3 minute read

TRANSMISSION TIPS FROM ZF AFTERMARKET

The ZF Aftermarket experts take a look at transmission diagnosis, service and repair

Although modern transmissions are designed to be efficient and durable, problems can still occur. Regardless of whether a gearbox design is for a manual, automatic or hybrid transmission, workshops can count on the highly specialised system competence of ZF Aftermarket when it comes diagnosis, service and repair.

Causes of errors are diverse cleaning, disassembly, maintenance and – depending on requirements – repair or replacement of individual parts.

Usually, a passenger car (PC) transmission lasts the entre life cycle of a vehicle. However, errors in the shifting process, wear and contamination as well as worn or missing transmission oil can limit functionality – and component damage calls for professional repair.

PC transmissions can be exposed to high stresses on a regular basis, therefore incorrect operation, faulty peripheral vehicle parts or lack of maintenance can quickly lead to damage. Often transmission damage is highlighted by metallic rattling noises or vibrations during gear shifting. In many cases, this is just a matter of replacing small worn components such as needle bearings, synchroniser rings, shift sleeves, and seals or is due to an incorrect oil level.

• Step one: Diagnosis and interpretation of vehicle data: The basis for a reliable diagnosis is the readout of the fault memory and the highly specialised interpretation of all relevant vehicle data using a diagnostic device.

• Step two: Gear unit cleaning: after identifying the causes of the fault, the gearbox is cleaned to remove any stuck deposits and/or dirt residue using sandblasting technology.

The range of Projecta Jump Starters also receive warranty increases and now stand at two years. All revised warranties are for product replacement or refund, depending on customer preference.

Projecta Senior Brand Manager, James Pearson, said the enhanced warranties provided Projecta owners with even greater peace of mind, knowing their investment would perform to expectation.

“Battery Chargers, IP Inverters and Lithium Batteries are popular products within the Projecta range, and we’re pleased to now offer these to our customers with additional levels of support,” James said.

“Due to our rigorous testing and validation, we have the confidence to stand behind our premium product line-up, hence our ability to provide these comprehensive warranties, some of which are industry leading.

“Many of our owners use Projecta equipment in remote areas, in tough conditions and in demanding applications; this is reassurance that our brand can be relied upon no matter what the circumstances.”

For more information, visit www.projecta.com.au

Non-observance of such symptoms can result in massive consequential damage to the internal components, resulting in significantly higher repair costs. Also, unnecessarily high engine speeds and an accumulation of shifting errors can eventually lead to defects.

For manual gearboxes, faulty operation is usually due to the clutch pedal being operated too late or released too early, or to an incorrect gear being engaged. While a frequent operating error with automatic transmissions is shifting from D to R gear while the vehicle is still rolling.

Step by step: Transmission repair

In these steps, ZF Aftermarket has defined the process undertaken by its experts during a transmission repair including fault diagnosis,

• Step three: Dismantling the gear unit: ZF Aftermarket then examines the components inside the transmission. To do this, the transmission is completely dismantled, and the individual parts inspected and, if necessary, measured. In automatic transmissions, the torque converter is emptied, cleaned, and overhauled.

• Steps four and five: Mechatronics repair and inspection: after the repair, manual transmissions are switched through on the assembly trestle and tested for noise.

• Steps six and seven: Assembly and final tests on the test bench: after assembly, the gear unit is filled with new oil. Finally, the software of the automatic transmission is reset to its original state. A final test run of the transmission in the vehicle completes the repair process.

ZF Aftermarket‘s system competence

The central prerequisites for repairing transmission damage are comprehensive specialist knowledge and a high level of diagnostic expertise for gearboxes of all brands.

The worldwide ZF Service Partner network supports independent workshops in complex transmission repairs as a strong and qualityoriented service provider.

ZF Aftermarket also offers spare parts and transmission oils in OEM quality. It says this ensures fast, professional, and reliable repairs, including replacement to series production status.

For more information, visit www.zf.com/au

This article is from: