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What is actually happening when you crunch a gear in a manual transmission ??

Desop

Member
May 16, 2000
34
0
0
hi there....

I'm sure many of you are familiar with the crunch im referring to when you make a mistake when changing gears in a manual, its a terrible noise when it happens...


Do any car heads here know what causes this crunching, what is actually going on inside the transmission when this occurs and what the long term effects of this are ?

thanx for and info
 

RambleOn

Senior member
Sep 15, 2001
441
1
0
I'd imagine it's the sound of the gears clashing together due to a failing synchromesh, or plain improper gear shifting. Do it too often and you'll end up with broken gear teeth.
 

N8Magic

Lifer
Dec 12, 2000
11,624
1
71


<< I'd imagine it's the sound of the gears clashing together due to a failing synchromesh, or plain improper gear shifting. Do it too often and you'll end up with broken gear teeth. >>



Ding ding!

We have a winner! :)
 

911paramedic

Diamond Member
Jan 7, 2002
9,450
0
76
It is what was said above, and is commonly reffered to as "polishing the gears" LOL

What is funny is when you help a friend work on their transmission and you remove the plug to drain it and you say "damn, this bolt has an afro!". I don't know if it is still the case, but the bolts used to be magnatized to help hold onto any shavings that ended up in the oil. When you removed it all the debris would stand on end and give it a 'fro.
 

jonnyGURU

Moderator <BR> Power Supplies
Moderator
Oct 30, 1999
11,778
63
91
Yep. And after enough times, you have to replace the synchonizers. This is why there is a 4 speed in my VW Rabbit and not a 5 speed. Because the jack ass who had the car before didn't know how to drive and all but ground up the 2nd and 3rd synchro rings. :(
 

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