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SKU:SC-6L80E-CAT1-R
SunCoast 6L80E Category 1 Raybestos Rebuild Kit
SunCoast 6L80E Category 1 Raybestos Rebuild Kit

Description
6L80E Rebuild kit includes the following
- New Selective Pump Thrust Washer
- New Filter Assembly
- Torrington Thrust Bearing Kit
- New Bushing Kit
- New Molded Piston Kit
- All New Steel Module
- Raybestos GPZ Friction Module
- Raybestos 3-5-R Z Pak
- Raybestos 4-5-6 Z Pak
- SunCoast Overhaul Kit
- New Pan Gasket
- Sonnax Zip Kit
- Heavy Duty 4-5-6 Backing Plate Setup
The 6L Platform
The 6L80 transmission was manufactured in Ypsilanti, Michigan, at the Willow Run Transmission facility. The 6L80 was a much different transmission than its predecessor and was intended to be replaced in 2006 when it was initially released. This new unit came with a new 32-bit controller integrated into the valve body that stayed in constant communication with the ECM via GM's new high-speed can bus network.
This new design approach in the 6L80 utilizes three-way, variable-bleed solenoids to improve shift quality and consistency which are constantly monitored and corrected by utilizing GM's new adaptive shift strategies. The deep first and second gear ratios of 4.02 and 2.36 offer ample torque multiplication with a nice, tight shift recovery. The 6L80 transmission comes with a factory rating of 440 ft. lbs of torque.
The Cat 1 6L80 Rebuild
The Category 1 Suncoast 6L80 rebuild kit has everything that our Category 0 kit has with the addition of the Sonnax Zip Kit and the upgraded 4-5-6 piston and backing plate assembly.
The Frictions Kit
Raybestos® Powertrain GM 6L80 GPZ Clutch Pack® contains upgraded friction components manufactured with the unique blend of GPZ high energy fibers for ultimate stress and high-temperature durability. This kit also includes the 3-5 Reverse Z Pak® and 4-5-6 Z Pak® to provide solutions to common 6L80 transmission failure points. Z Paks are completely redesigned, single-sided clutch systems that outperform OE in torque and heat capacity, without coning.
Friction Material Composition
Raybestos Powertrain GPZ friction plates greatly increase transmission performance and durability. This state-of-the-art friction material far exceeds OE material to withstand high stress, high temperatures, and repeated cycling. GPZ's outstanding performance benefits are perfect for heavy-duty vehicles and high-stress driving. Testing of GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases.
Recommended Use
High-stress, driving-enhanced performance applications, heavy-duty vehicles, commercial vehicles, daily-driven vehicles and as a problem solution for 3-5 Reverse and 4-5-6 clutch failure.
The Zip Kit
Sonnax Zip Kit 6L45-6L90-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the GM 6L45, 6L50, 6L80, 6L90 valve body. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, clutch apply control, solenoid feed and lockup control circuits. The kit also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing. No special tools are required for installing these parts.
The Zip Kit quick guide provides clear and easy instructions on one sheet to get the unit sealed up and back on the road fast. In addition to general rebuilding tips and technical information, the technical booklet included in this kit contains vacuum testing information and locations at other key areas of the valve body.
- No reaming required
- Installs quickly with no special tools required
- Uniquely designed parts address root causes of valve body complaints by sealing critical pressure circuits
- Detailed technical booklet included with in-depth rebuild and inspection tips for comprehensive valve body repair
Contents
- Pressure Regulator Valve Kit
- Boost Valve Kit
- Clutch Select Valve Spring Kit
- Compensater Feed Regulator Valve Kit
- TCC Regulator Valve, Spring, Shuttle Valve and End Plug
- O-Ringed End Plug Kit
- Actuator Feed Limit Valve, Sleeve and Spring
- Center Support Seal Kit
- Vacuum Test Nut
- Checkballs (8) .250" dia.
The Backbone of the 4-5-6 Clutch
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures exceed OE specifications. The other problem is flexing and bowing of the backing plate (coning), which is a primary source of clutch failure.
The heavy duty Sonnax 4-5-6 clutch apply piston kit 104960-01K addresses these weak areas in two ways:
- A modified OE clutch apply piston and piston dam are used in conjunction with a specially-designed Sonnax piston apply ring.
- A more rigid backing plate
The Sonnax apply ring increases surface area between the apply piston and OE waved clutch plate, resulting in more even distribution of apply force to clutch plates. The Sonnax backing plate minimizes the flexing/bowing when clutch is applied, drastically reducing the likelihood of clutch plate distortion.
