[crashsti]

was reading one of the import mags and i came across something called "dog gears". i think it was in SCC. well, for only $6500 you to can get the strength of straight cut gears and the added performance of clutchless shifting. anyone else read this? i can't remember the Co. that sells them, but it did say they're available for the STI.

[salisburyv]

power shifting....i can do it occaisonally....but mot often cause if you miss....ouch

[bitabur]

its also REALLY bad on your synchros.

[Slowride]

Yeah, a dog box would be cool. I'd want to drive one before plunking down several thou, though.

[Depeche]

i just have to clairify that there is a difference between power shifting and shifting without the clutch

power shifting is when you don't lift off the gas pedal when you shift gears and it is hard on just about everything. typically only do this for drag racing when you are slamming the gears.

clutchless shifting is when you match rpms to let the gear out and then revmatch to get back into the next gear. If done PROPERLY it won't put any excess wear on anything. I stress properly because if not done right it will wear the syncros and you could bang up the engagement teeth.

I can clutchless shift just about any manual car i can get behind the wheel of, so i speak from experience.

*sequential trannys also can clutchless shift but thats a whole nother can of worms.

[capaSTi]

found it - i saw the same advertisement in SCC...

http://shopctc.site.yahoo.net/ctcdogese.html

[Brettnrs423]

its also REALLY bad on your synchros.

Dog gears eliminate synchros. They use teeth which line up with slots to engage the gear. The slots are relatively big and as such allow the gear some slack to engage.

[Maynard/AZ]

When I drive it normal I rarely use the clutch except to downshift.

[bitabur]

Originally Posted by Brettnrs423

Dog gears eliminate synchros. They use teeth which line up with slots to engage the gear. The slots are relatively big and as such allow the gear some slack to engage.

I was talking about clutchless shifting normally, not with a dog box.

Originally Posted by Depeche

i just have to clairify that there is a difference between power shifting and shifting without the clutch

power shifting is when you don't lift off the gas pedal when you shift gears and it is hard on just about everything. typically only do this for drag racing when you are slamming the gears.

clutchless shifting is when you match rpms to let the gear out and then revmatch to get back into the next gear. If done PROPERLY it won't put any excess wear on anything. I stress properly because if not done right it will wear the syncros and you could bang up the engagement teeth.

I can clutchless shift just about any manual car i can get behind the wheel of, so i speak from experience.

*sequential trannys also can clutchless shift but thats a whole nother can of worms.

I know the difference between clutchless and power shifting, and when talking about wearing the synchros I was actually talking about just clutchless, without a dog box. Even if it feels extremely smooth when you shift with no clutch, you're still working over your synchros very hard - basically they're taking on the entire role of your clutch - they're required to synchronize the differences in engine speed, which are never going to be perfect, no matter how good at it you are. Another 30k miles down the road and you'll have a very clunky tranny because the synchros won't work very well. If you're too lazy to use the clutch I'd recommend you get an automatic transmission...

[crashsti]

sometimes i think people like to read the very last post and then let loose. if you read the first post of the thread it clearly states clutchless shifting through the use of what is known as a dog box, or dog gears. i had never really read anything on them until i saw an ad for them in SCC. speaking of syncros when refering to dog gears is fruitless, as what is apparently known as dog rings replace the syncros.

[bitabur]

It's important for people with stock gears to know about this stuff too, there's no reason to restrict this topic to talking about just dog gears.... lots of the best topics on this forum get started by accident.

[rw993]

Typically in a race application the clutchless down shifting is done by someone that is "left foot braking" and the up shift is still clutched lightly for the speed issue. You rarely ever use a clutch in a big rig except for full stop and initial start up. Nothing to it, you just need a good touch. It is ugly feeling when you miss though.........
RW