When I shift into 2nd at a high rpm it makes a crunching noise sometimes and it does the same downshifting into 2nd.It doesn't happen in any other gear.What could this be???

2nd gear synchro.



It'll need a rebuild soon. You should change to synthetic fluid (Redline) to see if you can get any more life out of it.

thanks i'll change the fluid...how much will the rebuild cost?

If you let the RPMs fall back to near idle it'll go into 2nd just fine, but that doesn't mean that the synchros are okay.



As for rebuilds, you're looking at ~$500 or you could just buy a used one for less.

or learn how to rev match on your downshift and it shouldnt grind as bad.

Let's keep the bullshit out of this thread.

sorry...anyways its ur 2nd gear synchro thats shot.... you gotta start to match the revs like it was said

My N/A FC did that, and STILL does that.. 200,000 kms on the transmission



It had been doing it since 180,000. I switched to Redline MT90. It's still runs and drives fine.



(I have got another tranny since, though, just to give you a general idea that it can still have some life left).

Its a little late now, but mazda trannies are finicky, and intolerant of poor shifting habits. Not to mention the synchros are much slower than some newer transmissions. Dont try to jerk the shift lever too fast. If it grinds, you are trying too hard.



And just because its grinding, doesnt mean the synchro is completely shot, or it needs to be rebuilt immediately. You can drive for a very long time with worn synchros. The only real change is the engine is even less tolerant of imperfect shifting.



Bottom line: learn how to shift without grinding.

once the syncro is bad the only way to stop it from grinding

is to baby the car, you cant drive it hard and expect it not to grind

Yeah, but you have to beat the **** out of the tranny for a long time to get it to that point. I should know, Ive broken two trannies. You just have to shift slower when it gets really bad. And yes, you can drive a bad synchro hard without grinding. Its called rev matching. You have to shift slower, but it doesnt mean cant beat on the car. Just cant slam the gears like you were before(which is the whole reason the synchros went bad anyways).

I got my car with the 2nd gear grinding now and then, its been like that

ever since, same clutch and everything all these years later.



if you buy the car and its fucked then its too late, he just got the

car a few months ago, I dont know if even he could **** it up that

fast?



shifting slow and rev matching is not my idea of driving a car hard, I call

that going easy on the car.

Didn't you see the picture he posted of himself drifting?



It's a TII, he's a teenager. Of course he's gonna rip on it..



Just fair warning Aaron - Take it easy on her.. 15+ year old car..

it probably wasnt him drifting

oh oh oh WHAT PIC"!?!?!!

It's floating around.. You saw..

https://www.nopistons.com/forums/pub...DIR#>/ohmy.png I wish it would be like this without UniqueTII having to say something https://www.nopistons.com/forums/pub...R#>/mellow.png

UniqueTII was helping you.

What part of F&F is that from? I dont remember it...

Hahahhaahah oh that's so jokes. https://www.nopistons.com/forums/pub...IR#>/smile.png

****



Now the mad scientist and I have to rip apart the block and replace the piston rings you fried.*

did you even read my post?

Yes I did and it sounds liek ur synchro is out.