- Use with stock clutches and OE waved plate
- Solid backing plate design outperforms OE and aftermarket plates
- Increased apply ring surface area improves clutch apply
- Reduces heat buildup
Contents
- Apply Piston
- Apply Ring
- Piston Dam
- Backing Plate
Fitments
2017 Chevrolet Camaro
2017 Chevrolet Corvette
2017 Chevrolet Silverado
2017 Chevrolet Silverado 1500
2017 Chevrolet Silverado 1500 Classic
2017 Chevrolet Silverado 1500 HD
2017 Chevrolet Silverado 1500 HD Classic
2017 Chevrolet Suburban
2017 Chevrolet Suburban 1500
2017 Chevrolet Tahoe
2017 GMC Sierra
2017 GMC Sierra 1500
2017 GMC Sierra 1500 Classic
2017 GMC Sierra 1500 HD
2017 GMC Sierra 1500 HD Classic
2017 GMC Yukon
2017 GMC Yukon XL 1500
2017 Pontiac GTO
2016 Chevrolet Camaro
2016 Chevrolet Corvette
2016 Chevrolet Silverado
2016 Chevrolet Silverado 1500
2016 Chevrolet Silverado 1500 Classic
2016 Chevrolet Silverado 1500 HD
2016 Chevrolet Silverado 1500 HD Classic
2016 Chevrolet Suburban
2016 Chevrolet Suburban 1500
2016 Chevrolet Tahoe
2016 GMC Sierra
2016 GMC Sierra 1500
2016 GMC Sierra 1500 Classic
2016 GMC Sierra 1500 HD
2016 GMC Sierra 1500 HD Classic
2016 GMC Yukon
2016 GMC Yukon XL 1500
2016 Pontiac GTO
2015 Chevrolet Camaro
2015 Chevrolet Corvette
2015 Chevrolet Silverado
2015 Chevrolet Silverado 1500
2015 Chevrolet Silverado 1500 Classic
2015 Chevrolet Silverado 1500 HD
2015 Chevrolet Silverado 1500 HD Classic
2015 Chevrolet Suburban
2015 Chevrolet Suburban 1500
2015 Chevrolet Tahoe
2015 GMC Sierra
2015 GMC Sierra 1500
2015 GMC Sierra 1500 Classic
2015 GMC Sierra 1500 HD
2015 GMC Sierra 1500 HD Classic
2015 GMC Yukon
2015 GMC Yukon XL 1500
2015 Pontiac GTO
2014 Chevrolet Camaro
2014 Chevrolet Corvette
2014 Chevrolet Silverado
2014 Chevrolet Silverado 1500
2014 Chevrolet Silverado 1500 Classic
2014 Chevrolet Silverado 1500 HD
2014 Chevrolet Silverado 1500 HD Classic
2014 Chevrolet Suburban
2014 Chevrolet Suburban 1500
2014 Chevrolet Tahoe
2014 GMC Sierra
2014 GMC Sierra 1500
2014 GMC Sierra 1500 Classic
2014 GMC Sierra 1500 HD
2014 GMC Sierra 1500 HD Classic
2014 GMC Yukon
2014 GMC Yukon XL 1500
2014 Pontiac GTO
2013 Chevrolet Camaro
2013 Chevrolet Corvette
2013 Chevrolet Silverado
2013 Chevrolet Silverado 1500
2013 Chevrolet Silverado 1500 Classic
2013 Chevrolet Silverado 1500 HD
2013 Chevrolet Silverado 1500 HD Classic
2013 Chevrolet Suburban
2013 Chevrolet Suburban 1500
2013 Chevrolet Tahoe
2013 GMC Sierra
2013 GMC Sierra 1500
2013 GMC Sierra 1500 Classic
2013 GMC Sierra 1500 HD
2013 GMC Sierra 1500 HD Classic
2013 GMC Yukon
2013 GMC Yukon XL 1500
2013 Pontiac GTO
2012 Chevrolet Camaro
2012 Chevrolet Corvette
2012 Chevrolet Silverado
2012 Chevrolet Silverado 1500
2012 Chevrolet Silverado 1500 Classic
2012 Chevrolet Silverado 1500 HD
2012 Chevrolet Silverado 1500 HD Classic
2012 Chevrolet Suburban
2012 Chevrolet Suburban 1500
2012 Chevrolet Tahoe
2012 GMC Sierra
2012 GMC Sierra 1500
2012 GMC Sierra 1500 Classic
2012 GMC Sierra 1500 HD
2012 GMC Sierra 1500 HD Classic
2012 GMC Yukon
2012 GMC Yukon XL 1500
2012 Pontiac GTO
2011 Chevrolet Camaro
2011 Chevrolet Corvette
2011 Chevrolet Silverado
2011 Chevrolet Silverado 1500
2011 Chevrolet Silverado 1500 Classic
2011 Chevrolet Silverado 1500 HD
2011 Chevrolet Silverado 1500 HD Classic
2011 Chevrolet Suburban
2011 Chevrolet Suburban 1500
2011 Chevrolet Tahoe
2011 GMC Sierra
2011 GMC Sierra 1500
2011 GMC Sierra 1500 Classic
2011 GMC Sierra 1500 HD
2011 GMC Sierra 1500 HD Classic
