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Case Saver Retainer 34762-20

  • 4L80-E
  • 4L85-E
  • Fits '99-later.

Sonnax case saver retainer 34762-20 for '99-later GM 4L80-E and 4L85-E transmissions is the only intermediate clutch retaining ring case saver that allows the inte...Read More

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4L80-E, 4L85-E Case Saver Retainer 34762-20

Extreme Duty Input Shaft 34670-02

  • 4L80-E
  • 4L85-E

Input shaft failure is a common problem in performance GM 4L80-E and 4L85-E transmissions running with extreme horsepower. OE and aftermarket shafts simply don’t h...Read More

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4L80-E, 4L85-E Extreme Duty Input Shaft 34670-02

Line Pressure Booster Kit 4L80E-LB1

  • 4L80-E
  • 4L85-E

Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressi...Read More

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4L80-E, 4L85-E Line Pressure Booster Kit 4L80E-LB1

Heavy Duty Intermediate Clutch Outer Sprag Race 34663HD-02

  • 4L80-E
  • 4L85-E
  • TH400

Improve GM 4L80-E, 4L85-E and TH400 transmission durability with Sonnax heavy duty intermediate clutch outer sprag race 34663HD-02. It’s an ideal upgrade for perfo...Read More

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4L80-E, 4L85-E, TH400 Heavy Duty Intermediate Clutch Outer Sprag Race 34663HD-02

Front Cover GM-CC-11

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

Sonnax offers the GM 4L80-E thicker cross section, 6-stud lockup front cover GM-CC-11. The strength of this cover is improved by using a one-piece forging with inc...Read More

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4L80-E (Dual Stator), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator) Front Cover GM-CC-11

4L80-E, 4L85-E
Remanufactured Valve Body GM028

’97–’03

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4L80-E, 4L85-E Remanufactured Valve Body GM028

4L80-E, 4L85-E
Remanufactured Valve Body GM029

’04-Later

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4L80-E, 4L85-E Remanufactured Valve Body GM029

Rubber Clutch Separator ORCS-103-380

  • 4L80-E
  • TH400
  • For use with frictions about .080" thick.

Rubber separators can be used in GM TH400 and 4L80-E racing transmission to help keep clutch steels separated and reduce open clutch drag when the clutch is diseng...Read More

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4L80-E, TH400 Rubber Clutch Separator ORCS-103-380

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

Thrust Washer GM-WF-125

  • 10-3/4" NLU
  • Buick TH350
  • TH400 (3L80), AT-540

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10-3/4" NLU, Buick TH350, TH400 (3L80), AT-540 Thrust Washer GM-WF-125

Heavy Duty Intermediate Clutch Backing Plate 34144HD-01

  • 4L80-E
  • TH400
  • .375" Thick

GM ’98-earlier 4L80-E transmissions can suffer intermediate backing plate breakage, clutch failure and case lug blow out when pressures are increased for more clut...Read More

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4L80-E, TH400 Heavy Duty Intermediate Clutch Backing Plate 34144HD-01

Heavy Duty Intermediate Clutch Backing Plate 34144HD-02

  • 4L80-E
  • 4L85-E
  • .275" Thick

GM '99-later 4L80-E and 4L85-E transmissions can suffer intermediate backing plate breakage, clutch failure and case lug blow out when pressures are increased for ...Read More

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4L80-E, 4L85-E Heavy Duty Intermediate Clutch Backing Plate 34144HD-02

Extreme Duty Forward Clutch Hub Kit 34322-02K

  • 4L80-E
  • 4L85-E
  • TH400
  • TH425

Sonnax extreme duty forward clutch hub kit 34322-02K is manufactured from forged 4140 steel and features nitrited and case-hardened splines to eliminate spline wea...Read More

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4L80-E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch Hub Kit 34322-02K

#7 Low/Reverse Checkball Seat 34200-52

  • 4L80-E
  • 4L85-E
  • Fits '95-later units.

Vehicles with GM 4L80-E and 4L85-E transmissions commonly exhibit wear in the #7 Low/Reverse checkball seat location. This issue is caused by normal movement of th...Read More

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4L80-E, 4L85-E #7 Low/Reverse Checkball Seat 34200-52

Shift Lever Kit 38512-03K

  • 4L80-E
  • 4L85-E
  • Short version with late-style design for use with aftermarket shifters.

