Mark G. I'm home for the weekend. I thought about your ported hydro questions a little more today. Here goes some things to think about.
Yes, the ported pump will fit onto the 1250. You will need to get the lines and other necessary pieces from a 1450 or 1650 to make it work. The ported pump allowing for hydrualic lift was an expensive option for the non ported hydro tractors. At the time my ex-wife and I bought our IH built 682, I asked how much more to have the tractor converted to hydrualic lift. The dealer said $500.00 and wasn't kidding either.
Now... If you've installed both check valves as new they may need to be broken in. I remember years back how on the old "across-the-street-forum" the guys would rebuild their hydros and then to get the hydro check valves to "function" properly they would push the hydro lever forward backward several times to as they called it, " seat the check valves" (or something like that). Okay now THAT IS EXTREMELY dangerous and I don't recommend doing such a thing unless the tractor is jacked up off the ground and tightly secured so that it won't come off the jacks.
When you mentioned the sluggish in reverse, it occured to me while working that is the signs of a sticking check valve. Since both valves appear to be reacting in the same mannerism, I'd be a little more aggressive when using the forward/reverse lever for awhile. Only Again... USE COMMON SENSE or jack the tractor up like I previously suggested. Anything will perform more smoothly once it is broken in. It takes a little for those new parts to get "comfortable with each other".
One final thing.... If your ported hydro just has the caps on it then the implement relief spring and shims and plunger should still be present. What I am thinking is someone replaced the original non ported pump with a ported pump on your Cub Cadet.
<font color="0000ff">Calvin C. First of all Welcome to the best Forum there is for Cub Cadet information.
Now... No, I am not going to scold you for such a thing. Instead I am going to state a few things to try and help you out here.
Good thing that you did. You held the hydro lever while towing. That in effect puts the check valves into the dump mode whereas the oil will bypass and not allow pressure to build up.
How fast did you tow the Cub Cadet and how far did you tow it is my next question? A hundred feet at no more than three miles per hour shouldn't have hurt anything. More than three miles per hour or even at that speed for a longer distance there is a possibility of pressure building up and then internal damage is possible.
Here is what you should do first. Fix or replace the broken driveshaft parts. Start your tractor up and see if the hydro works. You won't know if you've done any damage until you do this first. THEN if it works as before you've been fortunate. If not check back in here and we'll walk you through rebuilding or replacing your hydro with another one. Right now I wouldn't sweat until the driveshaft is fixed.
I hope this helps both of you gentlemen out.</font>