that timing out of range.4L80E Valve Body Kit ligas y ajuste de tambor 2009. This restores the apply rates...

Pressure that reads correct at the test port can still be lost inside the body.4L80E boost valve sleeve reverse (OE type). This returns the hydraulic side of the unit to...

Shaft wobble from a worn bushing shows up as a pressure leak long before it shows up as a noise.4L80E washer kit. This bushing set returns the rotating parts to...

A teardown that finds one worn component has almost always found the first of several.4L80E repair kit test harness external harness (20 pin) (ROSTR.A). The contents are matched to each...

Friction material separates from its core long before the disc looks worn, and the failure arrives with no warning.4L80E MODULE. The facing is applied to the core to the specification...

4L80E Banner Rebuild Kit Performance Heavy Duty for 4L80E and 4L85E automatic transmissions, 1997 and later. Built around Stage 1 Red Clutches. Includes Stage 1 performance frictions and gasket and...

When the center support bushing in a 4L80E or 4L85E wears beyond tolerance, shaft movement increases and the damage spreads quickly to adjacent components, so getting the right replacement piece...

A failed center support bushing in a 4L80E or 4L85E automatic transmission can allow shaft movement that leads to accelerated wear across multiple internal components, so getting the exact replacement...

When the pump bushing wears down in a 4L80E or 4L85E automatic transmission, the drive shaft loses its radial support at the pump housing, and everything downstream feels it: pressure...

When the sun gear shaft bushing is worn, the shaft loses its support and begins to move in ways it should not, creating noise, erratic shift feel, and accelerated damage...

When the pan comes off a 4L80E or 4L85E and you need a replacement Automatic Transmission Filter for the deep pan configuration, the geometry of the pickup neck matters as...

External leaks and lost line pressure both trace back to gaskets and seals that hardened with age and heat.4L80E case to spacer plate 96 (will work units) gasket gasket. This...