[PAR Engineering]

Hi All, I have recently been directed to this topic and have read over the history.
As known, we have been supplying a gear set option.
Keep in mind 6th gear is an option and is usually replaced since its too weak or the ratio does not suit.
6th can remain OEM and hence 5th and 6th will then be quiet. This will appeal to the users that are worried about noise.
Straight cut technically known as Spur has many advantages when compared to Helical gears. Although the 1 disadvantage is the gear whine. Keep in mind the way we manufacture gears these days with our new technology our spur gears are quiet when compared. We actually have customers request they be nosier.
The few advantages of Spur cut gears include, no thrust axial loads, better tooth profiles, strength, etc. All these advantages reduce horse power loses.
Can we purchase 1st-4th only?? was a question I noticed popped up often.
The answer is Yes, 5th and 6th will retain OEM gears. The only issue with this is that if the car is a heavily launched 5th can break since all the power runs through 5th before it is transferred through the selected gear. Only when 5th is selected it is direct drive. If 5th shatters there is a chance that the tooth debris can blend through other gears. So if you don't launch the car and have not got really high power then 1st-4th may work at your risk. As the manufacturer we need to be very clear.
I will keep an eye on this forum and will happily answer any questions but can I please ask to not ask the same question twice since I don't have much time away from production.