tci 904 or built 727

Bill, the sprague canbe addressed with a bolt in unit, that uses 4 capscrews thru the case to reinforce the factory pressed/splined/set screwed factory part. but, it cannot addres the stamped steel fingers or rollers that can also fail simply because of brute force. So the drum is the secret to no explosions. You may still have a bad sprague, but nothing will explode, the car will just slow way down and feel very, very strange..lol. Think of it as instead of placing a trigger lock on a gun, taking out the bullets...