Ideal for GM 4L80-E and 4L85-E custom transmission builds and performance applications, Sonnax shift lever kit 38512-03K makes it easy to install a short-length ma...Read More

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4L80-E, 4L85-E Shift Lever Kit 38512-03K

Turbine Hub GM-HT-34HS

  • 4L80-E (Late Single Stator)

Hardened internal spline

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4L80-E (Late Single Stator) Turbine Hub GM-HT-34HS

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

4L80-E, 4L85-E
Remanufactured Valve Body GM027

’92–’96, Temperature Sensor in Wire Harness

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4L80-E, 4L85-E Remanufactured Valve Body GM027

Forward Clutch Hub Front Washer 34298-078

  • 4L80-E
  • 4L85-E
  • TH400
  • TH425

Sonnax forward clutch hub front washer 34298-078 replaces the OE .063" thick washer in GM TH400, TH425, 4L80-E and 4L85-E transmissions between the forward clutch ...Read More

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4L80-E, 4L85-E, TH400, TH425 Forward Clutch Hub Front Washer 34298-078

Vacuum Test Plate Kit 34994-VTP

  • 4L80-E
  • 4L85-E

A worn valve or valve body bore can result in incorrect pressures in the transmission, which may lead to poor performance or failure of the transmission. With the ...Read More

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4L80-E, 4L85-E Vacuum Test Plate Kit 34994-VTP

Impeller Hub GM-90CM-48MR

  • 4L80-E, 4L85-E, Multi-Plate Performance Converter

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4L80-E, 4L85-E, Multi-Plate Performance Converter Impeller Hub GM-90CM-48MR

Hub Cover MI-HC-B

  • 245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only)
  • 245mm LU Euro (5L40-E)
  • 258mm (Captive Clutch)
  • 258mm LU (4L60-E, 5L40-E)
  • 280mm LU (4L60-E) “VJCX”
  • 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)
  • 300mm (4L60-E)
  • 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter
  • 4L60 (700-R4), 4L60-E, 200-4R (298mm) Single Plate Performance Converter (Mounting Ring)
  • 4L60-E (298mm), Single-Plate Performance Converter
  • 4L60-E (300mm), Single-Plate Performance Converter
  • 4L60-E (300mm), Single-Plate Performance Converter (Mounting Ring)
  • 6L80 (245mm), Single-Plate Performance Converter
  • 6L80, 6L90 (258mm), Multi-Plate Performance Converter
  • 6L80, 6L90 (265mm), Multi-Plate Performance Converter
  • 6L80, 6L90 (300mm)
  • 6L90 (Captive Clutch)
  • 6R80, 260mm (Late)
  • 6R80, 280mm (Early)
  • 6R80, 280mm (Late)
  • A465, AS68RC
  • A6LF3
  • A750E
  • A860E
  • AB60E/F
  • JR403E, RG4R01A
  • RE4F04A/V (DA-37,DA-39;DA39)
  • RE4R01A
  • RE4R03A, 250mm
  • RE4R03A, 280mm (DA-30;DA30)
  • RE5R05A
  • RE7R01A (JR710E)
  • RL4F02A (DA-11;DA11)
  • RL4F02A (DA-13;DA13)
  • RL4F02A (DA-42)
  • TF-60SN (VW 09G)
  • TR-60SN (VW 09D), Non-Captive Clutch
  • TR-80SD (0C8)
  • ZF4HP18
  • ZF5HP19 (Captive Clutch)
  • ZF5HP19 (Single Friction)
  • ZF6HP19, 245mm
  • ZF6HP19, 245mm (LuK)
  • ZF6HP21, 245mm (LuK)
  • ZF6HP26, 255mm
  • ZF6HP26, 260mm
  • ZF9HP48 (948TE)

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245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only), 245mm LU Euro (5L40-E), 258mm (Captive Clutch), 258mm LU (4L60-E, 5L40-E), 280mm LU (4L60-E) “VJCX”, 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E), 300mm (4L60-E), 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter, 4L60 (700-R4), 4L60-E, 200-4R (298mm) Single Plate Performance Converter (Mounting Ring), 4L60-E (298mm), Single-Plate Performance Converter, 4L60-E (300mm), Single-Plate Performance Converter, 4L60-E (300mm), Single-Plate Performance Converter (Mounting Ring), 6L80 (245mm), Single-Plate Performance Converter, 6L80, 6L90 (258mm), Multi-Plate Performance Converter , 6L80, 6L90 (265mm), Multi-Plate Performance Converter, 6L80, 6L90 (300mm), 6L90 (Captive Clutch), 6R80, 260mm (Late), 6R80, 280mm (Early), 6R80, 280mm (Late), A465, AS68RC, A6LF3, A750E, A860E, AB60E/F, JR403E, RG4R01A, RE4F04A/V (DA-37,DA-39;DA39), RE4R01A, RE4R03A, 250mm, RE4R03A, 280mm (DA-30;DA30), RE5R05A, RE7R01A (JR710E), RL4F02A (DA-11;DA11), RL4F02A (DA-13;DA13), RL4F02A (DA-42), TF-60SN (VW 09G), TR-60SN (VW 09D), Non-Captive Clutch, TR-80SD (0C8), ZF4HP18, ZF5HP19 (Captive Clutch), ZF5HP19 (Single Friction), ZF6HP19, 245mm, ZF6HP19, 245mm (LuK), ZF6HP21, 245mm (LuK), ZF6HP26, 255mm, ZF6HP26, 260mm, ZF9HP48 (948TE) Hub Cover MI-HC-B

Vacuum Test Plate Kit Seal 34994-VTP-S

  • 4L80-E
  • 4L85-E

Sonnax vacuum test plate kit seal 34994-VTP-S is a replacement silicone seal for a worn or damaged original seal in vacuum test plate kit 34994-VTP.

