Tech Tip: GM 6L80, 6L90 Low Line Pressure Repair
After installing the service pump cover, a transmission may have low line pressure. Models 2006-2015 GM Passenger Cars and Trucks equipped with 6L80 or 6L90 Automatic Transmission (RPO MYC or MYD) Condition After installing the service pump cover P/N 24248573, a transmission may have low line pressure. If the low line pressure is not identified
68RFE Overdrive Clutch Failure
What to Check First When Troubleshooting OD Issues
Tips for Safe Pressure Switch Removal
When disassembling a Toyota/Lexus U660E valve body, pay close attention while removing the pressure switch from the valve body.
6R140 Transmission Solenoid Strategy Code
When replacing solenoids, plan ahead and order the correct band numbers that came out of the transmission in the same location as they came out of.
Hydraulic Fundamentals: AFL/Solenoid Modulator Valves
Knowing your transmission’s hydraulic circuit — and solenoid circuits in particular — can be very helpful when identifying the underlying cause.
The Problematic CVT 7
Wayne Colonna breaks down the problematic nature of the CVT 7.
Hydraulics: Converter Limit Valves
This article is one of a series by Sonnax exploring how valves and hydraulic circuits work and what results when they quit functioning correctly.
Slamming reverse in MAXA
In this Shift Pointers, Wayne Colonna tells the story of a MAXA transmission slamming into reverse in a Honda Accord.
Fast and Simple
Wayne Colonna describes repairing a BYFA-family transmission with shift complaints.
Hydraulics Fundamentals: Manual Valves
An understanding of hydraulics is essential for properly diagnosing and repairing transmission problems. This article is one of a series by Sonnax exploring how valves and hydraulic circuits work and what results when they quit functioning correctly.
Tasc Force Tips: Ford E4OD, 4R100
Ford E4OD, 4R100
Critical Wear Areas & Vacuum Test Locations
An Inexpensive Fix for the 4R70W
The bearing that is being used in this updated carrier is exactly like the one Ford uses in their 5R110W transmission for the front planetary. If your shop can lay hands on extra captured needle bearings, the fix is easy. Knock out two small pinion gears and you gain easy access to the bearing for replacement.
