This depends on a lot of things. What kind of car it is, what kind of transmission, what seal or gasket is bad, give us something to work with here.
It could be leaking from a number of places. Some could be a simple fix and others not so simple. Need more info as to where it is leaking.
The cost of the repair of a transmission depends on the what is wrong with it. It could range from about $100 to several thousand if it needs to be replaced.
1200 $ for a new head and instalation
it depends on where its coming from
I had my transmission rebuilt on my 2004 Mountaineer. I believe it cost around $1800
how can i check the transmmission fluid?
I had my S type done 1 year ago it cost me £450.00
It would depend greatly as to where and why it is leaking.
Fix the cause, or keep adding fluid.
check your radiator hoses and change gaskets
Replaced the pan gasket with a new one.
Buy a new transmission oil pan gasket before your transmission blows from leaking liquid.