Transmission Torque Convertor Lockup Kit

The “Stocklock” torque convertor lockup kit is the most advanced on the market, and gives you the ability to control and “lock” the torque convertor which stops it from slipping and gives you more torque to the wheels.  The Stocklock comes in a few different options, the Dual speed, the Extreme and our own DPT Low Speed Extreme.

Stocklock torque converter lock-up kit – Dual Speed

The Dual speed offers a two button system, an Auto button for normal everyday driving. This technologically advanced  lock-up kit automatically controls the transmission lock-up when you are in drive. The electronics are all set and automatically lock the torque convertor around 78 km/h. This will hold 5th gear at this speed and you will find this stops the taco constantly changing when going over slight rises and hills. If you go fast enough, it will engage, and also stay locked in 6th gear.
When slowing down, the Stocklock is programmed to unlock the torque convertor when it drops below 75 km/h, all this is fully automatic so you don’t need to do anything.

To activate the second speed, simply push the Low speed button in and select “sports mode” with your gear shifter. You must drive with the gear shifter and use every gear just like a manual gearbox. Taking off in first, select second and once you hit around 38 km/h, this will engage the lockup torque converter. You will now have lockup in each gear, from 2nd gear and all the way through to 5th and even 6th gear. This will put more power and torque to the wheels, as no power is lost through the torque converter slipping. When you are slowing down and changing the gears down as you are coming to a stop, the Stocklock will automatically unlock the torque convertor when you go below 35 km/h, this will allow the automatic to function normally and NOT stall the engine.

When going down hills, you will have engine braking just like a manual gearbox, this is a huge advantage when towing down a range.

Stocklock torque converter lock-up kit – Extreme

The Stocklock “Extreme” transmission lock-up kit is a 3 Speed lock-up and is much easier to operate as it is wired directly to the sports shifter. It has one button to turn the Stocklock on and off and works the same way as the Dual Speed. With the button turned on, the Stocklock will be automatic and engage around 78 km/h when in drive.

If you want to use the low-speed lock-up, simply move the shifter to sports mode and then you have lock-up in every gear from around 38 km/h. There is no need to push any button, it is activated by the shifter. Drive the transmission using the shifter in every gear, same as the Dual speed and when you want to stop using the low speed lockup, simply select drive and it disengages and goes back to automatic mode. This is shift-on-the-fly technology so there is no need to stop to go between modes.

To activate the 3rd speed, stop the vehicle, select LOW range, move the shifter over to sports mode and you will have lock-up from 8 km/h. Perfect for sand and bull dust etc when you need maximum low range power and torque. Again, you will have lockup in every gear.

If you don’t want the Stocklock on, simply push the button off, or move the shifter back to drive. It’s that simple.

This Extreme 3 Speed Stocklock is fantastic and easy to use.

We have done back-to-back testing on our Dyno, and when the low-speed lock-up is activated, we achieved over 25% more Torque to the wheels. We have customers reporting up to 30 degrees cooler transmission temperatures, and fuel economy improvements around 2-3 litres/100km when towing.

Here are some of the advantages for fitting a Stocklock torque converter lock-up kit:

  • Automatic on/off
  • Holds 5th & 6th gear
  • Increased engine braking
  • Factory look/style switches
  • Reduced flaring between gears
  • Lower transmission temperatures
  • Better fuel economy up to 3 Litres/100km
  • More direct drive for better use of engine torque
  • Market leading and most technologically advanced unit available

Transmission Lock-up kits are available for Toyota Land Cruiser 200 series, Toyota Prado and Toyota HiLux.

For the Ultimate transmission for Towing and Touring, click here to learn more.

If you own a 200 series Land Cruiser/ Prado or HiLux, this has got to be on the top of your list of up-grades.

Rick and the team did a fabulous job upgrading my beloved 200 series. I have always loved my vehicle but love it even more now! Rick's professionalism and vast knowledge of the 200 series instilled confidence and trust. I am now a Diesel Performance Tune addict and can't wait for my next mod!

Natalie French

I was asked to contact this business by a third party to try and resolve an issue I had with my car’s suspension. I was somewhat prepared for service that was so-so as I lived on the other side of the country and it was obvious that more than likely I would never cross their doorstep again once I had the problem looked at. That view could not have been further from the truth. Rick fitted me in to initially look at the problem and then spent an hour thoroughly diagnosing what may be the cause. He contacted two separate suppliers, arranged to have the parts delivered ASAP and again fitted me in first thing on the Monday morning to complete the job so I could be on my way. I cannot speak highly enough of this company and it’s staff and it’s approach to customer service. I would have no issue using them for any of the services that they provide and do not hesitate to recommend others to do likewise.

Rick V

When it comes to knowledge and quality workmanship you won't find any better on the GC. We originally took our ranger to these guys to fix something that had been incorrectly installed by another company and no one could correct this. From the first conversation these guys knew their stuff and were honest! And resolved my issue with one visit. We are so lucky we were referred to Diesel Performance Tune and take all our vehicles to these experts now. The staff are great to deal with and are honest good people. Anyone had enough of not getting value with who your using currently don't hesitate give these guys a call!

Jessica Sanders

Very professional outfit. I have a PK Ranger and it is hard to find centres who care about older vehicles these days. Rick, Eddie and the boys treated me like one of their high end Land Cruiser customers. I am mechanically minded and was able to really discuss my issues and findings with the vehicle which did not fall on deaf ears. Not only did they resolve my issues and breathed new life back into my old vehicle, they also repaired smaller less noticeable issues which were very inexpensive now but would have resulted in a lot more costly repairs down the track. These guys will be seeing me again 🙂 Keep up the great work.

Matthew Sonter

The diesel performance team did a great job with my hilux. I have had a reoccurring problem for years with the check engine light, limp mode and the hilux throwing codes that no mechanic was able to diagnose. The team was able to find the hidden broken wire, fix it and tune my hilux. It's been running great ever since. Would highly recommend this business.

Jessy Bloom

Rick, Eddy, and the team did a GVM upgrade on my Landcruiser 200 and were fantastic throughout the process. Thorough and very professional. Would recommend highly.

Joanne Riley

First of all I want to say a big thank you to Eddie and his team, im so impressed on the attention to detail and work they did on my 79 LandCruiser. The staff are very friendly, honest and extremely knowledgeable. Thanks again team and I look forward to getting future upgrades and work done. Regards, Dean from Apollo.

Dean T

Just picked up my turbo diesel iload, being a business owner vehicles off the road cost money, the boys did a professional job, highly informational and job completed in a couple days. Competitive price with excellent workshop and customer service, highly recommended. Thanks

Mark Ansems

What a customer service. So hard to find people willing to help. Just a phone call, I was able to get an information that saved me wasting my money and time. Thank you so much. Super happy with my experience.

Mark Uzuelli

Have just had my 2012 Land Cruiser worked on by the guys at Diesel Performance & Tune. ECU remap, transmission remap, Stocklock transmission lockup, fuel manager 2 micron post filter, catch can, carbon clean, Scan gauge & transmission service. Ray & Eddy are great guys who patiently explained everything and answered all my questions. Car runs with much more power & torque now. Very professional job. Thoroughly recommend Diesel Performance & Tune.

Colin Price

Great service, Had my 4x4 tuned and some work done. Very knowledgeable bunch. Eti was very friendly and knew what he was talking about. Thanks guys for looking after me. I'll definitely be back if I need more work done. 10/10.

David Mackow

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