0000002684 00000 n s��N�ps���B��3gS�z�})}כ��/�` t_�u w�$f? Clean the gasket-mating surface on the transmission from oil, grease and any other contaminates, using a soft wire brush and clean shop rag. 0000010089 00000 n All 6L80/6L90 transmissions will utilize the new design by the end of 2012. For 6L80/90, when drive is selected from park/neutral, 1st gear is commanded “with engine braking,” which means the low reverse clutch is applied. Step 3. Shift solenoid and PCS operation is controlled by the TEHCM (TCM). Automatic Transmission: Tech Tip: GM 6L80, 6L90 Low Line Pressure Repair, Automatic Transmission: The Problematic CVT 7, Automatic Transmission: Slamming reverse in MAXA, Industry News: Babcox Media Mourns the Passing of Tim Fritz, Longtime Editor and Friend, Products: GM 4L60/65/70-E AX Code Accumulator Valve Sleeve, Products: 47/48RE SFI-Certified Flexplate Shield, Products: Replacement Metal-Clad Seal for Mercedes 722.9 7G-Tronic, The Future of Heavy-Duty Truck Transmissions. As vehicle speed increases, the TEHCM monitors inputs from various sensors to determine when to turn engine braking off before the 1-2 upshift (Figure 2). 0000037922 00000 n In this instance we are going for the center pocket — not the side or even the corner pocket. The same thought process typically goes for the valve body. Tool number J 47825-1 Solenoid test plate and jumper harness Remove the Control Solenoid Valve Assembly from the transmission. 33 0 obj <>stream The fluid should drip out the level control hole. Attach the electrical wires to the shift solenoid using the Phillips screwdriver. FREE Shipping on orders over $25.00. 0 xref The Hydra-Matic 6L80 (production code MYC) is a six-speed automatic transmission produced by General Motors for use in rear- and rear-biased all-wheel-drive vehicles with a … 0000000954 00000 n Each layout: Displays an exploded view location guide for individual valve trains 12 22 endstream endobj 13 0 obj <>>> endobj 14 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 15 0 obj <> endobj 16 0 obj <> endobj 17 0 obj [/ICCBased 28 0 R] endobj 18 0 obj <> endobj 19 0 obj <> endobj 20 0 obj <> endobj 21 0 obj <>stream Then we flip the halves over on the bench, dumping the checkballs and draining the excess oil in preparation of a thorough cleaning in the solvent tank. The #1 ball is in play in Drive, from 1st - 6th gears. For 6L80/90, when drive is selected from park/neutral, 1st gear is commanded “with engine braking,” which means the low reverse clutch is applied. GM Genuine Parts 24230298 Automatic Transmission 1-2 and 3-4 Shift Solenoid Valve $13.53. 6L80/6L90 "No Movement" After Repair. First we disassemble the TEHCM, then we split the valve body halves and remove the separator plate. #1 Drive 1-6/Drive Braking: Located in the upper control valve body, this “ball shuttle valve” style check ball allows drive braking 0000002942 00000 n The line pressure sensor and the TCC variable force solenoid bolt directly onto the valve body and are not part of the solenoid … 0000001052 00000 n I have a 2010 Silverado with the 6L80 transmission. An update to the 6L80 and 6L90 (RPO MYC, MYD) transmission output ring gear and output shafts began to enter production starting with the March 2012 applications. startxref H�\��n�@��bb�M\�'�} ��%�q��w�ؤ$��ρ��%]m��&}]����[�=u�P�����,3M[׭�>V}����r����. Ford/Mazda 4F27E/FN4A-EL Shifts from Second to Neutral, Babcox Media Mourns the Passing of Tim Fritz, Longtime Editor and Friend, GM Investing $100M in Transmission Plants, Chrysler 47RE, 48RE Extreme Duty Output Shaft, Location and Function of New #8 Checkball for 6L80/90. The added #8 checkball slowing down the rate of the low reverse clutch can help make the transition from 1st gear engine braking to 1st gear a little more seamless. 0000002573 00000 n These valves are responsible for the flow of fluid inside the transmission. This is an odd complaint. 