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Old timer at NAPA told me I was torquing U-joints wrong for 15 years
He watched me smack a u-joint cap with a hammer to get it started and just shook his head. Said I should always use a socket that fits the cap perfectly and tap it in with a brass punch instead. First try with his method on a Dana 44 axle and the caps seated straight every time without damaging the needle bearings. Anyone else get handed a trick like that from an older mechanic?
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daniel_gonzalez1mo ago
Wait, you've been hammering directly on the needle bearings for 15 years? That's insane. Those bearings are tiny and fragile, one bad hit and you're crushing them. I always thought the whole point of tapping them in was to let the socket take all the force, not the punch. That old timer probably saved you from breaking a cap off in the axle tube down the road. I had a buddy who used a regular socket once and still mangled a set of bearings because he didn't seat it square. That brass punch trick is the real deal for not marring the yoke ears either. Man, I feel like I just learned something I should have known twenty years ago.
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karenb971mo ago
Hold on, why mess with a punch when a good whack with the hammer has worked fine for me for years.
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rowanhernandez1mo ago
... yeah, I had a buddy who tried the hammer direct method once and ended up chipping a race so bad the new bearing seized within a mile. He's the reason I bought a punch set the next day.
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