6T70 Gen2 VTG
2018-08-09
: Sonnax 6T70-Gen2 Vtg 6T70-Gen2_VTG 661 file tech_resource uploads
Open the PDF directly: View PDF 
.
Page Count: 4
| Download | |
| Open PDF In Browser | View PDF |
GM Gen. 2 6T70, 6T75, 6T80 Critical Wear Areas & Vacuum Test Locations 20 15 10 25 NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear. 5 0 30 VACUUM TEST Upper Valve Body • 6T70 (Gen. 2) Shown 3-5 Reverse Clutch Regulator Valve • Burnt 3-5 Reverse clutch • Delayed Reverse • 3rd & 5th Shift concerns • 2-3, 4-5 Flare Pressure Regulator Valve • High/Low line pressure • Slipping/Burnt clutches • Harsh/Soft shifts/apply • Transmission overheat • Low/No cooler/lube flow Isolator Valve 2-6 Clutch Regulator & Gain Valve • Low line pressure • Line pressure instability • No line rise • Burnt clutches • Harsh shifts • Shift concerns Replace with Sonnax Part Nos. 124740-16 (Spring Only) 124740-03K (Isolator Valve Kit) TCC Control Valve • Excess TCC slip • Overheating • Low cooler flow • TCC apply codes • TCC apply & release concerns • Low converter & lube flow • TCC lining failure Replace with Sonnax Part No. Test 124740-14K Together Requires F-124740-TL14 & VB-FIX Test Together • Code P0741, 742 • TCC slip • Harsh TCC apply • Loss of fuel economy • Low TCC apply pressure • Overheated fluid & TCC lining Replace with Sonnax Part No. 124740-24K Requires F-124740-TL24 & VB-FIX TCC Regulator Apply Valve • Burnt 2-6 clutch • 2nd & 6th Shift concerns • 1-2, 5-6 Flare • Various shift concerns • Shift codes L/R Overdrive Clutch Regulator Valve • Burnt L/R and/or 4-5-6 clutch • 4-5-6 Shift concerns • Delayed Reverse • 3-4 Flare Clutch Select Solenoid Valve #3 Test Together Test Together Clutch Select Solenoid Valve #2 • Various shift concerns • Shift codes O-Ringed End Plugs • Pressure loss • Shift concerns • Burnt clutches • TCC apply concerns NOTE: Vacuum test end plugs at outboard port while sealing bore opening with thumb. Replace with Sonnax Part No. 124740-02K NOTE: Several Locations = ©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company 866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Click on Sonnax part numbers to see more information. 6T70 Vac Test Guide 08-09-18 Page 1 GM Gen. 2 6T70, 6T75, 6T80 Critical Wear Areas & Vacuum Test Locations 20 15 10 25 NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear. 5 0 30 VACUUM TEST Lower Valve Body • 6T70 (Gen. 2) Shown Click on Sonnax part numbers to see more information. 3-4 Reverse Clutch Boost Valve • Burnt 3-5 Reverse clutch • Delayed Reverse • 3rd & 5th Shift concerns • 2-3, 4-5 Flare Plug port on back. 4-5-6 Clutch Accumulator Piston Actuator Feed Limit Valve • Harsh shifts • Low clutch pressure • No/Slipping shifts • Solenoid codes • Harsh 3-4 • 3-4 Flare • Burnt 4-5-6 clutch Plug port on back. Plug port on back. 4-5-6 Clutch Boost Valve • Burnt 4-5-6 clutch • 4-5-6 Shift concerns • 3-4 Flare 1-2-3-4 Clutch Boost Valve • Burnt 1-2-3-4 clutch • Delayed Forward • 1-2-3-4 Shift concerns Plug port on back. Plug port on back. 1-2-3-4 Clutch Regulator Valve • Burnt 1-2-3-4 clutch • Delayed Forward • 1-2-3-4 Shift concerns ©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company 866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com 6T70 Vac Test Guide 08-09-18 Page 2 GM Gen. 2 6T70, 6T75, 6T80 OE Exploded View Upper Valve Body • 6T70 (Gen. 2) Shown NOTE: Depending upon vehicle application, the OE springs shown may not be present. 101 110 102 109 103 108 104 107 105 106 6T70 (Gen. 2) Upper Valve Body Descriptions I.D. No. Description 101 Pressure Regulator Valve 102 Isolator Valve 103 TCC Control Valve 104 Clutch Select Solenoid Valve #3 105 Clutch Select Solenoid Valve #2 106 Manual Valve 107 L/R 4-5-6 Clutch Regulator Valve 108 TCC Regulator Apply Valve 109 2-6 Clutch Regulator & Gain Valve 110 3-5 Reverse Clutch Regulator Valve ©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company 866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com 6T70 Vac Test Guide 08-09-18 Page 3 GM Gen. 2 6T70, 6T75, 6T80 OE Exploded View Lower Valve Body • 6T70 (Gen. 2) Shown NOTE: Depending upon vehicle application, the OE springs shown may not be present. 201 206 205 202 203 204 6T70 (Gen. 2) Lower Valve Body Descriptions I.D. No. Description 201 4-5-6 Clutch Accumulator Piston 202 1-2-3-4 Clutch Boost Valve 203 1-2-3-4 Clutch Regulator Valve 204 4-5-6 Clutch Boost Valve 205 Actuator Feed Limit Valve 206 3-5 Reverse Clutch Boost Valve ©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company 866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com 6T70 Vac Test Guide 08-09-18 Page 4
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.7 Linearized : Yes Language : en-US XMP Toolkit : Adobe XMP Core 5.6-c143 79.161424, 2017/09/22-11:52:47 Create Date : 2018:08:09 11:37:36-04:00 Metadata Date : 2018:08:09 11:37:37-04:00 Modify Date : 2018:08:09 11:37:37-04:00 Creator Tool : Adobe InDesign CC 13.1 (Windows) Instance ID : uuid:d154c78f-7862-4106-8074-adaffaf1afa5 Original Document ID : xmp.did:9F571B58FC5FE211BB0CAB0CF77DDCA2 Document ID : xmp.id:f03acd79-0961-fe41-974c-4e50307d3a69 Rendition Class : proof:pdf Derived From Instance ID : xmp.iid:1c2c939d-50c3-a645-a5b7-d99e2d1b5d56 Derived From Document ID : xmp.did:a18a8077-e7a1-b543-aafa-1c428e5d2be0 Derived From Original Document ID: xmp.did:9F571B58FC5FE211BB0CAB0CF77DDCA2 Derived From Rendition Class : default History Action : converted History Parameters : from application/x-indesign to application/pdf History Software Agent : Adobe InDesign CC 13.1 (Windows) History Changed : / History When : 2018:08:09 11:37:36-04:00 Format : application/pdf Producer : Adobe PDF Library 15.0 Trapped : False Page Count : 4 Creator : Adobe InDesign CC 13.1 (Windows)EXIF Metadata provided by EXIF.tools