Mechanical failure:
In our opinion, the mechanical failure is generally one that does not surface on its own. It is for the most part a direct result of a hydraulic OR electronic failure. The mechanical components (moving parts) are subject to wear as a result of poor lubrication or electronically controlled malfunctions of these mechanical systems. Clutch packs, shafts, gears, washers, etc…are just as vital today as they were to the transmissions of yesteryear…but modern day metals, higher heat parameters and better performance of today's units make these parts susceptible to failure when sub-support systems fail.
Hydraulic failure:
The hydraulic failure is becoming more and more common unfortunately. Incorrect fluid or low fluid levels can and will cause insufficient lubrication of those "mechanical" rotating components and can cause the transmission to overheat. This can be catastrophic if not prevented. Below is "self-help" chart to help you better understand the cause of those troublesome leaks.
Leak 1 |
Leak 2 |
Leak 3 |
Leak 4 |
gasket
Fluid pressure or level too high Plugged vent or drain hole Damaged flanges or fasteners |
seals
Fluid pressure or level too high Plugged vent or drain hole Scratches, nicks, etc. in seal bore Improper installations Cracks in a componen |
oil pan
Bolts not tightened to proper specifications (or side cover) Improper installation Gasket damaged Pan or it's mounting surface NOT flat |
case
Filler tube seal or bracket missing OR damaged Cooler fittings loose or damaged Sensor or manual shaft seals damaged Casting that can be porous |
Electronic failure:
An electronic control system failure is a lot more common in today's advanced technology than one might believe. Despite the fact that the mechanical and hydraulic failures are generally the ones talked about they are generally NOT the root cause of failure. Sensor malfunctions and defaults can occur which would provide incorrect input to the powertrain control module (PCM) which could effect line pressures, shift schedules OR shift points and torque converter clutch (TCC) operation. Harsh or erratic shifting would indicate that pressures are too high or too low. Improper shift points taking place may cause internal clutches to stay engaged too long or perhaps not engage at a proper time…causing an outright failure. Torque converter clutch (TCC) operation will drastically affect your vehicle's fuel mileage if it is NOT taken care of. This too, can cause an outright failure before too long.
In closing, it may sound like doom and gloom but it really isn't. The units of today are quieter, smoother and more powerful than ever. They are more energy efficient and have become integral to the diagnostic process. Our words of advice are as follows:
"Take the time to read your service manual. Ask us how we can help keep your vehicle on a healthy maintenance track. Use the recommended fluids for your vehicle and use only quality parts if possible. Driving habits vary. Not every vehicle is going to be treated the same; however, your vehicle is a direct extension of you…therefore, take good care of it and it'll take good care of you."
Your service manager,
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