gc, if you search around I think you'll find fairly definitive studies that show an impact wrench to be "easier" on most components for removal than a breaker bar/socket combo. There are obviously always some exceptions to any generalization, but it's pretty much impact over breaker bar for most situations. A difiicult fastener will come off with fast, multiple impacts a little more safely and easier than with a steady force from a breaker bar setup. Also the breaker bar setup is often not applying force in a perfect alignment with the axis upon which the fastener is attached. A transmission is a pretty tough design because of the normal hostile environment in which it operates. I don't think our KLX tranny is being challenged much by the breaker bar or impact tool application in this case.

I think in most cases, people get into trouble with air impact wrenches during installation of fasteners...too much torque applied too long.

 

Whew thanks for the advice guys you really boosted my self esteem lol. I was beginning to think all these years I thought I was good at fixing stuff was just a huge lie. I thought a cheap pot metal nut like this would come off easier. I'll try air impact once I find one I can use lol. At this point I might have to grind her off because the nut has taken a real beating.

 

Oh and I will definitely use antiseize. I've had so many problems with bolts on bikes I've been starting to use it all the time. Only problem is this silver anitseize stuff my dad has in the garage gets everywhere and is a real female dog to clean up

 

Well it's a moot point for me now anyway as I no longer even own a KLX, but you might be right.*
I sleep better not using impact wrenches on hardened steel components like those found in a transmission. Although I acknowledge that impact sockets themselves are hardened.
I am not a mechanic, I just apply the logic I learned in Geology 101: Hardened minerals resist wear but are brittle, while softer materials resist impact better due to their ductility...

 

$25 harbor freight plug in impact wrench did the job..

 

the nut on mine needed to be removed with a serious air-impact wrench, the harbor freight electric one didn't do anything. even with the air-impact, it took more than 10 seconds of pressure before it popped. good luck buddy!

 

I used $200 something dewalt electric impact came right off
but maybe I was using the correct socket when doing it
sometimes a trick is to tighten slightly, then reverse
dont know why but it works alot on tight parts

or heat with a little torch carefully if it has any threadlock on it then impact it out

 

DO NOT USE HEAT!!! Unless you want to ruin the seals. In order to use enough heat on this nut you would definitely ruin the seal and perhaps more.

 

Dang! And I thought breathing on it was what finally loosened mine up...

 

Dont use the brake... just put a long extension or breaker bar through the sprocket and wheel so the bar stops the wheel against the swing arm.