6L80E Check Ball Locations We have been made aware of a problem with the plastic #1 check ball eroding from .250” to .180” and getting stuck in the plate. This particular transmission is a pretty easy build. GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout. See Figure 5 for location of #8 ... (Early, 2nd design) to prevent code P0751, shift concerns and burnt/slipping 1-2-3-4 and/or 3-5-Reverse clutches. … The #8 checkball seats and forces this exhaust through an orifice, slowing down the release of the low reverse clutch. When the eighth checkball was added, the separator plate also changed (Figure 4). Get 6L90 transmission rebuilding tips, 6L90 troubleshooting help, 6L90 technical service bulletins, 6L90 diagnostics and 6L90 technical information from … As you can see, the comparison of a low speed “lift foot” upshift is close to this complaint, but not the same because we are still in 1st gear. The shifting solenoid on a Chevrolet S-10 pick-up is designed to regulate when the transmission shifts. Figure 2: 2014-Later 6L80/90 1st Gear; As vehicle speed increases, the TEHCM monitors information to determine when to turn solenoid 1 off and energize CBR1/4-5-6 solenoid to block pressure to clutch select valve 2. 0000003438 00000 n 12 0 obj <> endobj GENERAL DESCRIPTION SHIFT QUADRANTS The new Hydra-matic 6L80 (6 Speed) is a fully automatic, six speed, rear wheel drive, electronic ... located within the transmission. GM Genuine Parts 24212327 Automatic Transmission 3-2 Shift Solenoid Valve $22.95. A partial circuit diagram shows shift solenoid 1 is “ON,” which moves clutch select valve 2 to the left, connecting a passage from CBR 1/4-5-6 pressure to the low reverse clutch apply passage (Figure 1). Shift Solenoid Complaints Solenoid “A” complaints: Starts in 2nd. 0000000736 00000 n Details. Pressure test port: passenger’s side behind bell housing. 0000006891 00000 n This solenoid is part of the electronic transmission control system, and is controlled by the powertrain control module, or PCM. Shift Solenoid 1 Actuator feed limit fluid feeds the shift solenoid 1 fluid circuit to control clutch select valve 2. 0000004221 00000 n $ ڸ��N�,�- YVr In Stock & Ready to ship this high quality replacement set of 4L80E transmissions solenoid. This is the smallest section that the G solenoid fits into and has a hole in the corner for the tube (Figure 5). Installing this service package can help eliminate this complaint on ’10-later 6L80/90 applications. Under Pressure: Shift Quality & Pressure Switches in TEHCM Applications. The S8 fault control shift solenoid controls the default override valve. PC Solenoid 4 B No Flow On: Full Flow Off: No Flow PC Solenoid 5 F No Flow On: Full Flow Off: No Flow Shift Solenoid 1 H No Flow On: Full Flow Off: No Flow Shift Solenoid 2 D No Flow On: Full Flow Off: No Flow TCC PC Solenoid E No Flow On: Full Flow Off: No Flow Chart 1 A Look at the 6L80; Part 3 of 3, Internal Transmission Diagnosis Figure 1 When complete, shift vehicle back into PARK. H�\�Ao�0���>��*���E��(���O�����HʼnL8���ɠ>�E�|Qv=3�:_o7�Ѝ&��f�Gs�B����ƛ�?v!�����4�7�z��Լ��GچC�U������1^�ݪ���>��c�c���s��7��2����hff�4�?��^��>y�Om�6����C��W�q�)��9�4}��C��X��ϪY���zI�2��ｽ���W��@�l�n�Kr ^��� y~!�ū��%z�9y.��k�X���-ق��`Gv�G�#xE^%j ��Z-��@K�%�j ��Z-Y�`��g�3�yy-�Z�ԵеԵеԵ�U�T�T�+���ze�N��������Ş(�D�'J� 0000063322 00000 n Shift transmission through entire range – hold in each range for at least three (3) seconds. 0000002425 00000 n H��WMs����WtU.� af�E�v�kWR��,Y�J�� ��/�)�N��y� E1���KA =ݯ_�i�:��n�C;��vлf��������yK��P��l��n�H��~�#���с&�x��I87��L>yKi?�v�/S�?�j�l�{�R���,�f�Ug���y�׉�m��L�p��x���/E��F-�`1���Oޛ��*s�`�9�˦vN?����/m{(��%�^i�G^�L��v�����M���;���8�wY�RS�R��z�e-��x�f��^��o�)ݮ���]VU�}����8�V6]��L�黿��?U��\�p�ԃ͏9���]�SI�,�dm�ػڠ\\L�( )1)���Ic�zE���W�����P)#R��'šx�����Q https://www.novak-adapt.com/knowledge/transmissions/automatic/6l80 0000003691 00000 n Remove Level Control Plug. endstream endobj 24 0 obj <>stream ���0+� 0000006644 00000 n %%EOF ���Q�>���̥ȥ����̨Ȩ̨���!