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6L90 Performance Transmission Complete Clutch Module - Level 4

Includes all 5 Clutch Kits | FREE UPS Ground to the contiguous United States (lower 48) | Detailed Instructions Included

Kit is designed with 45 tooth 4-5-6 clutch plates. This clutch pack provides 45% more surface area than a stock clutch set up. CDT's Billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104690-45-P) is required in order to use this clutch pack. The clutch hub and intermediate shaft are not included in this kit. The 3-5-R clutch pack offers 40% more clutch area than stock.
Availability: In stock
In stock items ship within 1-2 business days.
Picture for representation purposes only. Actual contents may vary as we continue to develop our products.

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$1,175.00
SKU: CDTPCML4/90-P

CDT456L4/90-CM (4-5-6 CLUTCH MODULE)

8  G3® Clutches
10 Lindered Steels (varying thicknesses)
1  Stepped Apply Plate
1  Wide Backing Plate
1  Snap Ring
2  Hi-Per Blue® Bonded Pistons

CDT456L4/90-CM offers 45% more clutch apply area than stock. G3® friction material is formulated to achieve minimal wear and maximize heat resistance. Lindured is a chemical and heat treatment process that hardens the steel, which results in less wear. Hi-Per Blue® Pistons are manufactured with upgraded High Performance Blue AEM material for superior thermal and chemical resistance, with better fit and performance. CDT's Billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104690-45-P) is required in order to use this clutch pack.

CDT35RL4/90-CM (3-5-R CLUTCH MODULE)
7 Borg Warner® High Energy Clutches
7 Kolene® Steels (varying thicknesses)
1 Steel Plate
1 Apply Ring
1 Backing Plate
1 Snap Ring

CDT35RL4/90-CM offers 40% more clutch apply area than stock. High Energy material maintains consistent frictional behavior and tolerates extreme thermal stress applications. Kolene® Steels provide a surface treatment the enhances wear & fatigue resistance.

CDT26L4/90-CM (2-6 CLUTCH MODULE) 

7 Red Eagle® Externally Splined Clutches                                      
6 Red Eagle® Internally Splined Clutches   
1 Externally Splined Plate                                                 

Red Eagle® Clutches are designed to limit the amount of slip providing a shorter apply time, generating less heat. 

CDT1234L4/90-CM (1-2-3-4 CLUTCH MODULE)

6 High Energy® Clutches
6 Steels
1 Backing Plate
1 Snap Ring
1 Spiral Snap Ring
1 Snap Ring Kit

CDTLRL4/90-CM (LOW-REVERSE CLUTCH MODULE)
6 High Energy® Clutches
6 Steels

 

PLEASE NOTE: GM has a transmission that has the same outside dimensions as a 6L90 but uses one less clutch in all the clutch housings compared to a true 6L90. We call this transmission a 6L90LCC (less clutch capacity). Please refer to "Stock Clutch Capacity Chart" and "Length of Main Case Chart" on the "Transmission Specs" tab below to determine if you have a 6L90 or 6L90LCC. When ordering this part, please indicate in the Notes textbox above that you have a 6L90LCC. If you are unable to determine if you have a 6L90 or 6L90LCC, we will determine which transmission you have from the VIN.

transmission specs worksheet

  • Transmission holding fixture
  • Calipers
  • Dial Indicator Set
  • Bushing Drivers & Arbor Press for Bushing Installation (Bushings should only be replaced as needed)
  • Sealing Ring Protector and Sizer
  • Various Clutch Spring Compressors
  • Output Carrier/Shaft Lifting Tool
  • 1-2-3-4 & 3-5-R Clutch Housing Installer
  • Large Snap-Ring Pliers
  • Pump Alignment Tool

Upgraded Parts If you have an early pump cover (stator) that does not utilize anti-rotational tabs on the sealing rings or an early 1-2-3-4/3-5-R clutch housing that does not have the matrix stamp you will need to install a factory upgraded pump cover and clutch housing.

Transmission Tuning Please understand that proper tuning of the TCM and ECM are mandatory. All 6L80/90’s are torque base shifted units. The torque signal is calculated thru the ECM. Therefore, transmission performance & longevity are directly dependent on the delivered torque signal that’s calculated in the ECM. If this is not done properly, you will experience premature transmission failure. We also do not recommend maxing out pressures or deleting torque management completely because it will cause seal failure and/or hard part breakage.

Flushing Cooler & Lines We cannot stress enough the importance of flushing the transmission cooler(s) and lines, even if they are new. We recommend using a Hot Flush Machine Flush Machine or something comparable.                                      

Auxiliary Cooler You need to install a stacked plate auxiliary transmission cooler (not a tube & fin style cooler) rated for 25,000 GVW. The ideal operating temperature for this transmission is 180°or less. These transmissions have a tendency to run very hot – the cooler will lower operating temperature and recovery time which in turn will extend the life of your transmission.

Limited Warranty Statement

Circle D Transmission’s Rebuild Kits carry a 1 year, parts only warranty, exclusively against manufacturer’s defects. Warranty period begins at date of purchase. There is no warranty under the conditions listed below. This includes, but not limited to:

Improperly Stored
Improperly Installed
Improperly Tuned (EMC or TCM)
Misapplication
Altered, either by Owner or Their Technician
Torque Converter Failure
Inadequate Flushing of Transmission Cooler
Improper Fluid Level
Water/Engine Coolant in Transmission
Excessive Power
Accident
Neglect

Circle D Transmission will not pay for any fluids replaced in the event of a Kit failure.
Under no circumstances shall there be any labor warranty or other warranty coverage on Circle D Transmission Kits beyond the replacement of individual Kit components. We will not provide you with any cash refund except as many be required by law. Consequential and incidental damages are not recoverable under this warranty and are expressly excluded.

There is no warranty on broken parts such as, but not limited to: twisted splines, broken shafts or broken planetaries.

Warranty issues will be considered on an individual basis.