Frequently Asked Questions
General Clutch Kit FAQ’s
Generally, the components used in our box are manufactured by major clutch companies which supply the O.E (original equipment) market (Exedy,LUK,Valeo,Sachs). This ensures we start off the modification process with premium materials intentionally designed for the vehicle.
Using our fully equipped modern CNC machine shop the standard O.E clutch is modified to achieve the most clamp load possible to release within the parameters of factory pedal travel. We push the limits of the factory pedal travel to achieve the most clamp load possible. Clutch pedal adjustment on the master cylinder push rod in most cases is required.
When modifying the factory style clutch just isn’t enough to cope with the power and torque produced, so we manufacture a flywheel to accept a clutch already designed by an OE clutch manufacturer to suit the power and torque we are tasked to transmit.
Our in-house CNC machine shop manufactures our own range of billet steel flywheels which complement the modified O.E clutch.
Our twin plate range is assembled to order in-house using only the world’s best componentry to compliment the in-house CNC machined parts.
Yes this is normal when using some of our clutch & flywheel packages. With some clutch pedal adjustment fine tuning you can get this in a suitable position.
It is important with any adjustments made to get under the car and confirm that the clutch fork can be pushed back to compress the slave cylinder. If so, then you have hydraulic clearance, and this is OK. If the slave cylinder cannot be compressed then the system is holding constant pressure against the clutch and will need to be backed off at the clutch pedal to correct it.
Typically a squealing / squeaking noise that is apparent when your foot is off the clutch pedal but goes away when pressure is applied is a sign of a dry pivot & fork.
When the pivot & fork are lacking lubrication it can resemble and is quite commonly mistaken for a bearing noise. A release bearing will usually become noisy when applying pressure to operate the clutch.
The life expectancy of a clutch is determined by many different factors.
e.g – What the vehicle is used for, Quality of installation, and the biggest factor being the driver in control.
When experiencing clutch slip you may notice that the RPM is climbing while not gaining the usual vehicle momentum. You will feel poor acceleration and it may sound like the engine is labouring.
There can be many causes behind clutch shudder ranging from worn driveline mounts, extreme heat through the clutch components & contaminated friction materials. Contamination on the friction material can come from either an oil leak or even lack of preparation during the installation process. In some cases extreme heat through the clutch components plays a role. This can be caused by clutch slip or excessive riding of the clutch.
If the clutch was not purchased directly from NPC, the first step is to contact the store where you bought it. If they determine there may be a manufacturing issue, the store can then submit the clutch to us for further examination. We will work with the store to resolve the issue.
In the case that you have bought the clutch directly from us, please head to our Warranty Claim page and complete the form, attaching all relevant installation invoices, photos & documentation. We will investigate the claim and work with you to determine a resolution.
FAQ's - Landcruiser’s
The spring washer goes to the top, then the two flat washers underneath. (we may need a photo of this)
When installing an aftermarket heavy duty clutch, there is a noise than can occur that is noticeable when operating the clutch above 1700rpm. This noise is not causing any damage, it is simply something that can occur in some vehicle when going away from the factory genuine clutch. Not all vehicles will make this noise, and the vehicles that do can vary in how loud or quiet they are.
Yes this is normal when using some of our clutch & flywheel packages. With some clutch pedal adjustment fine tuning you can get this in a suitable position. It is important with any adjustments made to get under the car and confirm that the clutch fork can be pushed back to compress the slave cylinder. If so, then you have hydraulic clearance, and this is OK. If the slave cylinder can not be compressed then the system is holding constant pressure against the clutch and will need to be backed off at the clutch pedal to correct it.
Typically a squealing / squeaking noise that is apparent when your foot is off the clutch pedal but goes away when pressure is applied is a sign of a dry pivot & fork. When the pivot & fork are lacking lubrication it can resemble and is quite commonly mistaken for a bearing noise. A release bearing will usually become noisy when applying pressure to operate the clutch.
FAQ's - Patrol TD42
We recommend using the hydraulic combination of GU master cylinder & GQ slave cylinder to achieve correct clutch operation GU master cyl part # JB9575 – 11/16” bore size GQ slave cyl part #JB4198 – ¾” bore size.
If you have a bad squealing noise that gets worse when applying pressure there is a good chance that the release bearing has been fitted to the carrier backwards. This will cause damage to the bearing and pressure plate as the bearing is not rotating due to incorrect installation.
FAQ's - Solid Flywheel Conversions
In some vehicles when converting from a dual mass flywheel to a solid one-piece conventional style flywheel you may experience some extra driveline harmonics. This is because we have gone away from the factory dual mass flywheel that has a sprung and hydraulically dampened centre that absorbs harmonics and vibrations between the engine and gearbox.
When converting from dual mass to solid style flywheel we need to absorb the harmonics through the clutch plate centre and in most cases this possible. Some vehicles may get excessive driveline harmonics and unfortunately in those vehicles the only way to correct that is to go back to a factory style dual mass flywheel and factory clutch.
For the majority, a solid conversion flywheel with aftermarket clutch is acceptable and in vehicles that are used offroad or for towing the solid conversion package is a better option.
Got a Question?
Don’t hesitate to contact our friendly team either through our website, or call us on 07 3420 3446.
FAQ's - Returns & Warranty
- Products and packing must be in re-saleable condition. Products must not have been used or attempted to have been used. Any evidence that the product has been used will result in the return being rejected;
- Freight must be prepaid;
- A copy of the NPC invoice or invoice number must accompany the returned goods;
- A reason for the return of products must be indicated at the time of return;
- Any products specially procured or sourced may not be returned for credit and will incur freight return costs;
- All specially manufactured and/or modified goods may not be accepted for credit returns;
- Returns accepted after 30 days, may incur a 10% handling fee;
- Returns will not be accepted after 90 days unless by prior arrangement;
To find out which clutch would be right for you, use our search bar to find your vehicle & view the options available.
For Quality Clutches Contact Us Today!
For general enquiries and information, give us a call on 07 3420 3446 and our friendly staff will be happy to help!