[mqin]

I've done some searching before deciding to make a thread although there were a similar thread, it did not answer the question I wanted to ask.

Anyways the question is: What are some of the pros and cons of slip shifting? Like how does it impact your car if it is done correctly or incorrectly (the transmission/clutch/etc...)?

Slip shifting - Shifting without the use of the clutch.

Reason I'm asking is because I saw one of my friends drive the whole day without using his clutch to shift up or down. Other than to get his car rolling from a standstill, and that made me recall a incident a couple of years back where the master cylinder had a leak and caused the hydraulics for the clutch to stop working. Anyways in the end one of my friends who is also my trusted mechanic somehow not only got my car out of my inclined drive way but also from Burnaby to his shop in North Van without the use of a clutch which I've always thought was very impressive.

I understand that the gear will just pop right out if you're at the right rpm, and with your foot off the accelerator, plus downshifting is pretty much the same thing but you just rev as you would normally with a clutch to the correct rpm and then popping it into a lower gear. I just gave it a shot on my drive home earlier, and it didn't seem all that hard, nor was there any grinding/unpleasant jerk of the car.

Thanks for any replies!

[E-40six]

I drive trucks for a living and spend between 4-12hrs a day in them and I usually don't need to step on the clutch to shift,

Pros - easier on your left leg and you won't tire as fast

Cons - you'll be grinding some gears if you don't time it right

[fliptuner]

Same here. Granted, it's easier to do on a 1T+ truck.

The obvious pro is: little/no clutch use = little/no clutch wear

If you can do it proficiently, without grinding the gears and still shift fast enough, go for it.

[predom]

Learn it for emergencies, but use your clutch, your tranny will thank you.
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[lowside67]

Yup... you can shift without a clutch and save your clutch, at the expense of your transmission synchros. Even if you are very good at it, it's not perfect. The clutch is designed to be a wear item, a clutch is like $600 in a lot of cars while rebuilding a transmission would likely be 4 times that... financially it's not a smart move.

Mark

[duy-]

like everyone else said, good to know how to do it, save it for only emergency situations. clutches are meant to be used, just like brake pads, would you aggressively gear down in an attempt to save pad life?
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[Splinter]

It impresses people who don't know how to do it.

[dared3vil0]

Wait. How do you start without a clutch...? One could only assume the second you put it in gear it would stall...

[a00755836]

i just call it clutchless shifting. i read this article a year ago.

How to: Drive a Stick Without a Clutch - Car and Driver (http://www.caranddriver.com/features/how-to-drive-a-stick-without-a-clutch)

[mqin]

Wait. How do you start without a clutch...? One could only assume the second you put it in gear it would stall...

I believe you turn the engine off, then put the gear into first or second, and gas it as you start the car (foot has to be off the brake) and it'll jump quite violently to begin with but your car will get rolling and it will prevent you from stalling.

[Marco911]

It's great. I do it all the time - on rental cars.

[falcon]

Just use the clutch, why is this really a question? Unless you're super lazy and moving your left leg tires you.

People complain about cars not having manual transmissions as options anymore, then you get other people trying to drive them without using the clutch...

[jlenko]

It's great. I do it all the time - on rental cars.

I haven't been able to find many places that rent manuals :(

[jing]

Granny shifting, not double clutching like you should
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[death_blossom]

Granny shifting, not double clutching like you should
Posted via RS Mobile

lol.

I never tried it myself, but what for? as mentioned, the severe wear on the synchros isn't worth it.

[LemonT]

As lowside67 had said, you trade the pad material on the clutch at the cost of your synchros as well potential for grinding gears when you mismatch the rpm points.

Something good to know for situations like you have mentioned but it's not advised.

and for a video reference

How to shift without the clutch (clutchless shifting) - YouTube

[Splinter]

Just use the clutch, why is this really a question?

For anyone who drives OLD manual cars, it's a useful skill to have. You never know when you're going to snap a clutch cable or lose clutch hydraulics.

But once you've learned it, there's no reason to keep punishing your car in ordinary driving.

[bloodmack]

my freind did it on his b3000 for a month just cause. its still works great a year later.

[jimmyrustler]

http://edc13.education.ed.ac.uk/amyw/files/2013/02/276253_Papel-de-Parede-Meme-Jackie-Chan_1600x900.jpg

[falcon]

For anyone who drives OLD manual cars, it's a useful skill to have. You never know when you're going to snap a clutch cable or lose clutch hydraulics.

But once you've learned it, there's no reason to keep punishing your car in ordinary driving.


Or just maintain your car properly. I can shift without a clutch just fine, doesn't mean I'll do it. I'd rather replace a clutch than a transmission.

[ancient_510]

Yup... you can shift without a clutch and save your clutch, at the expense of your transmission synchros.

... And what about non synchromesh transmissions?

