Does anyone eles notice a High almost winey noise when downshifting in us lancers. I was crussin' about 40 or so and had to come to a quick stop so I down shifted from 4th to 2nd and applied the brake and the engine made fahqd up noise. Let me know whats up.

 

Sounds like you downshifted into VERY high RPM's. Good way to cause problems. ...Like the RSX-S who downshifted from 6th to 2nd and would have been at a probable 26,000rpms before his tranny exploded.

Oh, on a side note I used to get a friction sound from the flywheel/clutch face when I downshifted sometimes, but I think it was fairly normal.

 

^^^ Like he said. If your car isn't messed up already, make sure you hit 3rd inbetween there next time. Going 40 and shifting from 4th to 2nd shouldn't be too harsh for the tranny or engine. I think I've gotten up to mid 30s in 2nd.

 

Or just brake in neutral for a sec once you come out of fourth. Obviously you weren't doing rpm's the engine wasn't capable of producing, but that's a lot of friction for a downshift. That's probably a bigger RPM change than most people have when they launch their Lancers.

 

mid 30's i'll be pulling 60 in second gear and still not be hitting my redline

I used to downshift when coming to a halt, but after a while, I realized that it was too much work. Pop her in neutral and coast to a halt with the brake. You'll save your clutch, throw out bearing, and some energy doing it that way, plus your ride will feel smoother since you're not lurching with each downshift.

also, jumping a gear like that isn't a good idea, not destructive, but not the best of ideas either.

 

Wait. 40 MPH in 4th then shifting to 2nd. That would be like 2.2K RPM up to about 4.5K RPM. . . right? That's not so bad. Now if he was doing closer to 60MPH and dropped into 2nd he would have gone up to about 6K RPM and probably have done some damage.

But, yeah it's probably not great for the internals.

 

Yeah I have mentioned the whining a couple of times on here. It was the few times I was shifting to 2nd from 4th for a right hand turn. I am guessing it's the syncro having trouble with how quickly you let the clutch out. As suggested above, try shifting to 3rd in between, or at the least letting the clutch out slower, which will make a slower rpm change. I actually started taking those right hand turns in 3rd (I love getting on the freeway from my house taking the right hand turn at like 40 or more )

 

u need to match up the rpm while the cars in N. so i guess heel and toe? break, clutch in, shift into N, clutch out, gas, clutch in, shift to 2nd, clutch out. ....something like this i guess?

 

that makes me wonder....how good are the stock pedals for heel/toe? not all pedals are set up for that technique

 

i can do 60 in 2nd also... but im close to redline lol

i never downshifted when i would come to a stop...just put my truck in neutral and apply the brakes..once stopped put it in 1st when i had to go again.

yeah...double clutching would be good if u were trying to speed up/race but if ur slowing down u should just put it in N and coast to the stop

 

Double clutching is a waste of time in car with synchronized gearing. You're just spending extra time without the clutch engaged. Let the synchro do the work for you. That's what it's there for.

Brian, ToFast and engineerboy, yeah it's not a ridiculous amount of RPM's like the RSX, but I was just trying to illustrate what was possible.

I think the issue is the change of RPM's on the stock clutch. Mine would whine similarly on higher 3rd gear --> 2nd shifts and 4th to 2nd shifts constantly (around the same speed), but my clutch wasn't terribly damaged when I had it replaced (and this was after 3 mos of running about 5lbs of boost as well). The whining friction sound didn't happen every time though. I think it may have been the clutch polishing or something just because of the circumstances and the nature of the sound. If yours sounds anything like mine did you may be encountering the same situation.

BTW, I'm moving this to drivetrain tech since it has less to do with the engine and more with the clutch.

 

Why would you downshift from sixth to second?

 

I was using some trial and error out on the road lastnight not tryin' to break anything but it seems like you were right just the gear can't take the RPM's when downshifting to break. But when I went out on the highway and droped a gear to pass someone I didn't hear a thing accept the nice deep noise from the intake and stuff.

 

He missed the gate badly. It was someone on an RSX forum. Beats me.

 

I guess RSX people aren't the smartest in the world... but we already knew that.