Note: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are noted with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear. For specific vacuum test information, visit www.sonnax.com.
The effectiveness in diagnosing automatic transmission malfunctions is an art form. Although there are similarities among the wide varieties of transmissions on the road, each transmission has its own peculiarities. Aside from having mechanical, hydraulic, and electrical hardware systems to contend with, software/programming issues and various vehicle platforms make diagnostics much more difficult. Using scopes provides
The effectiveness in diagnosing automatic transmission malfunctions is an art form. Although there are similarities among the wide varieties of transmissions on the road, each transmission has its own peculiarities. Aside from having mechanical, hydraulic, and electrical hardware systems to contend with, software/programming issues and various vehicle platforms make diagnostics much more difficult.
The 6T40 was introduced in 2008 for General Motors front-wheel-drive cars in the Chevrolet Malibu and has gone through several changes throughout its three generations, specifically in the pump area. The 6T40 is closely related to the more lightweight 6T30 and the heavier duty 6T45 and 6T50. Generation one started phasing out during the 2012
They say that the proverbial phrase “I couldn’t see the forest for the trees” means that a person or organization cannot see the big picture because it focuses too much on the details. Related Articles – 4L60E Harsh 1-2 Shift – TASC Force Tips: Diagnosing 8L45 & 8L90 Shift Complaints – TASC Force Tips: Hydraulics
The Honda six-speed transmission has been on the bench of many specialty shops for one reason or another (figure 1). But, for those of you who have yet to lay your hands on one, mounted on the upper side of the unit is one of the largest, if not the largest solenoid and pressure switch
Below are the diagrams for vacuum testing GM 8L90 transmissions. 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. A low vacuum reading indicates wear. For specific vacuum test information, refer
Sonnax highlights its line of heavy-duty input shafts for GM 4L transmissions. The company touts the torsional design that allows energy to be absorbed, reducing peak loads to critical areas. Related Articles – Raybestos introduces 10R80 conical torque converter wafers – 13 BorgWarner OEM/S solenoids move to Rostra – Gray Tools releases insulated socket sets
Sonnax has provided the following guide on critical wear areas and vacuum test locations for the Toyota/Lexus UA and UB lines of transmissions. Technicians working on these models should find this guide helpful. Related Articles – Manual transmissions in 2023: Some are still sticking with it – Inside Toyota’s UA-UB80E/F torque converter – Manual transmission sourcebook
Sonnax has introduced a new bypass blocker valve kit for Ford 6R140 transmissions, model years 2011 to 2016. The company says this kit is made to replace the faulty thermal element lineup in these transmissions to prevent the potential of overheating. The kit (part no. 126740-26K) includes a drop-in Zip Valve for installation. Related Articles
Sonnax has introduced a Sure Cure kit for rebuilders of GM 6L80/6L90 transmissions. The company says this kit can restore shift quality and repair common TCC trouble areas, offering products to help rebuilders repair worn areas and protect the transmission against future damage. The kit is part no. SC-6L80-6L90. Related Articles – GFX introduces two
