There's 98 outback dohc automatic transmission.

There's everything are good running and only can drive forward.

But can't go to reverse when outback are stay and high rpm.

It's bad torque converter?

Thanks!

Most likely the clutch plates inside the trans.

Not the torque converter,  it works the same in forward and reverse.  Also not likely the transmission computer.

 

Reverse gear is engaged mechanically, check the cable and linkage.   Does park and neutral work as expected?

 

Otherwise, yes, could be a smoked reverse clutch.  What happens is that an internal leak allow the reverse clutch to be slightly engaged while driving forward, thereby quickly burning up the clutch plates.

Edited March 10, 201412 yr by presslab

This is how all the 4eat's I've seen die went. The good news is you can drive them for months like that if you park judiciously. It would be nice to know what exactly fails.