Does your Tracker have AutoLocking hubs? You didn't say if you have the 2 door or 4 door version, so I don't know if you have Auto Locking front wheel hubs on it. I have read you should NOT 4Wheel-down tow a older (1990-1997) Tracker IF you have the AutoHubs (although I've heard many people have with no problems). I believe the newer (post year 1998) AutoHubs are improved and have no problems towing.
From articles I've read, people who have old Trackers just swapped out their AutoHubs for Manual Hubs (available in junkyards, Ebay, online stores for around $150).
Then while towing, leave the front hubs in the "Unlock" position, Transfer case in "Neutral", and the transmission in 2nd gear (for Manual transmissions . . . although I know many leave it in "Neutral" also) or in "Park" if you have an Automatic transmission. This is in accordance with the Owner's Manual Book. I believe Tracker's with AutoLocking Hub should NOT be towed 4Wheel-down (I'm not positive). What does your Owner's Manual say?
This might have nothing to do with your problem, but maybe it is.
