i bought a 2000 with a bad tranny(sun shell).I purchased a used tranny out of a 2001 from a scrapper.He guarantees it but im trying to think of everything before i install it to make sure every thing goes ok.is there any way to visually in spect the front seal for damage when it was removed?and i have changed a transfer case on a blazer and a couple transmissions on other cars but not on a blazer.any tips would be helpfull.i have read some post and am going to be very careful to make sure th tc dosent slide forward before i get it in place.but id appreciate any advice on that subject.I have also been warned about the difficulty in getting to the top bellhousing bolts.basically any heads up would be helpfull.thanx