Followup on 4000 rear-end/trans swap

I'm very impressed with the 8x2 transmission and 3 point, and pto.

So far only a couple of surprises including;
1 - Missing the two large lower (engine to transmission bolts)!! I noticed this while working on adjusting the brakes. That is just shoddy workmanship. I called the mechanic about this and will be picking up a couple bolts this eve on my way home from work. 2. Brake pedals were rusted together and only seemed to work as a single unit. At first I thought that they were welded together! I greased the zirk fitting on the outer (right) pedal and was finally able to get them freed up, but ended up stretching my brake springs in the process (They were probably as old as the rear end). Once I got the pedals freed up, I realized that the left brake wasn't even engaging as it required some major adjustment! Now I know why the tractor always wanted to pull to the right.
3. I think they only topped off the fluids in the rear end and tranny since they only charged me for several quarts of each. I suspect there is water in the transmission oil as it has a distinct yellowish/foamy color to it. I plan on a total drain and re-fill. 4. The rear end hydraulic fluid looks clear on top as best as I can tell, but I am learning that the filter is internal on the 4000 and hard to get at! I have two extra leftover external hydraulic filters which makes me think the newer 4600 has an exterrnal hyd filter.. Now if I can only find out how to retrofit an external filter somehow.. I think there may be some hydraulics at the front of the engine but not totally sure if that would be a good place to tap in some plumbing. In the meantime, I plan on draining some of the hydrauic fluid to ensure that it is clear, or if not, drain until it runs clear and then top off again. All in all its fun to work with and I am surprised by all that I have learned through this process. I have gained alot of respect for these old Fords and do believe that they made some great tractors back then.