Can you change the 833 side cover gasket with the trans in the truck/car? I'm having trouble with the used 833 trans I put in my truck shifting into reverse...with the reverse rod disconnected the side lever shifts into reverse by hand no problem. I tried to loosen the side cover bolts and tap the side cover up, but it appears someone used rtv on the side cover, as it wont budge. I think I need to remove the side cover to remove the rtv and put a new side cover gasket on..so the side cover can be adjusted, but was hoping I wouldn't have to remove trans to do so. Never messed with an 833 before....but read that the side cover can be a bear to reinstall.

Any tips, tricks, etc? Or do I need to drop the trans?