Sonnax submits a vacuum-test layout for the 6R140 valve body.
Sonnax submits a vacuum-test layout for the 6R140 valve body.
Seal the Deal: Preventing Comebacks with Non-Valve-Body Vacuum Testing
Vacuum testing is not a new process in the automotive field. After engine builders “lapped” a sealable mating surface between valves and their seats, they would use vacuum to test for any leaks that needed to be addressed. Vacuum testing is relatively new to the transmission rebuilding industry, though.
Identifying Converter Components
Whether you are searching through a core pile or looking for a specific part to complete a rebuild, sorting out the various identifying features of Ford E4OD, 4R100 and 5R110W converters can drive you crazy. A six-stud version of each converter that happens to have the same K factor (impeller blade angle) will look almost identical. If you have not educated yourself on the subtle contour differences where the impellers mate to the impeller hubs, or cannot recognize the 0.200″ difference in the relationship of the pilot to mounting pad difference in the 5R110W compared to the E4OD and 4R100, you can become easily frustrated. The following are part-by-part differences, as well as some hints for identifying each one.
Sonnax Vacuum-Test Layout – 45RFE
Sonnax Vacuum-Test Layout – 45RFE
Critical Wear Areas & Vacuum Test Locations
Critical Wear Areas & Vacuum Test Locations
Critical Wear Areas & Vacuum Test Locations
Critical Wear Areas & Vacuum Test Locations
CVT Success: In-Vehicle Isolation of Common Problems
All transmission models have unique problems that are common to that model; Jatco CVT units are no exception. Technicians are facing an uphill battle when it comes to diagnosing and repairing CVTs if they don’t have the right information on hand. Knowing what the common issues are and understanding the options available to isolate and fix problems are the keys to CVT success.
Understanding 4L80-E Overdrive Clutch Failure
Wintertime typically equals a parking lot full of snowplow trucks. Sometimes they represent repeat business — of the bad kind — but most of the time, new work.
Identifying Allison 1000/2000/2400 Valve Bodies
Over the years, the Allison® 1000/2000/2400 valve body has had four versions. This article is written to help identify each version. The first two versions are five-speed and the last two are six-speed valve bodies. The information will explain casting number and separator-plate combinations that work correctly together.
Location and Function of New #8 Checkball for 6L80/90
The 6L80/90 transmission is showing up in shops much more frequently than in the past, as vehicles equipped with this unit get older. Believe it or not, the 6L80 is already 10 years old! 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. This particular transmission is a pretty easy build. 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.
First, Do No Harm – Things you should know about performance servos
We see fewer servos in later-model transmissions, but we still deal with them when rebuilding older units. For the most part it is business as usual, except for a few performance applications where a deeper understanding of servo operation can make all the difference when trying to make a transmission stand up to higher power.
Even Odds
In the world of vehicle repair, independent shops also are competing at a disadvantage. In this case, the odds are stacked not in favor of a blackjack dealer, but rather a new-car dealer. Franchised new-car dealerships have ready access to proprietary technical information, equipment and capabilities that are not available to the aftermarket. However, unlike casino games, fixing cars is much more important than a bit of entertainment; it is the lifeblood for many thousands of people, and affects millions of drivers.
