No forced throttle downshifts
Twenty-five years ago, Chrysler introduced a 0.187-in. (4.77mm) steel, #10 check ball (figure 1, above) in the 42RE valve body which continued to be used throughout the entire RE series of transmissions (42, 44, 46, 47 and 48RE) as they were launched. This small check ball is quite active, having several functions during the course
Troubleshooting Ford 6F35 torque converter one-way clutch failure
It is Friday afternoon at Cooter’s Transmission, and the last of the day’s jobs are being wrapped up. Everyone is getting ready for spirits and good food at Buster’s Pub. A Ford 6F35 from a 2015 Ford Explorer rebuilt earlier in the week is installed, and something is not right. John, the installer, puts it
Shift adaptation issues: Potential causes of a 2-3 shift bump
For shift adaptations to perform adequately, all required inputs must be functional. Of course, the solenoids and transmission components must also be functional. The type of inputs required for shift adaptations to function as designed will have some variations based on year, make and model. For example, when Chrysler pioneered their 41TE clutch to clutch
A needle in a haystack: Finding and diagnosing intermittent problems
A customer brought in a 2013 Ram 3500 6.7L Diesel with the following issues: a CEL, a transmission temperature display on the instrument cluster reading incorrectly, and harsh shifting that would go into limp mode. This customer informed us that he just took delivery of the truck from a Dodge dealership. The dealership was aware of
Fixing JF011E primary pulley pressure sensor issues
A 2.4L Dodge Caliper using a JF011E CVT2 transmission developed a problem with the Primary Pulley Pressure sensor. A low circuit error code P0842 was pulled from the TCM. The sensor ground and 5-volt wiring circuits were checked and verified as good. The signal wire was then inspected and was also verified as good. There
A ghost in your vehicle: Troubleshooting errant voltage from Chrysler TIPM
Many of you may have already experienced various shortcomings from Chrysler’s Totally Integrated Power Module (TIPM). The TIPM contains fuses/relays and integrated circuits that allow for programmed control and distribution of power to components on Chrysler vehicles. The TIPM does not have processing power; it’s mainly a delivery and storage device with vehicle data stored
JF015E CVT sensor blues and red
In past articles in the “Technically Speaking” series, it has been pointed out how easy it is for the primary pulley exciter ring fingers to bend while working on a JF015E continuously variable transmission (as seen in figures 1, above, and 2, below). Ironically, these fingers can become bent while fixing a compromised secondary speed
Where to find wear on the Chrysler 948TE, ZF9HP48
Sonnax has provided the following guide on the critical wear areas and vacuum test locations found in the Chrysler 948TE and ZF9HP48 models. Technicians working on these models should find this guide helpful.
Toyota U660E pressure switch issues
The complaint A 2010 Toyota Venza equipped with the 3.5-liter engine and the U660E transmission has a complaint of setting trouble codes P0872 “TFP Switch C” and P0877 “TFP Switch D.” The pressure switch assembly was ordered from the dealer. As a side note, the car came from a used car dealer. The transmission appeared
Toyota/Lexus U140E suddenly loses reverse
The complaint A 2002 Lexus RX300 with 3.0-liter engine and the A140F AWD Transmission developed a sudden issue: a loss of reverse and no ability to upshift out of first gear. Fault code P0750 “Shift Solenoid SL1 Performance Malfunction” was set. Scan tool data did indicate that the transmission range sensor was operating properly, and
Nissan RE0F11A CVT transmission speed sensor codes, part 2
The complaint All Nissan vehicles using the RE0F11 (CVT7) CVT Transmission may have a complaint of P0715 “Input Speed Sensor A Circuit” stored after overhaul. (They may also have the complaint of P2765 “Input Speed Sensor B Circuit” stored, as seen in our other article). The cause The input speed sensor “A” exciter wheel is
Nissan RE0F11A CVT transmission speed sensor codes, part 1
The complaint All Nissan vehicles using the RE0F11 (JF015E-CVT7) CVT Transmission may have a complaint of P2765 “Input Speed Sensor B Circuit” stored. (They may also have the complaint of P0715 “Input Speed Sensor A Circuit” stored after overhaul, as seen in our other article). The cause The input speed sensor “B” exciter wheel is
