Frontier Design no longer sells the TranzPort and hasn't updated drivers since Windows 7. Is it safe to assume the TranzPort won't run on Windows 8? I need a new PC, but would hate to give up my TranzPort. Should I get Windows 7 on the new PC while I still can?

I am currently using Frontier Tranzport with Windows 8.1 and Sonar 8. I have experienced absolutely zero problems with it. Proceed with confidence.

I'm using it on Win 8.1 Pro 64 bit version  (and Win 7).  However, I had to install it in a compatibility mode in Win 8.  I don't remember if I used Vista or Windows 7 compatibility mode.
 
 

I had to use windows 7 compatibility mode back when I first installed it on a new windows 8.0 machine.
Still working with windows 8.1 update.
 
 

Thanks for all the replies. Now I feel better about upgrading.

Just to add, Sonar X3 and all my recording hardware works exactly the same on Win 8.1 as it does on Win 7. 
Back last January, my Win 7 system was down for warranty repair (actually replacement) of the motherboard.  I used my backup system which is Win 8.1 and I never missed a beat.

a second appreciation... I just built a new DAW, win8.1, and I was able to install the Tranzport driver using compatibility mode, but several of the buttons do not work. At first this seemed to coincidental, but having read this thread I guess my poor Tranzport has chosen this time to start to fail.
 
Not thrilled at all, but I guess I'm going to have to start looking at Tablet computer solutions.

UGH!

This is all reassuring to me, as I am in the process of building a new DAW running Win 8.1. So thanks for bringing up the subject. The Tranzport is still on the to-do list at the moment, but I'd be seriously bummed if I had to give it up.

bitflipper
This is all reassuring to me, as I am in the process of building a new DAW running Win 8.1. So thanks for bringing up the subject. The Tranzport is still on the to-do list at the moment, but I'd be seriously bummed if I had to give it up.

Yeah, I agree it would be hard to do without the Tranzport. Dave, you mention building a new DAW. Can I ask what you're doing for hardware? I would love to buy something from one of the custom DAW builders, but I'm afraid my budget is going to drive me to a commodity box like Dell or HP. If I had the expertise to select all my own components, I'd build my own but . . .

Note that the Tranzport mapping was coded for pre Sonar X versions (ie: Sonar 8.5 and lower).
The EQ mapping won't match up with the prochannel EQ.
I only use it for the start/stop/rec when behind the drums and also channel fader automation writing.