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4L80-E, 4L85-E Vacuum Test Plate Kit Seal 34994-VTP-S

Roller Bearing Slip Yoke T3-3-2431CBH

For roller bearing tail housing; TH400, 4L80-E; Powerglide with 32-tooth spline; G-Force GSR manual transmission

Slip yokes found in many common applications run on a bushing inside the transmission tail housing. High-horsepower builds often use a roller bearing instead, so u...Read More

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Roller Bearing Slip Yoke T3-3-2431CBH

Roll GM-RO-1

  • 258mm LU (4L60-E, 5L40-E)
  • 258mm LU (4T65-E)
  • 265mm LU (4T60-E, 4T80-E)
  • 4L80-E (Dual Stator)

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258mm LU (4L60-E, 5L40-E), 258mm LU (4T65-E), 265mm LU (4T60-E, 4T80-E), 4L80-E (Dual Stator) Roll GM-RO-1

Rubber Clutch Separator ORCS-070-380

  • TH400
  • For use with frictions about .060" thick.

Rubber separators can be used in GM TH400 racing transmissions to help keep clutch steels separated and reduce open clutch drag when the clutch is disengaged. Fric...Read More

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TH400 Rubber Clutch Separator ORCS-070-380

Thrust Bearing GM-N-11

  • 245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only)
  • 245mm LU Euro (5L40-E)
  • 258mm (Captive Clutch)
  • 258mm LU (4L60-E, 5L40-E)
  • 258mm LU (4T65-E)
  • 265mm LU (4T60-E, 4T80-E)
  • 4EAT-F (Escort '96-Later)
  • 4L60 (700-R4), 4L60-E (298mm), Multi-Plate Performance Converter
  • 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter
  • 4L60 (700-R4), 4L60-E, 200-4R (298mm) Single Plate Performance Converter (Mounting Ring)
  • 4L60-E (300mm), Single-Plate Performance Converter (Mounting Ring)
  • 4L60-E, 4L65-E, 4L75-E (300mm), Multi-Plate Performance Converter
  • 4L80-E, 4L85-E, Multi-Plate Performance Converter
  • 4L80-E, 4L85-E, Single-Plate Performance Converter (Mounting Ring)
  • 6F35
  • 6L45/6L50
  • 6L80 (258mm)
  • 6L80 (265mm), Multi-Plate Performance Converter
  • 6L80, 6L90 (258mm), Multi-Plate Performance Converter
  • 6R60, 6R75W
  • 6R80, 260mm (Late)
  • 6R80, 280mm (Early)
  • 6R80, 280mm (Late)
  • 727, 10-3/4" NLU Performance Converter
  • 8L45
  • 8L90
  • 904, 10-3/4" NLU Performance Converter
  • AOD Performance Converter
  • AODE, 4R70W Performance Converter
  • C4, 10" or 11" Performance Converter
  • C4, 11" Performance Converter
  • C6 Performance Converter
  • Powerglide, TH350, TH400, 10" Performance Converter
  • Powerglide, TH350, TH400, 10" Performance Converter (Mounting Ring)
  • Saturn TAAT

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245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only), 245mm LU Euro (5L40-E), 258mm (Captive Clutch), 258mm LU (4L60-E, 5L40-E), 258mm LU (4T65-E), 265mm LU (4T60-E, 4T80-E), 4EAT-F (Escort '96-Later), 4L60 (700-R4), 4L60-E (298mm), Multi-Plate Performance Converter, 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter, 4L60 (700-R4), 4L60-E, 200-4R (298mm) Single Plate Performance Converter (Mounting Ring), 4L60-E (300mm), Single-Plate Performance Converter (Mounting Ring), 4L60-E, 4L65-E, 4L75-E (300mm), Multi-Plate Performance Converter, 4L80-E, 4L85-E, Multi-Plate Performance Converter , 4L80-E, 4L85-E, Single-Plate Performance Converter (Mounting Ring), 6F35, 6L45/6L50, 6L80 (258mm), 6L80 (265mm), Multi-Plate Performance Converter, 6L80, 6L90 (258mm), Multi-Plate Performance Converter , 6R60, 6R75W, 6R80, 260mm (Late), 6R80, 280mm (Early), 6R80, 280mm (Late), 727, 10-3/4" NLU Performance Converter, 8L45, 8L90, 904, 10-3/4" NLU Performance Converter, AOD Performance Converter, AODE, 4R70W Performance Converter, C4, 10" or 11" Performance Converter, C4, 11" Performance Converter, C6 Performance Converter, Powerglide, TH350, TH400, 10" Performance Converter, Powerglide, TH350, TH400, 10" Performance Converter (Mounting Ring), Saturn TAAT Thrust Bearing GM-N-11

