[longassname]

The application of the brake band engages 2nd and 4th not 3rd. If the transmission flares ( A "flare" is when the rpms go up but the vehicle speed doesn't increase--ie slipping of a clutch or band. ) going into 3rd it isn't because of the brake band being loose--that is when the brake band is being released. For 3rd gear the brake band is being released and the high clutch is being applied. A flare going into 3rd gear is the high clutch slipping.

A burnt high clutch can be replaced inexpensively if handled the way I suggested to you. If you continue driving with a bad high clutch you might loose your entire transmission--then again you might just loose 3rd and 4th gear and get another chance at getting only the high clutch and brake band (at that point the heat from the bad high clutch will 100% definitely have taken out the brake band as well). I just want you to understand that you are driving on a bad high clutch. There isn't any doubt about that.