One of the reasons why we wear socks, aside from soaking up our feet's sweat, is to provide a barrier so that our skin doesn't rub directly against our shoes. Likewise, your automatic transmission extension housing bushing is there to protect against the automotive equivalent to blisters: friction wear. Unfortunately, your automatic transmission extension housing bushing must withstand a lot of abuse, so it'll need to be replaced periodically. Here at AutoAnything, you'll find a dealer-quality automatic transmission extension housing bushing at guaranteed low prices.