Temp-eramental Hyundai
In this situation it was none of the usual items. It was, believe it or not, the transmission-fluid-temperature sensor. As I looked further into this, sure enough, I found factory bulletin 00-40-010 dated August 2000.
Hooked
We all know how important grounds are in an electrical system, and when it comes to our trade we can tell incident after incident of weird, unexplainable transmission malfunctions that are taking on “fish story” proportions. And, in fact, we have caught quite a few large ones over the years.
Small Tips for Big Rebuilding Headaches Part 2
Many of you who call us for technical support and advice ask for items that fit this description. While we are always open to new ideas for new products that solve root-cause problems, there are times when these parts are already readily available and reasonably priced. It’s just that few rebuilders know about them. So, here are a few brief tips for you on some of the parts you asked for and where you can find them.
Fluid Change Can Cost Big Change ($)
Some of us may remember how in the days of old a C-6 transmission would leave a beautiful filter footprint in the bottom pan. This resulted from the filter opening being too close to the pan. When the pump started sucking, it would pull the pan right up to the filter, and as it vibrated away the filter etched itself into the pan. Of course, that starved the pump and caused premature failure of the transmission.
Indexing TCC-Piston/Damper Assemblies to Turbines
At a recent TASC™ Force meeting, one of the members expressed concern about an increase in the number of worn-out bores in TCC pistons that he was seeing. Although the problem is prevalent in many different pistons, his main focus was on the GM 298mm pistons.
March 2006 Issue
Issue Summary:
A 1996 or later Dodge or Jeep truck using an RE-series RWD transmission behind a gasoline engine can exhibit a chronic code P1763 – “governor pressure sensor volts too high” – causing the PCM to place the transmission into third-gear failsafe.
Shift-solenoid, band-apply and ground-circuit-relay codes are stored in 1990-93 Isuzu Trooper and Rodeo. Shift-solenoid, band-apply and shorted-to-ground or shorted-to-power codes are stored in 1994-95 Isuzu Trooper, Rodeo and Honda Passport, resulting in limp mode.
The Rear Up Front
With four-wheel-drive and all-wheel-drive vehicles being produced in such huge numbers, these trucks and cars have become an important source of repair business for our industry. Transmissions and transfer cases are now a huge part of the repair and reman market. It is also obvious that these designs use both front and rear differentials to transfer power to both sets of drive axles. This has effectively doubled the amount of differential work that will find its way to the repair shop.
Tiburon Spells Trouble
I got a call from a technician about a month ago concerning a problem with a 1997 Hyundai Tiburon with the A4BF1 transmission. The technician explained that the MIL (malfunction indicator lamp) was on and codes P0743 and P0747 were stored.
Small Tips for Big Rebuilding Headaches
Small things are often the cause of problems that can create grief in our everyday operations. Those seemingly inconsequential items can and on occasion do bring production to a halt. What seemed like nothing of great importance now becomes the stopper.
Breaking the Code on Encoders
Transfer cases have become quite sophisticated, and many designs have extensive diagnostic routines. From what we see on tech-line calls and in helping customers resolve field problems, there is a great lack of information and understanding at the shop level. This article is devoted to understanding the electronic shift functions of the New Venture Gear transfer cases.
Upgrading the Cummins Roller Clutch
When the Cummins diesel was offered in 1989 Dodge pickups, it could be purchased with either a manual transmission or a non-lockup 727 automatic transmission. The converter for the non-lockup 727 transmission was very similar to the 400 or AT540 converters and had many internal likenesses. The converter’s historic durability made it a good choice for this demanding application, but this converter also has some historic shortcomings.
A Keen Perception of the Obvious
A no-move 1992 Mazda MPV van was towed into a shop, where it was determined that the planets inside the R4A-EL transmission were toasted. One look at the vehicle and you can see why (see Figure 1). This van recently had been involved in a front-end collision that collapsed the oil-cooler line, causing a lack of cooler flow, and there ya go – wasted planets.
