What's the problem with "granny shifting?"

[ELVA164]

I just wanted to let everyone know my gearbox still works and I attribute it entirely to double clutching. When I double (de)clutch rev match, I feel like I have nitrous oxide in my veins and a gas tank for a brain.

[estoguy]

LOL...

My gear box has over 447K km on it, with the original clutch and I've never double clutched since I've owned it (from 227K). :)

[Kershaw]

No way is that the original clutch.

[Rsully70sev]

A+ thread, would read again.

[djjerme]

[Cephas]

Great thread. Didn't realize it was 4 years old lol.

Also, if you aren't double clutching and rev matching your e30 using the heel-toe method, then you are failing, especially if you're driving on the track.

[ELVA164]

Also, still wondering how I gave off a "cop/serial killer" vibe.




























...because I'm both.

[BlackbirdM3]

no, it reduces wear on your syncros.

now whether you care or not depends on your wallet or how long you intend to keep your car or current driveline

in a weaker transmission, like my girlfriend's geo metro, after enough abuse it's simply not possible to downshift into 2nd or first *without* rev-matching.

in a stronger transmission like the getrag 260 you may not notice it after a hundred or two hundred thousand miles...but whoever changes your oil (assuming you even do change your oil) will see the molybdenum (which is a whole lot more expensive than typical brass syncros).

you're right to note that not double (de)clutching risks premature wear of the pressure plate...but would you rather wear out a consumable or the internals of your extremely expensive and officially non-serviceable transmission?


your syncros are there to smoothly *up* shift. using them to down shift is senseless wear

To take this a step further, it also keeps the car settled. You can see the
people who can heel and toe a downshift and those that cant anytime you are out on a backroad, autoX or track. Those that can make the downshift seamlessly and the car doesn't' hop. Those that can't end up way slow through the corner, or spin the car.

After learning how to drive in a transmission that was so worn out that it wouldn't go into a gear without double clutching either for an upshift or downshift, it became second nature to me. I can't not do it for a downshift.

Will

[estoguy]

No way is that the original clutch.

My buddy owned the car 12 years... and I have the service records he had. It was only driven three seasons of the year. Took him that long to put 115K km on it. The only clutch related work he'd had done was the clutch master. Unless the first owner did a clutch, it's still the original.

[CoreyZ]

You know you can rev match downshift without double clutching, right? They're two different things, and it kinda sounds like you're equating the two ???

All double clutching does is match the input shaft speed with engine speed. It's only something you need to worry about in big ass commercial trucks or skipping gears when downshifting on something without or with shitty syncros AFAIK