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Extreme Duty Main Shaft 34672-05

  • 4L80-E
  • 4L85-E
  • TH400

Main shaft failure is a common problem in extreme duty GM TH400, 4L80-E and 4L85-E units. OE and aftermarket shafts simply don’t hold up in extreme horsepower appl...Read More

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4L80-E, 4L85-E, TH400 Extreme Duty Main Shaft 34672-05

Accordion Spring GM-S-11A

  • 300mm (4L60-E)
  • 6L90 (Captive Clutch)
  • AT-500
  • MT-600
  • TH400 (3L80), AT-540

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300mm (4L60-E), 6L90 (Captive Clutch), AT-500, MT-600, TH400 (3L80), AT-540 Accordion Spring GM-S-11A

O-Ring GM-O-10V

  • 4L80-E (Dual Stator)
  • 4L80-E (Early Single Stator)
  • 4L80-E (Late Single Stator)

GM-O-10V is an oversized version of GM-O-2V. It can be used in GM 4L80-E torque converters with worn piston bores.

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4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator) O-Ring GM-O-10V

Heavy Duty Low/Reverse Servo Piston 34914-02

  • 4L80-E
  • Fits '96-later

OE cast aluminum servo pistons can be brittle and are prone to breaking. Sonnax heavy duty low/reverse servo piston 34914-02 for GM '96-later 4L80-E transmissions ...Read More

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4L80-E Heavy Duty Low/Reverse Servo Piston 34914-02

Tool Kit F-34994-TL18

  • 4L80-E
  • 4L85-E

Tool Kit for 34994-18K

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4L80-E, 4L85-E Tool Kit F-34994-TL18

Tool Kit F-34994-TL22

  • 4L80-E
  • 4L85-E

Tool Kit for 34994-22K.

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4L80-E, 4L85-E Tool Kit F-34994-TL22

Installation Tool 34838-TL

  • 4L80-E
  • 4L85-E
  • TH400
This part has been discontinued. Click here to see the part instructions.

Sizing Tool 34716-TL

  • 4L80-E
  • 4L85-E
This part has been discontinued. Click here to see the part instructions.

Tool Kit F-34200-TL36

  • 4L80-E
  • 4L85-E
This part has been discontinued. Click here to see the part instructions.

Pinion Roller 34821-06

  • 4L80-E
This part has been discontinued.

Forward & Direct Clutch Inner Snap Ring 34577-01

  • 4L80-E
  • AT-540
  • TH400
  • Fits AT-540/543/545.

Sonnax forward and direct clutch inner snap ring 34577-01 is a direct replacement for GM 4L80-E, TH400 and Allison® AT-540 forward and direct piston return spring snap rings.

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4L80-E, AT-540, TH400 Forward & Direct Clutch Inner Snap Ring 34577-01

Actuator Feed Limit Valve Kit 77754-09K

  • 4L60-E
  • 4L65-E
  • 4L70-E

In GM 4L60-E, 4L65-E and 4L70-E units, the AFL valve is a solenoid feed regulator valve that feeds the EPC solenoid and shift solenoids. The OE AFL valve design ha...Read More

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4L60-E, 4L65-E, 4L70-E Actuator Feed Limit Valve Kit 77754-09K

Tabbed Pinion Washers 34821-08

  • 4L80-E
  • 4L85-E
This part has been discontinued.

Retaining Clip 34989-01

  • 4L80-E
  • 4L85-E
  • Rear Servo Piston. Fits '91–'95 only.
This part has been discontinued.

Snap Ring 34994-15

  • 4L80-E
  • 4L85-E
This part has been discontinued.

Bolt 77801-01

  • 4L80-E
  • 4L85-E
This part has been discontinued.

Heavy Duty Clutch Retaining Ring 28124

  • 4L80-E
  • 4L85-E
  • Powerglide
  • TH400
  • Intermediate clutch backing plate

Sonnax heavy duty clutch retaining ring 28124 can be used as an upgrade for the Reverse clutch backing plate retaining ring in GM Powerglide transmissions and for ...Read More

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4L80-E, 4L85-E, Powerglide, TH400 Heavy Duty Clutch Retaining Ring 28124

End Plug Kit 34994-11

  • 4L80-E
  • 4L85-E
  • Fits TCC valve bore with .500" dia.
This part has been discontinued.

Heavy Duty Main Shaft 34672-01

  • 4L80-E
  • 4L85-E
  • TH400

Main shaft failure is a common problem in performance and heavy duty GM TH400, 4L80-E and 4L85-E units. Sonnax heavy duty main shaft 34672-01 is manufactured from ...Read More

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4L80-E, 4L85-E, TH400 Heavy Duty Main Shaft 34672-01

Planetary Rebuild Kit 34875RK

  • 4L80-E
  • TH400
  • For output and reaction planetaries, fits all TH400 and '98-earlier 4L80-E with .750" wide pinion gears.

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4L80-E, TH400 Planetary Rebuild Kit 34875RK

Impeller Hub GM-90-62G

  • 4L80-E (Late Single Stator)
This part has been discontinued.

Pinion Thrust Washer 34875-04

  • 4L80-E
  • 4T65-E
  • TH400
  • For output and reaction planetaries, fits all TH400, 4T65-E and '98-earlier 4L80-E with .750" wide pinion gears.

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4L80-E, 4T65-E, TH400 Pinion Thrust Washer 34875-04

Thrust Bearing 65405

  • 200-4R
  • 4L80-E
  • 4L85-E
  • TH200
  • 4L80-E/4L85-E: Fits OD planet/fwd drum; 200: Fits front internal gear-to-carrier

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200-4R, 4L80-E, 4L85-E, TH200 Thrust Bearing 65405

Mechanical Diode® GM-MD-4-2

Sonnax mechanical diode GM-MD-4-2 for GM 4L80-E, 4L85-E converters offers much greater strength than existing roller clutches and “dog bone” style sprags. This dio...Read More

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4L80-E, 4L85-E, Single-Plate Performance Converter (Mounting Ring) Mechanical Diode® GM-MD-4-2

Pinion Roller 34875-05

  • 4L80-E
  • Overdrive planetary, .855" long rollers fit '98-earlier only.

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4L80-E Pinion Roller 34875-05

Slip Yoke T3R-3-9762HP

TH400, 4L80-E, Muncie M20, M21 & M22

This part has been discontinued.

O-Ring GM-O-2V

  • 4L80-E (Dual Stator)
  • 4L80-E (Early Single Stator)
  • 4L80-E (Late Single Stator)

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4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator) O-Ring GM-O-2V

Rivet GM-RV-8

  • 4L80-E (Dual Stator)
  • 4L80-E (Early Single Stator)
  • 4L80-E (Late Single Stator)

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4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator) Rivet GM-RV-8

Thrust Washer GM-WA-8

  • 4L80-E (Dual Stator)
  • 4L80-E (Early Single Stator)
  • 4L80-E (Late Single Stator)

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4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator) Thrust Washer GM-WA-8

Friction Ring B45240HTE

  • 4L80-E (Dual Stator)
  • 4L80-E (Early Single Stator)
  • 4L80-E (Late Single Stator)

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4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator) Friction Ring B45240HTE
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