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Message: <blockquote data-quote="Jrgunn5150" data-source="post: 255178" data-attributes="member: 9682">So yeah, I'm back to driving my old truck, a 1977 F250 4x4. 4 speed, D60 D44 4.10, etc. My dad bought the thing new, and I learned how to drive in it, as did my little brother. It's alway been a woodhauling, snowplowing beast.The funny thing about it is, the mains have rattled for as long as I can remember. I mean, when i was a kid, I could tell when my dad was getting near because I could hear them. The truck pumps 20 psi cold, and about 5 hot, always. I asked my dad about it before3 and he said Ford swapped the motor back in the day because of it, the old one rattled and the new one rattled too ("been rattlin for 20 year's, probably rattle for 20 more!"). I was just wondering, has anyone else ever seen this with these motor's? A few older guy's have told me they were just like that, I find it weird myself. BTW the truck has 178k on it now.</blockquote>