Quote:
Originally Posted by orange4boy
In stock form it shifts too late (for FE), With the TC lock, it shifts too early for the rpm.
A while ago, I tried loosening the kickdown linkage which just made the shifts slower and soggier. On the Toyotas, tightening it it changes the pressure in the valve body and makes the shifts harder and quicker. Supposedly this reduces wear on the clutches. If tightened, it jumps a bit when you put it in first or reverse gear. It does not seem to change the shift points although I should confirm this with my new tach. The other suggestions, I don't know.
Yes, I can downshift and upshift normally so the wrong gear thing is not a big deal, just kind of embarrassing in a new driver sort of way. There does not seem to be any shift shock at the throttle positions I am shifting at. you can feel it shift more positively but i wouldn't call it shock. Way more "shock" when I downshift in stock form and there is no prohibition against that.
|
The general rule, due to the way things are constructed in both types, is that Automatic trannies, you shift hard and fast, and manuals, you shift slow and deliberately.
I know for a fact I can take a brand new transmission and grind gears w/ the clutch fully disengaged, by jamming the synchros. (Shifting like a ricer, with all the torque my arm can put on the shifter) I've broken shifter levers demonstrating how NOT to shift a manual. (Aluminum short throw shifters)
In an automatic, the clutches are allowed to slip so that the gears aren't engaged as quickly. It's an NVH concern that "shift shock" might disrupt the "driving" experience for consumers. If you can get it to shift firmer, take comfort in the added shift shock by knowing that your transmission will last longer than the next guy, because you're not subjecting the clutches to extra wear. Automatics shift into the next gear before releasing the first one, which is why the clutches are allowed to slip. Higher pressure causes the scenario to play out faster, meaning a harder gear engagement, more positive shift feel, and less slippage.
This also equates to less heat generated.