2011 GMC Yukon
2011 GMC Yukon XL 1500
2011 Pontiac GTO
2010 Chevrolet Camaro
2010 Chevrolet Corvette
2010 Chevrolet Silverado
2010 Chevrolet Silverado 1500
2010 Chevrolet Silverado 1500 Classic
2010 Chevrolet Silverado 1500 HD
2010 Chevrolet Silverado 1500 HD Classic
2010 Chevrolet Suburban
2010 Chevrolet Suburban 1500
2010 Chevrolet Tahoe
2010 GMC Sierra
2010 GMC Sierra 1500
2010 GMC Sierra 1500 Classic
2010 GMC Sierra 1500 HD
2010 GMC Sierra 1500 HD Classic
2010 GMC Yukon
2010 GMC Yukon XL 1500
2010 Pontiac GTO
2009 Chevrolet Corvette
2009 Chevrolet Silverado
2009 Chevrolet Silverado 1500
2009 Chevrolet Silverado 1500 Classic
2009 Chevrolet Silverado 1500 HD
2009 Chevrolet Silverado 1500 HD Classic
2009 Chevrolet Suburban
2009 Chevrolet Suburban 1500
2009 Chevrolet Tahoe
2009 GMC Sierra
2009 GMC Sierra 1500
2009 GMC Sierra 1500 Classic
2009 GMC Sierra 1500 HD
2009 GMC Sierra 1500 HD Classic
2009 GMC Yukon
2009 GMC Yukon XL 1500
2009 Pontiac GTO
2008 Chevrolet Corvette
2008 Chevrolet Silverado
2008 Chevrolet Silverado 1500
2008 Chevrolet Silverado 1500 Classic
2008 Chevrolet Silverado 1500 HD
2008 Chevrolet Silverado 1500 HD Classic
2008 Chevrolet Suburban
2008 Chevrolet Suburban 1500
2008 Chevrolet Tahoe
2008 GMC Sierra
2008 GMC Sierra 1500
2008 GMC Sierra 1500 Classic
2008 GMC Sierra 1500 HD
2008 GMC Sierra 1500 HD Classic
2008 GMC Yukon
2008 GMC Yukon XL 1500
2008 Pontiac GTO
2007 Chevrolet Corvette
2007 Chevrolet Silverado
2007 Chevrolet Silverado 1500
2007 Chevrolet Silverado 1500 Classic
2007 Chevrolet Silverado 1500 HD
2007 Chevrolet Silverado 1500 HD Classic
2007 Chevrolet Suburban
2007 Chevrolet Suburban 1500
2007 Chevrolet Tahoe
2007 GMC Sierra
2007 GMC Sierra 1500
2007 GMC Sierra 1500 Classic
2007 GMC Sierra 1500 HD
2007 GMC Sierra 1500 HD Classic
2007 GMC Yukon
2007 GMC Yukon XL 1500
2007 Pontiac GTO
2006 Chevrolet Corvette
2006 Chevrolet Silverado
2006 Chevrolet Silverado 1500
2006 Chevrolet Silverado 1500 Classic
2006 Chevrolet Silverado 1500 HD
2006 Chevrolet Silverado 1500 HD Classic
2006 Chevrolet Suburban
2006 Chevrolet Suburban 1500
2006 Chevrolet Tahoe
2006 GMC Sierra
2006 GMC Sierra 1500
2006 GMC Sierra 1500 Classic
2006 GMC Sierra 1500 HD
2006 GMC Sierra 1500 HD Classic
2006 GMC Yukon
2006 GMC Yukon XL 1500
2006 Pontiac GTO
Instructions
Specifications
SKU: SC-6L80E-CAT1-R
GTIN: 840385613255
Manufacture Name: Suncoast Performance
Shipping Weight: 20 lb
Shipping Length: 16 in
Shipping Width: 20 in
Shipping Height: 12 in
EO Number:
Cross Reference #
Warranty
California Proposition 65 Warning
California Proposition 65 Warning - P65warnings.ca.gov
SC-6L80E-CAT1-R
SunCoast 6L80E Category 1 Raybestos Rebuild Kit
6L80E Rebuild kit includes the following
- New Selective Pump Thrust Washer
- New Filter Assembly
- Torrington Thrust Bearing Kit
- New Bushing Kit
- New Molded Piston Kit
- All New Steel Module
- Raybestos GPZ Friction Module
- Raybestos 3-5-R Z Pak
- Raybestos 4-5-6 Z Pak
- SunCoast Overhaul Kit
- New Pan Gasket
- Sonnax Zip Kit
- Heavy Duty 4-5-6 Backing Plate Setup
The 6L Platform
The 6L80 transmission was manufactured in Ypsilanti, Michigan, at the Willow Run Transmission facility. The 6L80 was a much different transmission than its predecessor and was intended to be replaced in 2006 when it was initially released. This new unit came with a new 32-bit controller integrated into the valve body that stayed in constant communication with the ECM via GM's new high-speed can bus network.
