October 2002 Issue
In This Issue
1987-90 Acura Legend: Controller Locations
When a code is stored in 1987-90 Acura Legends, there may be confusion in locating the A/T controller to read the blinking light for codes. In many cases the technician has mistakenly located the engine controller or is trying to find and jump a diagnostic connector that doesn’t exist.
September 2002 Issue
Issue Summary:
After rebuild, 4R44/55E and 5R55E units may exhibit delayed engagement when hot.
Some full-size GM four-wheel-drive trucks may experience a “Service 4WD” indicator light that remains on.
After replacement of the turbine-speed sensor, Ford/Mazda CD4Es may experience a persistent gear-ratio error.
In Daewoo Lanos, Nubira and Leganza, there may be a variety of drivability complaints after repairs.
Technicians may encounter difficulty removing torque-converter bolts in some GM units.
Using the factory-specified fluid is essential with ZF automatic transmissions.
Driveline vibration may occur under certain condi-tions in 2000-model GM trucks with a 4L60-E.
August 2002 Issue
Issue Summary:
A 4T80-E may exhibit suddenly firm shifts accompanies by intermittent ratio codes P0731 and P0732.
After a valve-body exchange during either a rebuild or a repair, an AX4S/AXODE exhibits a harsh upshift into 2nd gear. No codes are present, and a pressure check verifies that line pressure is within specifications.
A new drain-plug transmission kit is available to prevent leaks from the oil-pan plug on Toyota models.
July 2002 Issue
Issue Summary:
Fluid foaming in the 41TE may be caused by the cooler bypass valve in the case under the pump.
Delayed bang engagement on the Honda Civic HX may be caused by several reasons, one of which is a stretched steel belt slipping in the pulleys.
After replacement of a turbine-speed sensor, Ford/Mazda CD4Es may experience a persistent gear-ratio error.
We also have included a special conversion procedure for Mazda-to-Ford ID
June 2002 Issue
Issue Summary:
This month we cover an interesting situation in 1999 and later Mercury Cougars that can be caused by a defective radio.
Persistent codes for throttle-position and/or vehicle-speed sensor on Nissan Quest/Mercury Villager can be caused by lower engine mounts.
A number of factors can cause a shuttle-shift complaint in RE units behind 5.9-liter diesel engines that cycle in and out of lockup at highway speed.
May 2002 Issue
Issue Summary:
Harsh reverse engagement in Volvo AW50-42LE can have four possible causes.
Chrysler RWD units may experience repeated failures from meltdown of the front quick-disconnect line clips. Replace the quick-disconnect fittings with threaded fittings that will not melt.
Revisions have been made to the valve body and spacer plate on Ford AODE/4R70W.
Transmission-fluid leak from the vent in a 4T65-E can be prevented by replacing the upper-channel-plate cover gasket with an updated gasket.
A stator support turned inside the cover of a ZF-5HP-18 in a BMW can cause no power on take-off, neutralizing, bind-ups and failsafe.
Check for a defective mass-air-flow sensor in AX4S/N, AODE/4R70W and E4OD with converter-clutch shuttle.
April 2002 Issue
Issue Summary:
This month’s issue deals with code-retrieval methods on the Isuzu NPR/GMC Forward Tiltmaster for model years 1988 to 2000.
March 2002 Issue
Issue Summary:
This month’s issue features a number of charts that will lead you through the inner workings of this ZF transmission manufactured in Germany: BMW ZF-5HP-19FL.
February 2002 Issue
This month’s issue deals with 1992 and later Ford trucks that are equipped with LCD (liquid crystal display) odometers and experience intermittent or continuous loss of vehicle-speed signal.
January 2002 Issue
Issue Summary:
Mismatching wires of the turbine-shaft-speed sensor on Mazda 929 R4A-EL can cause major headaches.
A timing problem can cause delayed reverse in an E4OD.
In some two-wheel-drive Ford pickups with the E4OD transmission, stacked upshifts can result from the use of a 4×4 wiring harness.
We have information on the new A350 unit in the Lexus GS 300.
Incorrect drive and/or driven sprockets can cause gear-ratio errors in Ford AXODE/AX4S/AX4N units.
December 2001 Issue
Issue Summary:
In a Nissan RE4FO4A or Villager 4F20E, slipping or no second gear may be caused by insufficient spring tension on the 1-2 accumulator piston or a stuck 1-2 accumulator regulator valve.
We have in-depth information on retrieval of diagnostic trouble codes for Nissan vehicles.
Harsh upshifts on electronically controlled Nissan transmissions may be caused by a faulty dropping resistor or a poor connection at the resistor.
In Toyota Previas with four-cylinder engines and A46DE transmissions, stacked shifts or no passing gear may be caused by a broken wiring harness or faulty throttle-position sensor.
GM introduced a new-design overrun roller clutch into the THM 4L80-E as a running change beginning in March 2001. We cover the parts affected by this engineering change.
November 2001 Issue
Issue Summary:
n Acura Legends with G4, L5 & PL5X transaxles, grinding or bind-up in reverse could be caused by incompatible reverse-selector components on the countershaft.
In the BMW ZF-5HP-18, a bind-up with the selector in Manual 2 position, 1st gear, could be caused by a broken D-clutch one-way checkvalve assembly.
A broken clutch-pressure-control spring may cause flared or harsh upshifts on Honda A4RA/B4RA.
We also illustrate Ford CD4E air-check passages.
In 1996-98 Ford E4OD or 4R100, slipping or no reverse and/or no engine braking in Manual 1 or 2 can be caused by a misplaced BS1 checkball.
In earlier E4OD models, slipping or no reverse or no engine braking in Manual 1 or 2 can be caused by misplaced BS1 and BS6 checkballs.