Roll GM-RO-572

  • 300mm (4L60-E)
  • 68RFE
  • 68RFE Multi-Plate Performance Converter
  • 6L80, 6L90 (300mm)
  • 6L90 (Captive Clutch)
  • 6R80, 260mm (Late)
  • 6R80, 280mm (Early)
  • 6R80, 280mm (Late)
  • A618, 47RH/RE, 48RE (310mm) Multi-Plate Performance Converter
  • BorgWarner 310mm LU (A618, 47RH/RE, 48RE)
  • BorgWarner 310mm NLU
  • Buick TH350
  • CD4E, 9-1/4" & 10-1/4"
  • CD4E, 9-1/4" (3.0L & 2.3L)
  • Miscellaneous Components
  • TH400 (3L80), AT-540

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300mm (4L60-E), 68RFE, 68RFE Multi-Plate Performance Converter, 6L80, 6L90 (300mm), 6L90 (Captive Clutch), 6R80, 260mm (Late), 6R80, 280mm (Early), 6R80, 280mm (Late), A618, 47RH/RE, 48RE (310mm) Multi-Plate Performance Converter, BorgWarner 310mm LU (A618, 47RH/RE, 48RE), BorgWarner 310mm NLU, Buick TH350, CD4E, 9-1/4" & 10-1/4", CD4E, 9-1/4" (3.0L & 2.3L), Miscellaneous Components, TH400 (3L80), AT-540 Roll GM-RO-572

Stator GM-ST-086

  • 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter
  • 4L60-E (298mm), Single-Plate Performance Converter
  • 4L60-E (300mm), Single-Plate Performance Converter
  • 6L80 (300mm), Single-Plate Performance Converter
  • 727, 10-3/4" NLU Performance Converter
  • 904, 10-3/4" NLU Performance Converter
  • AOD Performance Converter
  • C4, 10" or 11" Performance Converter
  • C4, 11" Performance Converter
  • C6 Performance Converter
  • Powerglide, TH350, TH400, 10" Performance Converter
  • Powerglide, TH350, TH400, 10" Performance Converter (Mounting Ring)
  • “086” GM 245mm blade profile

The versatile GM 245mm core allows builders to assemble a high performance converter with a variety of stall speeds and torque multiplication rates. The weakest pa...Read More

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4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter, 4L60-E (298mm), Single-Plate Performance Converter, 4L60-E (300mm), Single-Plate Performance Converter, 6L80 (300mm), Single-Plate Performance Converter, 727, 10-3/4" NLU Performance Converter, 904, 10-3/4" NLU Performance Converter, AOD Performance Converter, C4, 10" or 11" Performance Converter, C4, 11" Performance Converter, C6 Performance Converter, Powerglide, TH350, TH400, 10" Performance Converter, Powerglide, TH350, TH400, 10" Performance Converter (Mounting Ring) Stator GM-ST-086

Stator GM-ST-082

  • 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter
  • 4L60-E (298mm), Single-Plate Performance Converter
  • 4L60-E (300mm), Single-Plate Performance Converter
  • 6L80 (300mm), Single-Plate Performance Converter
  • 727, 10-3/4" NLU Performance Converter
  • 904, 10-3/4" NLU Performance Converter
  • AOD Performance Converter
  • C4, 10" or 11" Performance Converter
  • C4, 11" Performance Converter
  • C6 Performance Converter
  • Powerglide, TH350, TH400, 10" Performance Converter
  • Powerglide, TH350, TH400, 10" Performance Converter (Mounting Ring)
  • “082” GM 245mm blade profile

The versatile GM 245mm core allows builders to assemble a high performance converter with a variety of stall speeds and torque multiplication rates. The weakest pa...Read More

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4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter, 4L60-E (298mm), Single-Plate Performance Converter, 4L60-E (300mm), Single-Plate Performance Converter, 6L80 (300mm), Single-Plate Performance Converter, 727, 10-3/4" NLU Performance Converter, 904, 10-3/4" NLU Performance Converter, AOD Performance Converter, C4, 10" or 11" Performance Converter, C4, 11" Performance Converter, C6 Performance Converter, Powerglide, TH350, TH400, 10" Performance Converter, Powerglide, TH350, TH400, 10" Performance Converter (Mounting Ring) Stator GM-ST-082
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