Quick question about manual shifting

[Tcoat]

Originally Posted by 7thgear

well, for one thing an automatic gearboxes are mechanically different from manual ones...


kind of falls under that thing where people say "you should aim to shift as smooth as an auto"... when the process is inherently different....




today we all lose at internets

They ARE?????? DAMN all these years!!!!
Different sure but STILL up and down shift so still change engine revs. No matter what mechanical means causes the shift the impact on engine is the same.

SHIT even when we agree we disagree my head is spinning at this point!


Oh and if you ever had an auto tranny screw up and drop into first at highway speed you know EXACTLY what it will do to an engine! That was what caused the demise of my old AMC Concord many moons ago! There is probably still a hubcap rolling down the highway someplace.

[Tcoat]

Originally Posted by s2d4

If you are special like suberman, you always win.
Well, in your head anyways. Otherwise us mere mortals win some, lose some and learn something new in the process.

I have not learned a single thing from "He Who Must Not Be Named" or the rest of the "Technical Debate Group" thank you very much!
Mainly because I:
A) Already knew it but didn't use a thesaurus to explain it (KISS)
B) Didn't know it and therefore had no clue who was right or wrong (went elsewhere and formed my own opinion but didn't bother with joining the debate)
C) Just didn't care as much as they did (several hundred posts debating on what the air pressure in the tires should be REALLY?)

[pushrod]

Originally Posted by AdrianG

If you snap oversteer on a downshift you're doing it way too aggressively, way too early, and not rev matching.

That is exactly what I did, in a 1st-gen 4Runner, when I was 17.

Engine braking with RWD is basically light braking with 100% rear bias. It takes a lot for this to be a problem, but it can be, and in my case, has been.

[krayzie]

Originally Posted by drewbot

funny thing is that the A/T shifts up incredibly hard above <4000 RPM for a non-DCT

I've read that the A/T in the twins (design borrowed from the IS-F) has much higher hydraulic pressure than the conventional A/T in order to improve shift times, this could be why.

Dual clutch is actually pretty smooth when it is operating normally, all brands are not made equal in terms of shift feel. You can actually reset DSG to have the computer module re-learn the clutch actuation points, and during adaptation / initial drive it would feel like the tranny is about to fall off the car everytime it *CLUNKS* on shifts. Even the shifting process for DSG is different than with a single clutch gearbox obviously whether manual or automated.

[drewbot]

Originally Posted by krayzie

I've read that the A/T in the twins (design borrowed from the IS-F) has much higher hydraulic pressure than the conventional A/T in order to improve shift times, this could be why.

Upon further research, the Toyota tranny is actually closer related to the IS250/350

/offtopic

[krayzie]

Originally Posted by drewbot

Upon further research, the Toyota tranny is actually closer related to the IS250/350

/offtopic

Goto 1:26 on this video they mention the 6spd A/T is adapted from the IS-F's 8spd A/T:

[ame="https://www.youtube.com/watch?v=NO8lOjqhLJQ"]Toyota 86 presentation by Tetsuya Tada, PART 2 - YouTube[/ame]

[drewbot]

@krayzie

Toyota uses the A960E tranny in the FR-S and BRZ, also found in Lexus GS, IS

The IS-F uses an AA80E tranny

Unfortunately different cores

[oppiee]

Wow. That was a lot of posts. hah Thanks for the input guys.

Makes sense now! I will skip gears going down if speed is right