I was temporarily brain dead and pricing a new Liberty
earlier this year. Was told all new buses come standard with retarders and a Jake would lower the price by 6 grand! I can't understand why anyone would pay an extra 6K to boil their tranny oil. Jakes have been around forever, work great and are just about bullet proof. My old used bus came w/the retarder, works ok, but I can't help feeling there's a plot involved to sell transmissions.