��gώ�ώ�� Cx�6�c:5�w֛K�i̧�5�7&���� �`R~ُ lp� October 28, 2014. Notes: Solenoid, Shift, 3-2 Downshift and PWM TCC-Lock-Up Apply, 1-2-Required. The S9 1-2-3-4-5 reverse boost shift solenoid controls the 1-2-3- 4-5 clutch boost valve (figure 6). Pressure test specifications, have transmission full of fluid and warmed to operating temperatures, Use scan tool to command EPC solenoid for test. 0000001427 00000 n Today we will showing how to test and replace shift solenoid valves. Believe it or not, the 6L80 is already 10 years old! By activating and deactivating the solenoids in a predetermined pattern by the PCM, 4 distinct gear ratios can be achieved. 6L80, 6L90; Dodge-Cummins Diesel; ... A 62TE solenoid pack has six shift solenoids, one line pressure solenoid, a temperature sensor and five pressure switches. A partial circuit diagram shows shift solenoid 1 is “ON,” which moves clutch select valve 2 to the left, connecting a passage from CBR 1/4-5-6 pressure to the low reverse clutch apply passage ( Figure 1 ). 0000088674 00000 n General Motors provides a service package under part number 24272467 that includes the ’14-later separator plate and eight checkballs that will retrofit back to ’10-later models (Figure 5). h�b```"'V�LA��2�0p4�lJg`�^�Т����:�渐��� �g�耨 ӂ��P�HfC1�2?� GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout. A slipping transmission will actually shift, but then not produce any power once in gear, whereas a bad solenoid will prevent the shift from occurring in the first place. You'll receive the 1-2 solenoid and the 3-4 solenoid in this kit. Late type 2-3: Valve assm-Solenoid “B” #10478148 Normally Open: 12V shuts off flow. DACCO is no longer supplying torque converters. 0000001884 00000 n In Stock. %PDF-1.5 %���� The orifice indicated was reduced to .054 inches to help slow down the exhaust of the low reverse clutch during the transition from 1st gear engine braking to 1st Gear. After their third overhaul, most builders would tear down the internal components and dump everything into a basket, run it all through the parts washer and start rebuilding and reassembling after the parts are cleaned. GET SOFTWARE:http://www.autodiagnosticsandpublishing.com/Software_Catalog.htmlTransmission Shift SolenoidExplains the Shift Solenoid testing. Ships from and sold by Amazon.com. In Stock. <]/Prev 159830>> Modulated main pressure housing casting #29539796. September 23, 2014. A PCS is required to prevent the transmission from seizing up from lack of fluid or bogging down as a result of too much fluid. )K�~ă�!\�ݲ�v:Iҷ�hh���}���n�}��G������4��z����&c��&o��}����y��d���2u�詯j �?hRN�0�s\����qk����*$e���Ӹ��"�"�ܟc>#��9��,d?��s�فɏ`�Y��5y ~"?��ɱxYг�g�{�Wa�L�nB7��0+� A Look at the GM 6L80; Part 1 The first of ten new 6-speed automat-ics, the 6L80 was intro- ... • Remove the level control plug located in the transmission oil pan. 0000006128 00000 n For availability and technical support, call TC Remanufacturing at 1-800-882-6089. We all know that if the low reverse clutch is still on during a 1-2 upshift, we will have a severe bind-up. The cost to replace a failed transmission torque converter clutch solenoid is determined, in part, by the vehicle year, make and model. GM 6L45, 6L50, 6L80, 6L90 Vacuum Test Guide ↑ The 6L80/90 transmission is showing up in shops much more frequently than in the past, as vehicles equipped with this unit get older. Notice in Figure 1 that pressure is fed through our recently added newcomer, checkball #8. (I'm fairly mechanically inclined) and if I could do it myself, any tips? This action allows clutch select valve 2 to move to the right by spring force, connecting the low reverse passage to an exhaust. endstream endobj 22 0 obj <> endobj 23 0 obj <>stream No 4th [May have code 82] Solenoid “B” complaints: [May have code 81 and also 68] Starts in 3rd, bindup in “1". The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. Hopefully this information will help if you ever run into a question of where to put the eighth checkball. �����B���9���^2ދ��������������ߋ�{q�t�t�t�t�t�t�t�t�t�t�q�Y�� Easy Pressure Switch Rebuilds for 6L- & Gen. 1 6T-Series Units. ��83�7�e�¾ǪAN@���U:g�1��)� Without scan tool you will have approximately 45-80 psi at idle and upwards of 300 in gear at Step 2. Refer to Figure 3 for the location of the new #8 checkball, which is near the center of the valve body. 0000007440 00000 n (Ƹ팘Ĩ^�6���m�t�x�ڸ��wt�]�t[�������M~EBB3v�Q�d�̈́7?,�W��{j��ss*����fn|��{�&��u����. Transmission power control solenoid -- PCS -- valves are duty cycle-controlled components that manage the pressure of transmission fluid. trailer 0000000016 00000 n Stay up to date by signing up for Transmission Digest newsletters. August 21, 2013. It turns out that, sometime in 2014, changes were made to the separator plate and a checkball was added to address some concerns related to a clunking sensation during both acceleration and deceleration in 1st gear. The only issue here with the 6L80/90 is that there are eight checkballs lying on the bench, not seven! Other factors, such as where the work is done (whether at a local auto repair shop, car dealership or you do-it-yourself) also factors heavily into the … The two, three-port, on/off, normally closed shift solenoids — S8 and S9 — are also referred to as normally low solenoids. Figure 4 also shows separator plate identification for the ’14-later plate. Electrical check: 20 to 30 ohms pin to pin.. As time flies by and we get familiar with rebuilding a specific transmission, we store in our memory more and more details of the disassembly and reassembly of specific items — such as the pump, input drum and valve body — to the point where it becomes second nature. My pressure control solenoid went out (stuck open). 0000002460 00000 n When shift solenoid 1 is energized (ON), actuator feed limit fluid is allowed to pass through the solenoid, thereby creating solenoid 1 control pressure, as shown in Figure 10. 6L80/90 technical information. Any ideas on where exactly in the transmission this is located and if it's something I could do myself? 6L80 Code (DTC) P0752 Shift Solenoid A Stuck On; 6L80 Code (DTC) P0753 Shift Solenoid A Electrical/1-2 Shift Solenoid Circuit Electrical; 6L80 Code (DTC) P0754 Shift Solenoid A Intermittent; 6L80 Code (DTC) P0755 Shift Solenoid B Malfunction; 6L80 Code (DTC) P0756 Shift Solenoid B Performance or Stuck Off/2-3 Shift Solenoid Valve Performance After the cleaning process, vacuum testing and replacement of worn valve trains, we start the assembly process by installing the seven checkballs into the valve body. When the TEHCM sends the signal to turn “OFF” engine braking in 1st gear, shift solenoid 1 is de-energized and CBR 1/4-5-6 solenoid is ramped up to block pressure to clutch select valve 2. GM 6L45, 6L50, 6L80, 6L90 Figure 1 Figure 2 Machined-Figure 2 Down Boss Valve Body Casting Identification ... location and size in determining if #8 checkball is used. Install the new shift solenoid, and tighten the mounting bolts using the ratchet and socket. Remove Fill Plug. If so, the fluid level is okay. This action allows clutch select valve 2 to move to the right connecting the low Reverse passage to an exhaust. Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. October 27, 2014. This pocket has always been there, but was always vacant until 2014. The PCS is found on the body of the transmission. It almost sounds like a low speed “lift foot” upshift of sorts, but this is not the case. Read the most recent edition of Transmission Digest.
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