Shift pointers: Tricky sensor situations
Sometimes you’re the windshield and sometimes you’re the bug—a phrase many of us have heard and experienced. It’s inevitable. The idea is to be the windshield as much as possible. Shane from Cottman Transmissions had a helluva day but in the end, he was the windshield. In his shop he had a 2016 Explorer using
Look for the little details: Three transmission repair case studies
Below are three examples of trucks that came into transmission shops, yet either did not have a transmission problem, or had a simpler issue than it originally seemed. Read on for the stories. Case study 1: Chevrolet 2500 HD Our first example features a 2006 Chevrolet 2500 HD 2WD. It has 76,257 miles on the
CVT maintenance basics
On the maintenance side, a continuously variable transmission (CVT) requires more or the same frequency of fluid and filter changes as a conventional automatic transmission, and many of the basic procedures are the same. On the diagnostic side, a CVT transmission is less complicated internally than a six- or nine-speed transmission. Like any automatic transmission,
Mercedes-Benz 722.9 no forward movement after overhaul
The complaint A 2007 Mercedes-Benz CLS550 with the 722.9 transmission has an after-overhaul complaint of no forward movement. The cause The B2 Brake Housing inner apply piston was installed upside down—refer to the image above, left. The correction The B2 Brake inner apply piston was re-installed in the correct position, after which forward movement returned,
Land Rover LR3 ZF6HP26 no start after overhaul
The complaint A 2006 Land Rover LR3 equipped with the ZF6HP26 transmission has a post-overhaul complaint of a no-start condition. Part of the transmission overhaul process included the replacement of the mechatronic unit. The cause The mechatronic unit that was purchased from a parts distributor and installed was for a Ford 6R60 transmission (figure 7)
Infiniti G37 RE7R01A chassis codes set
The complaint A 2013 Infiniti G37 equipped with the RE7R01A transmission and the EXT13C transfer case has a complaint of trouble codes C1204 “4WD Solenoid Malfunction” and C1105 “Right Rear Wheel Speed Sensor Fault” stored. Due to extensive damage, the transfer case was replaced, which did not eliminate the stored codes. The shop then replaced
Honda Accord BB7A six-speed: P2720 code set after collision
The complaint A 2015 Honda Accord with a 3.5-liter engine and the BB7A six-speed transmission (seen in figure 1, above), was involved in a minor collision to the left front of the vehicle. The vehicle was drivable and was taken to the transmission shop. Vehicle diagnostics revealed a P2720 “Pressure Control Solenoid D Voltage Low”
Troubleshooting RFE overdrive clutch failure: Three key areas to check
Fighting overdrive failure in Chrysler RFE transmissions can be a frustrating task. You build the unit, and a week later, it’s back with the overdrive clutches burned up again. It happens with every one of them, from the 45RFE, 545RFE and 65RFE to the 66RFE and 68RFE. You have replaced the valve body and double-checked
The 6R140 torque converter: Common fault codes and how to rebuild
There are many reasons for converter clutch slip codes to occur in vehicles equipped with the Ford 6R140 transmission. One is bore wear in the valve body with any one of the three valves related to converter clutch apply and release. Low line pressure could be another. But there is a third that is inherent
Shift Pointers: Getting the 10R80 shaft
The Ford 10R80 family of transmissions has become known for the CDF clutch cylinder sleeve moving out of position. An updated drum has been made available by Ford with a “no-walk” backing lip to prevent repeat failure. After this cylinder has been replaced, there still may be another problem still lurking in the transmission that
Volkswagen dual clutch transmission and direct shift gearbox: What you need to know
Most of the drivers who own a Volkswagen car or truck with a Direct Shift Gearbox (DSG) will not know they have a dual-clutch transmission connected to the engine. Most of them will think they have an automatic that gets excellent gas mileage. It is not until a transmission component fails or a service interval
Diagnostic tips for the Ford 6F35
We have all experienced repairs that seem to “go down the rabbit hole,” as we call it. Our subject today is one such issue: a Ford 6F35 transmission with codes P073D or P177F after repair and a complaint of trying to go into Reverse while in Neutral, or a bind in Forward when cold. This