This new design approach in the 6L80 utilizes three-way, variable-bleed solenoids to improve shift quality and consistency which are constantly monitored and corrected by utilizing GM's new adaptive shift strategies. The deep first and second gear ratios of 4.02 and 2.36 offer ample torque multiplication with a nice, tight shift recovery. The 6L80 transmission comes with a factory rating of 440 ft. lbs of torque.
The Cat 1 6L80 Rebuild
The Category 1 Suncoast 6L80 rebuild kit has everything that our Category 0 kit has with the addition of the Sonnax Zip Kit and the upgraded 4-5-6 piston and backing plate assembly.
The Frictions Kit
Raybestos® Powertrain GM 6L80 GPZ Clutch Pack® contains upgraded friction components manufactured with the unique blend of GPZ high energy fibers for ultimate stress and high-temperature durability. This kit also includes the 3-5 Reverse Z Pak® and 4-5-6 Z Pak® to provide solutions to common 6L80 transmission failure points. Z Paks are completely redesigned, single-sided clutch systems that outperform OE in torque and heat capacity, without coning.
Friction Material Composition
Raybestos Powertrain GPZ friction plates greatly increase transmission performance and durability. This state-of-the-art friction material far exceeds OE material to withstand high stress, high temperatures, and repeated cycling. GPZ's outstanding performance benefits are perfect for heavy-duty vehicles and high-stress driving. Testing of GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases.
Recommended Use
High-stress, driving-enhanced performance applications, heavy-duty vehicles, commercial vehicles, daily-driven vehicles and as a problem solution for 3-5 Reverse and 4-5-6 clutch failure.
The Zip Kit
Sonnax Zip Kit 6L45-6L90-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the GM 6L45, 6L50, 6L80, 6L90 valve body. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, clutch apply control, solenoid feed and lockup control circuits. The kit also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing. No special tools are required for installing these parts.
The Zip Kit quick guide provides clear and easy instructions on one sheet to get the unit sealed up and back on the road fast. In addition to general rebuilding tips and technical information, the technical booklet included in this kit contains vacuum testing information and locations at other key areas of the valve body.
- No reaming required
- Installs quickly with no special tools required
- Uniquely designed parts address root causes of valve body complaints by sealing critical pressure circuits
- Detailed technical booklet included with in-depth rebuild and inspection tips for comprehensive valve body repair
Contents
- Pressure Regulator Valve Kit
- Boost Valve Kit
- Clutch Select Valve Spring Kit
- Compensater Feed Regulator Valve Kit
- TCC Regulator Valve, Spring, Shuttle Valve and End Plug
- O-Ringed End Plug Kit
- Actuator Feed Limit Valve, Sleeve and Spring
- Center Support Seal Kit
- Vacuum Test Nut
- Checkballs (8) .250" dia.
The Backbone of the 4-5-6 Clutch
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures exceed OE specifications. The other problem is flexing and bowing of the backing plate (coning), which is a primary source of clutch failure.
The heavy duty Sonnax 4-5-6 clutch apply piston kit 104960-01K addresses these weak areas in two ways:
- A modified OE clutch apply piston and piston dam are used in conjunction with a specially-designed Sonnax piston apply ring.
- A more rigid backing plate
The Sonnax apply ring increases surface area between the apply piston and OE waved clutch plate, resulting in more even distribution of apply force to clutch plates. The Sonnax backing plate minimizes the flexing/bowing when clutch is applied, drastically reducing the likelihood of clutch plate distortion.
- Use with stock clutches and OE waved plate
- Solid backing plate design outperforms OE and aftermarket plates
- Increased apply ring surface area improves clutch apply
- Reduces heat buildup
Contents
- Apply Piston
- Apply Ring
- Piston Dam
- Backing Plate
SunCoast 6L80E Category 1 Raybestos Rebuild Kit