Yeah the tf-2 kit has the manual valve. It won't drop down into low at any speed unless you do the shift command mod. It's optional so you can skip it. Doesn't come with a spring for the accumulator. It tells you to use the stock one. If yours is missing or broken you'll have to acquire one. I have some for 727's but I'm not sure if their the same on 904's. If you can get me a diameter I can check what I've got and if I have one I'll send it to you.