Mechanics... What makes shifting require more effort under engine load?

[altjx]

best not to use extra energy and force to shift unless you don't like your synchros. It should shift with minimal effort. If not, you are probably outrunning the synchros.



I doubt you will improve on the GT350 gear oil. You can change it just for fun, but I wouldn't expect that to magically make the transmission shift a lot faster.

Gotcha yeah I'm not necessarily forcing it but it does require more effort than when compared to the car being parked that's for sure. Been this way since getting the car.

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[MadCow]

You don't actually shift a manual transmission with an engine load on it. When the clutch is pushed it stops the power going to the transmission input shaft though the gears may still have some rotational inertia. If you power shift, that is to leave the the accelerator pedal at WOT while pushing the clutch and shifting the engine still isn't putting a load on the transmission​. The way the engagement teeth are made you can't even pull the shifter out of gear while accelerating unless the trans has worn teeth. Clutchless manual transmissions can be shifted under load. They have specially designed engagement teeth and sometimes split sliders with springs to engage the next gear while the previous gear is still engaged.

 

[TomcatDriver]

You don't actually shift a manual transmission with an engine load on it. When the clutch is pushed it stops the power going to the transmission input shaft though the gears may still have some rotational inertia. If you power shift, that is to leave the the accelerator pedal at WOT while pushing the clutch and shifting the engine still isn't putting a load on the transmission​. The way the engagement teeth are made you can't even pull the shifter out of gear while accelerating unless the trans has worn teeth. Clutchless manual transmissions can be shifted under load. They have specially designed engagement teeth and sometimes split sliders with springs to engage the next gear while the previous gear is still engaged.

I was waiting for someone to make this point. If you are shifting "under load" you're doing it wrong.

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