727 shift shaft seal replacement

Anything special you have to do to drop the VB ?

Other than having lots of rags handy to wipe your arms off? Not really. Loosen and remove the two levers on top. Remove the three bolts at the front and rear of the VB and 4 around the accumulator (10 total). Lower the VB. Unless someone has removed it already, there'll be a large spring between the VB and accumulator piston.The trickiest thing is pulling it forward to free the park rod from the pawl at the rear of the trans and pushing it back in later. You might be able to just lower and rotate the VB out of the way while you remove the seal.