A question for all you experienced stick drivers out there!
 

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!

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

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.

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

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

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

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

How to: Drive a Stick Without a Clutch - Car and Driver

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.

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

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...

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

Granny shifting, not double clutching like you should
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lol.

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

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

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.

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

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.

... And what about non synchromesh transmissions?

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.

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:

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.