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.
October 2001 Issue
Issue Summary:
1997-2000 Ford F-150/F-250 pickups with 4R70W transmissions may have driveline vibration and rear-seal leaks.
Cooler leaks on 2000-01 Ford Explorer/Mercury Mountaineer four-door vehicles with 5R55W transmissions may be caused by contaminants on the cooler tubes.
On 2000 Cadillac Devilles, Eldorados and Sevilles and 2001 Oldsmobile Auroras with 4T80-E transaxles, slipping in fourth or no fourth gear with code P0734 may be caused by a warped lower-control valve-body channel plate.
No movement or delayed engagement in a BMW with the ZF-5HP-18 may be caused by a shrunken bypass ball.
We have furnished typical relay checks for Chrysler’s 41TE, 42LE and 42RE transmissions. Once the operation of a relay is understood, any relay can be checked with ease.
September 2001 Issue
Issue Summary:
This month’s issue covers a variety of complaints on Mercedes Benz vehicles, including harsh reverse or delayed reverse engagement in 722.3, 722.4 & 722.5 units, and slipping on take-off on models equipped with the rear-pump-elimination kit.
In AX4S/AXODE units, solenoid-wire connectors installed on the wrong solenoids may cause harsh shifts, a clicking noise and tie-up on shifts.
We have listed the vehicle-harness repair kits that are available for several different Ford transmissions.
Failure of the exhaust-brake system on Isuzu NPR/GMC Forward Tiltmaster vehicles could be caused by elevated line pressure and premature transmission failure.
August 2001 Issue
Issue Summary:
In the General Motors THM 4L80-E/4L80-EHD, no converter clutch, trouble code 68 in Overdrive and trouble code 39 in Drive 3 may be caused by an incorrectly installed TCC enable valve.
A blown fuse in 1991-95 Cadillacs equipped with the THM 4T60-E can cause 3rd-gear starts before or after overhaul.
In Saturn MP6/MP7 units, delayed or harsh reverse engagement and repeat failures of the external filter seal may be caused by a broken spring or bore wear.
The new center support for the Ford A4LD will retrofit as long as the new selective No. 4 and No. 3 thrust bearings are used.