[?uestlove]

if you know how to do it properly, you won't wear out your synchros. it's all in the timing, if you know how many rpms to drop/raise in between gears it's easy. semi trucks don't have synchros, and they are shifted without stepping on the clutch. but semi trucks are usually 200rpm between gears so it's easier to judge when to shift.

if you're killing sychros doing this, you're doing it wrong.

[Detox89]

Thought i would give my 2 cents on this... It is ultimately the fastest way of shifting a car but it is very hard on your clutch (especially the down shifting) i do not recomend it for city or track driving.
The only reason i used it was for racing in the F2000 and the formula pacific race series were it was the only way to shift. Hope my input helped :D

[dared3vil0]

Thought i would give my 2 cents on this... It is ultimately the fastest way of shifting a car but it is very hard on your clutch (especially the down shifting) i do not recomend it for city or track driving.
The only reason i used it was for racing in the F2000 and the formula pacific race series were it was the only way to shift. Hope my input helped :D

You have no idea how dumb you sound- Shifting WITHOUT a clutch is HARD on the CLUTCH?! And it's the fasest way to shift? So tell me again how being forced to wait for the revs to match is faster than using a clutch? :fulloffuck:

[Detox89]

You have no idea how dumb you sound- Shifting WITHOUT a clutch is HARD on the CLUTCH?! And it's the fasest way to shift? So tell me again how being forced to wait for the revs to match is faster than using a clutch? :fulloffuck:

i dont really know where to start....but i have been racing cars since i was 11 and every formula team i have been on makes me do this.
I will be the first to admit i am not great with the technical aspect of cars but the people i drove for and the mechanics on them are and this is what they tell me i just thought i could tell him what i learned while racing.

[fliptuner]

If one chooses to revmatch and shift without using the clutch, it won't wear out the clutch cause it will always be engaged and never slip. Also, if done correctly, it won't wear out the syncros cause the main and counter-shaft will be spinning at the same speed.

It is, however, slower to shift without a clutch, if you're just daily driving with a syncronized transmission.

In a HD truck with a non syncronized tranny, it's easier and faster to shift by revmatching, since you don't double clutch and pedal pressure is usually hard as fuck.

In a race application, sure, ripping through gears with total disregard for the syncros, is probably going to be faster but you'll go through trannies like a mofo.

I suspect Detox89 was referring to wearing out syncros, not the clutch.

[Detox89]

^ yes thank you sorry bad with the whole mechanics of things lol the crews would always get pissed :S

[Splinter]

Or just maintain your car properly. I can shift without a clutch just fine, doesn't mean I'll do it. I'd rather replace a clutch than a transmission.

Live a little.

[jing]

Thought i would give my 2 cents on this... It is ultimately the fastest way of shifting a car but it is very hard on your clutch (especially the down shifting) i do not recomend it for city or track driving.
The only reason i used it was for racing in the F2000 and the formula pacific race series were it was the only way to shift. Hope my input helped :D

I was going to call bs on you racing open wheel until I remembered who I think you are :troll:

[Timpo]

As lowside67 had said, you trade the pad material on the clutch at the cost of your synchros as well potential for grinding gears when you mismatch the rpm points.

Something good to know for situations like you have mentioned but it's not advised.

and for a video reference

How to shift without the clutch (clutchless shifting) - YouTube (http://www.youtube.com/watch?v=jLw0hAtOik4)
WTF is this?

solution:
-just use your clutch
-buy an auto

[Timpo]

even Ayrton Senna used his clutch

Ayrton Senna NSX R - Full Onboard - YouTube

[Shorn]

i was forced to do it before when the master cylinder went on my old prelude

good times..

[duy-]

you're basically matching the revs and slamming it in gear, take the same principles but instead... step on the clutch. i think you'll find that its a lot smoother at the right revs and you use very little material regardless, its really the 1st gear moving from a dead stop that wears out the clutch... otherwise you're shifting incorrectly either letting the clutch out too slow or too quick

[ncrx]

if u buy a dogbox you can shift without your clutch all day long, except its probably going to cost more than your car to buy the gearset.

[entrax]

it's definitely come in handy to KNOW how to clutchless shift. i've had my clutch slave cylinder and the hard pipe that goes into it at separate times in the past 2 years. i didn't know about clutchless shifting when the cylinder went, but i was able to drive my car to the shop after i learned about clutchless shifting when the piping went.

for most cars, there's a clutch switch right above the pedal that allows you to start the car. for my old celica, the switch is easily accessible by driving barefoot and your big toe just fits perfectly for the switch. at every stop light, coast to stop/turn off car, then go in gear+start car while holding down switch to start moving, then clutchless shift to get up to speed.

despite knowing it, i would never do it in regular driving.

[Indyjones]

Just use your clutch. :toot: If you use it properly, it lasts a long time. Better than risking a damaged tranny.