its all in how you take care of it. my ford had almost 300k miles on it running strong when i sold it. it had nothing more than a tune up and new alternator on the original 302 engine, tranny was replaced at 250k. 4wd was smooth as could be and i never had any problems with that truck. most of my friends drive chevy's, half of them are decent, the other half are complete pieces of shit but that happens with fords too.

my buddy has a 99 silverado that sees light mud maybe twice a year if that and hes on his 3rd transfer case, 2nd rear diff, 3rd front hub, and countless front axles. not to mention it runs like total shit. another friend with a silverado hasnt had a problem except for the cv axles which is common.