Push starting an auto

[rottodiver]

G,day everyone,
After thinking about it I have been wondering if I was to turn my automatic lock up switch on would I be able to push start my troll if I had too??
Scotty

[Alitis007]

No coz the auto uses fluid pressure to engage drive thru the valve body and not mechanical friction like a gearbox!

[taslucas]

No coz the auto uses fluid pressure to engage drive thru the valve body and not mechanical friction like a gearbox!

But a lockup switch locks the drive through the torque converter.

With the TC locked the vehicle will stall without enough revs.

I think there is a possibility although I've heard that if you leave your TC locked and try to start the car you will destroy things.
Interesting though??


FanTapstic!

[Alitis007]

But a lockup switch locks the drive through the torque converter.

With the TC locked the vehicle will stall without enough revs.

I think there is a possibility although I've heard that if you leave your TC locked and try to start the car you will destroy things.
Interesting though??


FanTapstic!

No inside the converter there are fins that the fluid pressure push against to creat the lock up so if the motor is not turning the transmission pump wont creat the pressure to lock the converter to engage drive.

[taslucas]

the "lock up" is created by a solenoid. Wholesale automatics, which manufacture a kit for manual lockup (which is just a bypass switch) say that if you accidently leave the switch locked and try to start the vehicle it will cause major damage. So obviosly theres something in there that is more than fluid presure.

and ill say again; with the TC locked via an aftermarket bypass switch the engine will stall if theres no revs (just like a manual).

Bigrig will hopefully see this soon, he has far more knoweldge than me on the subject

[Alitis007]

The lock up solenoid allows fluid to travel in a more direct path thru the valve body to create lock up that acts like a 5th gear!

If you lock the converter on idle it will over load the motor thus causing it to stall and the damage will be to the converter it self meaning you may sheer off the teeth of its internal drive!!

[taslucas]

The lock up solenoid allows fluid to travel in a more direct path thru the valve body to create lock up that acts like a 5th gear!

If you lock the converter on idle it will over load the motor thus causing it to stall and the damage will be to the converter it self meaning you may sheer off the teeth of its internal drive!!

Cheers mate, thanks for learning me stuff

[Alitis007]

Cheers mate, thanks for learning me stuff

Dude i almost blew a brain cell trying to remember how it works lmao

No dramas mate !!

[taslucas]

i reckon you should drag tank up and down the driveway and let us know if he starts or binds!!

[rottodiver]

thanks to everyone on there replies...... i have certainly learnt here that if for any stupid reason i was to leave the lock up switch on and stall the car(not that i should ever really make that mistake but stranger things have happened) it is imperitive that the switch gets turned off before restarting the car....
everything aside, autos are really quite a clever invention!!
Scotty