MMT6 Gearbox Rebuild Policy and FAQ.
Does the MMT6 Service from Mountune LLC (USA) include a warranty or guarantee?
In general and because we cannot control the environment the part or assembly is used in, Mountune competition and/or performance parts carry no warranty including MMT6 Gearbox rebuilds and service. Mountune LLC shall not be liable for direct, indirect, incidental or consequential damage or injury to persons or property that might be claimed as result from the installation or improper installation and failure of part, including claims for delay, loss of profits or labor. There are no warranties expressed or implied.
What happens if you find damaged or worn parts that are not included or replaced in the normal MMT6 Service?
We inspect all gears, synchros, shift forks, bearings and shafts during the rebuild process. If any parts are found to be worn or damaged and not serviceable, we will contact you and provide a quote to replace the parts. We will not reassemble a gearbox with worn parts that may cause the gearbox not to function correctly. If you decide not to continue with the rebuild process, you will be refunded the original invoice amount less a $500.00 shipping and crating fee and $200.00 inspection fee.
Additionally, if your vehicle is at our facility and you elect not to continue with the MMT6 Gearbox service once the gearbox has been removed from the vehicle, the labor charge for removing the gearbox ($1000.00) is not refundable.
In the case that your MMT6 gearbox is not serviceable, we do offer all new gearboxes with many of the same features included in the MMT6 gearbox service. Please check our website for prices and details.
Is there a break in procedure for the rebuild and serviced gearbox?
Yes.
· Use proper GL4 or similar shockproof gear oil.
· Minimum 20 minutes of running time to warm up the gear oil
· No flat foot shifting
· Avoid rapid gear changes
· Make sure you are using a dual mass flywheel or clutch with a sprung hub
· Avoid high rpm drag race style launches and starts
· Make sure you know how to correctly operate a manual transmission
Is my gearbox stronger than the original gearbox after servicing by Mountune?
No, your gearbox is not stronger than the original gearbox after servicing. We do not replace the original gears or any other primary component and therefore would have the same rating as the original gearbox. The upgraded synchros offer improved shifting and longer life than the original components but can still fail when subjected to poor driving habits and abuse.
Excellent Upgrade! 
