View Single Post
Old 01-25-2017, 02:06 PM   #11
GrimmSpeed
 
GrimmSpeed's Avatar
 
Join Date: Nov 2011
Drives: '13 BRZ, '12 WRX
Location: Minneapolis, MN
Posts: 1,676
Thanks: 271
Thanked 3,552 Times in 886 Posts
Mentioned: 218 Post(s)
Tagged: 4 Thread(s)
Send a message via AIM to GrimmSpeed Send a message via MSN to GrimmSpeed
Quote:
Originally Posted by Ultramaroon View Post
Let's discuss the physics at play, are there any not-so-obvious physics about a shift knob that have an effect on the physics at play inside the transmission?

Would these physics be good for the transmission?
If you were to add a weighted shiftknob that was so substantial (something close to the weight of your hand and arm) over time you would start to have a force that would be constant pushing the shift forks into the synchros. Exactly like why you shouldnt rest your hand on your shifter while you drive, or keep your clutch pressed in when you're at a stop light. You're doing extremely small amounts of wear, but for very very long periods of time.

But that would be a ridiculously heavy shift knob, something in the range of 10lbs. Whereas a heavy weight shift knob is around 1-1.25lbs. So the forces are significantly lower than the situation where you're resting your hand on the shift knob constantly while driving.

So in short, any additional wear would be negligible from weight alone. And as far as increased wear from shifting into gear very aggressively? You can expect that to be the same. it's a very short momentary force, and pretty much unnecessary, especially with a weighted knob. So again, no negligible difference or damage to the transmission as a result.

Chase
Engineering
GrimmSpeed is offline   Reply With Quote
The Following 2 Users Say Thank You to GrimmSpeed For This Useful Post:
jcw99 (02-04-2017), Ultramaroon (01-25-2017)