I drive a 97 Ranger 4x4 and my wife drives a 98 Explorer 4x4 - both came with Firestones. They suck.
1)My wife had a puncture at 8K - a STAPLE punched through the center of the tread - NOT a nail, a STAPLE.
2)My wife used to drive a T-Bird (our new son made 2dr coupes impractical) and got her money's worth out of corners. On her Explorer, driven much more moderately, the Firestones howl and squeal inordinately in corners. Inflation is to factory spec (26 lb). These are decently large (235/75/15) tires for this size truck - they just suck.
3)Even in light mud on logging roads, they get packed quickly enough to cause sliding (forward and back, not side cornering - I'm being reasonable).
4)In a bizarre snowstorm (we get snow every 30-40 years) with two inches on a flat freeway, steering control was mediocre at best (see my basis for comparison below).
3)My Ranger wears the Firestones b/c I don't want to use up my 2nd pair of BFG's on the street - 215/75/15's on steel 15x6's (factory). I got a puncture through the tread as well, but at least it was a screw and not a STAPLE.
4)I have AR 767 15x8's and 31x10.5 BFG AT's for fun - I bought the first set at 1K b/c I got my butt stuck so bad doing a U-turn on a logging road, I couldn't justify leaving the stock tires on when driving off-road.
5) Trip from Reno to Sacto during a heavy snow in Jan-98, BFG's were fabulous including driving off the freeway to find a potty - 5-6" of packed snow with 2-3" fresh on top, didn't get too clogged and kept good directional stability even through tight (VEEERRRYYY slow) corners coming down steep hills. NO COMPLAINTS - I would have been very bummed with the Firestones.
6) Off-road in snow, there's no comparison. Even with terrible weight distribution in my Ranger, my wife's truck isn't as planted even though it has a much smarter 4x4 system and has an L/S (same as my truck).
If you have the 4 rims already, I'd look at the Goodyear's Paul has - he's a discriminating buyer!!
Gerald - I totally understand your $$ issues - that's why I quit running my BFG's on the street and haven't yet replaced my wife's tires.
I would say in the long run consider getting a good set of steel wheels cheap (I got mine for $29.95 a piece - Sears foolishly gave me a $60 off any set of custom wheels coupon) if you want to run offroad. Keep what you have and plan for the next 100K miles.
The Firestones are OEM equipment b/c they're hella cheap for Ford to buy and they look "tough." If you see them at Costco, you'll know what I mean about cheap.
I don't mean to wail on the folks that are satisfied with their Firestones - my perspective is a little wider, spanning two different vehicles and two different tires, constrained only by MONEY!!
Regards,
Brian in CA