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- gainesville, ga.
Does anybody know if the auto transmission contains a retarder but not hooked up, the reason I ask is that Cranetruck's 5t 8x8 had this in his trans. which he hooked up and it worked fine. A working retarder sure would help controlling down hill speed with out using the brakes. A jake brake has it's limits with a slip-a-matic. (if not in lockup, there will not be any effect)