LOCK-UP KITS

Available for 200 Series, Hilux, Prado and Fortuner

Morris Motors is the proud Stocklock Torque Convertor Lock-Up dealer for Northern and Central Victoria. With the combination of many years experience in diesel performance and a huge investment in state-of-the-art test equipment, we make good vehicles even better.

StockLock Torque Converters Logo

What is torque-convertor slippage and what does a lock-up kit do?

Many of you would notice the tacho in your vehicle fluctuating/flaring under load or driving on undulating roads. A lot of the time this isn’t the vehicle down-shifting, but potentially the torque convertor in your automatic transmission locking and unlocking. When the torque convertor is locked, it basically provides direct drive to your wheels similar to a manual vehicle. When the torque convertor is unlocked it has the opposite effect similar to that of a slipping clutch in a manual vehicle. Not only does this restrict the drive to the wheels, but also creates a massive heat spike in your transmission temperatures and an excess in your fuel consumption.

A lock-up kit consists of several electronic components wired into the vehicles transmission lock-up solenoid, which effectively locks and keeps locked the torque convertor at a set point. We generally set the torque convertor to lock up at 84km/hr and above and once below 78 km/hr it will automatically unlock and resume the transmission's lock and unlock procedures as normal. Up and down gear shift operation still remains – it’s only the slippage in those gears that is removed when the system activates. (A high/low system is also available for sand driving that will engage at a lower speed, when used in sports shift manual mode).

The standard Stocklock Torque Converter Lock-Up Kit is fully automated, meaning it turns on and off automatically and can also be completely turned off with a push of a factory-style button at any time. This system is the most technologically advanced lock-up kit on the market, using pulse-width modulation to give a soft start and slow release when locking and unlocking. Pulse-width modulation also gives the ability to control the solenoid at half the amperage, leaving the lockup solenoid at about half the temperature to that of DC units. Using logics to control the unit gives us the ability to run two systems in harmony, not switching one on and another off, which also stops the voltage spiking to your ECM.

A factory-style button installed for the StockLock Torque Converter

When diagnostic load-testing these kits and eliminating the slippage, we see transmission temps nearly halve. Other noticeable improvements we see are fuel economy and generally 10% extra power delivered to the wheels on our Dyno, just by removing slippage without one single engine modification.

We have been installing and testing transmission torque convertor lock-up kits for many years now and the Stocklock system is by far the most reliable when it comes to annoying transmission codes, and its operation is seamless compared to others we have tested. Correctly installed and tested, this system is second to none and the only regret we get from customers is they wish they had installed one sooner!

Below are examples of the extra power delivered to the wheels on our Dyno – standard versus lock-up kit (no other engine mods).

Still have questions? Please give us a call on (03) 5853 1555 or drop into our showroom.

Graph showing Hilux Dyno results

Graph showing Totyota LAndcruiser 200 Series Dyno results

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