Well, if you could provide a little more info, there are folks on this forum that probably have some ideas.
1. What manufacturer's system is it? i.e. Ariens, Craftsman, etc.
2. By stronger, do you mean that the tracks slip and don't push the front of the machine where you want it to, or do you mean it hits a snow drift and stops with out the tracks slipping?
3. How old is the machine? (relevant to items like disk drives, if applicable or drive belt maintenance, if needed.)
Thanks to you both for your quick responses. Here's a little more information:
What manufacturer's system is it? How old is the machine?-- 1 yr old Troy-Bilt Storm Tracker 2690. However, I bought it locally from a guy that takes the original machine and upgrades the engine (in this case to a Briggs & Stratton 1350 Snow Series -- 305cc, 13.50 ft-lbs gross torque) and the auger. I'm not sure if anything was done to the gearing/drive. The reason for coming to this forum for answers is that the guy is a little flaky and I'm getting a bit tired of trying to get information from him. I believe Troy-Bilt gets their machines or at least their major components, like many others, from the same company in Canada (don't have the name right off).
As far as stronger goes I mean it hits a snow drift and it just stops. The tracks don't slip/break traction, so I'm assuming something internally is slipping. I'm not expecting the machine to bulldoze through the slush, ice and heavily packed snow the snowplow pushed in front of my house (though it would be nice :-). I just think I hit some drifts that should be "do-able" if the tracks could just keep pushing a bit more. The auger and engine should be able to handle it, but the drive doesn't seem to be comparable. I don't know how else to describe it. I don't think I'm getting hung up on ice or anything like that as well.
I don't know if the drive is a disk drive or a belt drive, but could dig into it a bit more to find out. I don't hear anything when I think something internally is slipping, which makes me tend to think it's a disk drive (please correct me if I'm wrong, but if it were a belt drive I would expect to hear a whine or something similar to a car that has a belt slipping). This isn't an area of expertise for me. Maybe some water gets into my drive and causes some slipping? Dunno.
If any further information is needed the help clarify, please let me know. Thanks again for your consideration and time.