3 speed auto problems

[redzook]

ok i have a 3 speed auto in my buggy when it is cold it has no problems at all.
but once it starts to heat up it looses drive below around 1200rpm, i can be driving up a rock at 1500rpm then if i slow down to under 1200rpm it is like it just kicks into neutral and will literally roll back like its not even in a gear

it does take a while to select the gears aswell

but it basically has no drive at idle or just above idle when it is warm

i have no idea with autos so any help is appreciated

[oldmate]

What does the fluid look like? you could start by flushing the lot, not just what's in the pan. change the filter too while you're at it.

[Guy]

sounds like low fluid to me ... or a pump issue (cavatation ?)

[redzook]

sounds like low fluid to me ... or a pump issue (cavatation ?)

definatly not low fluid it is very full

[Roctoy]

put a better cooler on it Tim, or look at different tranny fluids, the fluid might be heating up too much and thinning out so as not to let everything work the way it should inside the box.

[WRXZook]

sounds like low fluid to me ... or a pump issue (cavatation ?)

definatly not low fluid it is very full

How are you measuring the fluid level?

[redzook]

with the dipstick, cycling through the gears

[joeblow]

i know the problem............





its a crappy 3 speed GM gearbox................................



rebuild time........

[Guy]

with the dipstick, cycling through the gears

with the trans at opertaing temp ?

[Dozoor]

Pull the pan and check the filter Tim,
if the clutchs and plates start to come to pieces , they block the filter up
when they have been running for a while, then when it cools the stuff falls of the filter, and then gets sucked back up and blocks once started and run for a while .

Gives a similar effect as low fluid.

Oh how the f74k are ya !.

Larry

[redzook]

Pull the pan and check the filter Tim,
if the clutchs and plates start to come to pieces , they block the filter up
when they have been running for a while, then when it cools the stuff falls of the filter, and then gets sucked back up and blocks once started and run for a while .

Gives a similar effect as low fluid.

Oh how the f74k are ya !.

Larry

havent heard or seen form you for a very long time , u still got a zuk?

i havent really been able to do anything with the buggy for a while, i should be back into it in another few months putting up a shed out the back finally
is the Filter easy to spot once the pan comes off?

[lay80n]

The filter should be just above the pan, usually a black flat object with a neck that slips into a hole in the valve body. When you drop the pan it will be staring you in the face. It will have an open window on the underside of the filter where the pump draws fluid up through the filter media then into the box through the neck. Check to see if there are any bits of clutch etc in the filter when you remove it, as well as the oil that drains. Check the quantity that comes out too. When you drop the pan you only get about half the oil out of the box, the rest stays in the converter and valve body/ports. To properly flush an auto and fill with clean oil you need a power flush or simillar that pumps the old oil out as and replaces all of it with new fluid.


Layto....

[Dozoor]

The filter should be just above the pan, usually a black flat object with a neck that slips into a hole in the valve body. When you drop the pan it will be staring you in the face. It will have an open window on the underside of the filter where the pump draws fluid up through the filter media then into the box through the neck. Check to see if there are any bits of clutch etc in the filter when you remove it, as well as the oil that drains. Check the quantity that comes out too. When you drop the pan you only get about half the oil out of the box, the rest stays in the converter and valve body/ports. To properly flush an auto and fill with clean oil you need a power flush or simillar that pumps the old oil out as and replaces all of it with new fluid.


Layto....

As layto said tim,
no zook at the moment driving a quarter acre of sheet metal around at moment {GQ} ,trying to do some touring moving ect ect.
Good luck with the box Tim,

mmm sheds are good