I'm pretty smart, "Normal"

 

You're right about 5th being straight cut. First is also straight cut, due to the gear being stronger. There is zero side load with a straight cut gear, which contributes to less wear as well as less chance of breaking, less heat, and less power loss. The other gears are helical cut due to EPA noise testing. The EPA test varies by state, however it's measured by second, third, fourth, or top gear. Since fifth isn't the top gear anymore, it isn't subjected to noise testing.

 

Dumb straight I is a smart tear dan day average bare is I turn the radio up is how much of a smartass is you think I am?

 

I'm dumber than a bucket.

 

I noticed the whine immediately when we bought our 08 SG. I switched to Gear Savor oil and after the second oil change I do not notice it nearly as much and the CLUNK when you shift gears is not as bad.

 

I run 75/140 mobile 1 in the tranny, shifts smoother, klunks, and whines less. It also seems to get guieter with more miles.

 

turn the radio up.

 

Helps you to remember that you are in 5th....

 

I gotta agree with Russ on this one. I have an indicator light for 6th gear and I have an indicator whine for 5th gear. I kinda like it...........................

Dennis

 

From what I understand, 5th gear is straight cut so MoCo can fit all six gears in the gearbox. Bevel cut cogs are thicker than straight cut cogs, a strength issue I guess.