97 Silverado leaking t-case

Transfer case is leaking out the back where the slip yoke goes in. Have already replaced the rear seal in the T-case but the slip yoke has a groove wore in it from where the seal normally rides. You would have thought that GM would have made the yoke harder so the seal would not wear a groove in it. Just wondering if anyone else has had this problem????

Transfer case is leaking out the back where the slip yoke goes in. Have already replaced the rear seal in the T-case but the slip yoke has a groove wore in it from where the seal normally rides. You would have thought that GM would have made the yoke harder so the seal would not wear a groove in it. Just wondering if anyone else has had this problem????

try seals from different manufacturers...I do prefer GM seals in this area but I have found on another vehicle the seal from aftermarket was different ...