Prices for Japanese automatic transmissions may vary depending on the model and condition of the transmission. Here is the approximate price range:

Remanufactured gearboxes:

* 4-speed: $300 to $600
* 5-speed: $500 to $800
* 6-speed: $700 to $1,200

Contract gearboxes (used):

* 4-speed: $200 to $400
* 5-speed: $350 to $550
* 6-speed: $500 to $800

New gearboxes:

* 4-speed: $800 to $1,200
* 5-speed: from 1000 to 1500 US dollars
* 6-speed: $1,200 to $2,000

Please keep in mind that these are just estimates and actual prices may vary depending on the specific model and retailer.

Thanks for reading!