Rep Power: 273

Hey Guys:

I was doing some research about the synchros in our manual trannies and from a few sources, they are basically the only weak point in our drivetrain, especially if (like a lot of us) we drive a bit too hard, or drive stick incorrectly.

I myself have been guilty of allowing the synchros to do all the work lately, esp. when downshifting, but no more! I now understadn why every used civic I have tried has been weird when trying to shift, almost like it wouldn't go into gear.

Double clutching for all... or at least blip the RPMS to where they are going to be before you downshift...

http://mydreams.go.ro/art_double_clutching.html

 
Rep Power: 0

So...what?

You don't have to double-clutch in our cars...

 
Rep Power: 333

its fun to try something new. but i have auto =(

 
Rep Power: 275

sell it

 
Rep Power: 0

how come we dont need to double clutch???

 
Rep Power: 0

You don't have to do it because of the syncros. Double clutching is for newbs, heel and toe is how people do it now. Double clutching takes too long while heel and toe can be done it basically one fluid motion. But no one really needs to do either.

 
Rep Power: 318

^if you are doing any kind of roadcourse type racing, then heel toe is essential.

 
Rep Power: 0

ye ye ye ..

 
Rep Power: 342

Do you even know what your talking about???

Heel toe'ing allows you to clutch, brake and blip the throttle to rev-match all at the same time.

Double clutching does not accomplish this.

 
Rep Power: 273

Good point, although the way the stock pedals are in my ride, it's pretty hard to heel-toe. I think if I changed the brake height then I'd be OK.

to the "So-What" guy, the point is that you can make your tranny shift easier and last longer by not wearing on the synchros that much. Heel-toeing is the same thing only in one motion and a bit harder IMHO than D-C'ing because you have to mess with the pedal height (at least on mine, with my size 10.5 feet).

I dont' undersand why people (Aznthug) are flaming me, I just wanted to get the info out. I KNOW that heel-toe is more advanced and better, but i don't have any desire or time to mess with my pedal heights right now.

 
Rep Power: 294

I'm lost on this subject. Anyways, I don't think I'll treat my tranny in any way that would hurt it somehow.

 
Rep Power: 338

for those that dont blip the throttle to down shift, and just drop the clutch, bad.... I mean... hmm.... if blipping the throttle or heel toe is not your thing, just step on the break pedal a little more. A break job costs a lot less than a clutch job, or rebuild tranny.

Besides.... a lot of ppl still dont know what heel toe is..... and there are even less ppl that can do it properly.

 
Rep Power: 0

im replacing the synchros in my tranny with metal ones cuz mine were bad when i replaced the tranny i guess the ****stick that owned the car that the motor came out of cant drive worth crap

 
Rep Power: 273

Uhh... I thought ALL synchros were metal, just different kinds.. do you mean you are replacing the synchros with a different metal or with aftermarkets? What kind?

 
Rep Power: 294

I hope they were not made out of plastic...je je...the stick that owned the motor what?? Eh??

I'm sorry, I don't get it...

 
Rep Power: 285

My one friend thinks that Double Clutching makes your car go SOOOOOO much faster ever since "THE MOVIE".

 
Rep Power: 328

Double clutching has zero effect on a syncronized trasmission other than to wear the clutch out some more. If you have syncros they get used whenever you shift, regardless of how you engage the clutch.

 
Rep Power: 0

double clutching is supposed to be done simultaneously with heel-toe, and both are used to select the correct gear for exiting a turn. double clutching has nothing to do with going straight, like the way the represent it in fast and the fagg0ty. and just like everyone has said you don´t need to double clutch when you have synchros. however heel-toe is still important when you downshift during a turn as it allows you to brake and downshift simultaneously and smoothly, this prevents spinouts when you are racing, and allows for smoothness in daily driving. If you are a master at driving and manage to double clutch in an automatic transmission, then you should tryout to be an f1 driver for ferrari and take schumachers place.

 
Rep Power: 266

um, just to mention, my '01 EX had the tranny go to sh*t at 30k miles. the worst part was from 1st to 2nd, the stick would actually pop back into neutral when i let the clutch out (with a big grinding sound to make me look cool). i drive hard, so i thought it was my fault mostly, but the dealer said this problem had a 'service bulletin' out for it. this means it happened to a lot of these 5-speeds. they already had a full list of the parts and rebuild they needed to do. if your car is one of the ones that gets screwed up like this, i hope you get it under warranty like i did. it would have been over $2000 had i paid for the repair. they replaced the tranny case, 1st, 2nd, and 5th gearsets, 2 of the shift forks (1st-2nd, reverse), maybe some more. the dealer said that it would have gone out eventually no matter how i drove it.

since then (about 7k miles) it's been fine...my fingers are crossed though, as my warranty's out now.

 
Rep Power: 0

guys...

some misunderstanding here...

ok..heel toe is mostly for BRAKING + DOWNSHIFTING...

BUT

double clutch is used for downshifting... lets say in daily driving, usually you shift @ 3000 RPM and thats no where near redline....some idiot was on your tail and you simply wanna get him lost....so you clutch, blip throttle, down shift, and GO... I don't think you would need braking in this thus heel toe is not neccesary in this situation...

 
Rep Power: 300

**confused**

I thought that "double clutching" was mainly a pratice used by truckers who are driving semi's. I wasn't and still am not aware that double clutching is needed for civic's or just about any car thats on the road for that matter.

 
Rep Power: 0

To me, it seems like I have always done this heel toe/double cluthing technique all along... I did not know I was doing it... just seems like common sense when you learn how an engine and clutch work.

 
Rep Power: 266

re: 'truckers only' comment (ffokuf) - i know other drivers who swear by double clutching, most notably a friend who drives a 325i.

 
Rep Power: 0

welcome to the site Varmin

 
Rep Power: 266

i've been lurking for a while now. cleared my headlights a couple weeks ago, thanks to the DIY. just thought i'd join in.

now if i only had $$ for parts.

 
Rep Power: 273

They get used, yes, but the point is, if you are going 50, and wanna downshift to 2nd gear, if you don't D-c and rev match while downshifting, the synchros have to work that much harder to get the shafts turning at the same speed - this happens before you even let the clutch out and the engine revs go nuts. the point of the synchro is that even if the clutch is IN, they are still doing work.

Rev matching and double clutching does make a big difference in the life of a tranny.

 
Rep Power: 328

Double clutching doesnt, but rev matching does.

 
Rep Power: 380

You just described a Rev-matched down shift, not Double clutching....

Double clutching = Clutch in, Drop to nutural, Clutch out, Blip Gas(if you are down shifting), Clutch in Shift to next gear, Clutch out.

Double Clutch shifting Is not just for down shifts... you can double clutch while up shifting too, though it is much slower then normal shifting.

Traditionally Double clutching is use on cars that have Bad syncros or No syncors, because you are doing manually what the syncros do automatically for you normally. SO, if you have good working syncros then you are wasting your time double clutching, if you've blown your syncors or happen to be driving a Very old Truck or other car with No syncros then Have at it.

 
Rep Power: 583

doulbe clutching is the coolest! i do it all the time, even when i drove my automatic. every time i felt the car about to shift id pop it into neutral and then back into drive again...i smoked everyone on the sidewalk.

why dont people learn?

you dont need to double clutch in a civic, or any other modern car for that matter. the synchros are there for a reason, and we dont have that much HP to begin with where we would need to double clutch. so just return your copy of fast and the furious to blockbuster and rejoin the real world.

 
Rep Power: 273

Apparently I was misinformed. I guess all I need to do is rev - match on the downshift.