Mine have been fine so far. The driver side does run a little slower than the passenger. I will kind of help it out some times if I remember to open my window. But I definitely donít put any stress on it. I am planning on buying the gears just to have on stand by when they do break. I also think that running them when they are iced up in the winter probably is a good way to strip out the gears.
1996 F250 4x4 ext. cab, long bed 5 spd. 3.55ls, Tymar Intake, Tymar 4" downpipe and 4" exhaust. AIC, B&W turnoverball, EBPV brake, tranny temp gauge, boost gauge, and egt gauge. 2.5" axle drop bracket, F350 springs up front, and F350 rear axle blocks. 260k miles. RETIRED.
NEW (to me) 2005 F350 FX4 Crewcab shortbed, SRW, Lariat, auto, V10. 5600 lbs front end.