Hi Gang, Everyone have a nice Christmas and New Years? Thought I'd drop in, say hi and see if maybe a few here have ideas with a non-
ecig question that's been nagging me.
I've been busy, prepping for holidays, putting out some fires and now trying to keep my mind busy with non-physical stuff that I can do. The spine pain has been getting a lot worse, more bad days then good the last six-seven weeks. It's easy to take the pain meds, zombie out and sit in a chair all day but that's not going to help, I need to keep moving and keep my mind busy. Been putting my irons in other fires plus I've got
mod parts waiting to assemble. I've also got a new bolt action 30-06 coming and a new upper for another rifle. I'll spend some time reloading for both and hopefully get to the gun club before the snow returns, no snow showing until the 11th and the snow is gone here now, I'll take it!
Anywho, here's something that's been nagging me, a mechanical stumper, when working on my wife's Buick LeSabre a couple months ago I found the front drive axles should be replaced soon and I noticed the lip seals on the trans where the axles slide in are weeping so I'll replace them at the same time. I grabbed ahold of the inside of the axle where it slides in the trans to see how much play there was to check the bearings and found on the right side more movement then I would expect. So looking at exploded views of the transaxle I see on that side they have a roller bearing stacked with a bronze bushing on the inside of that, now why would they have both??? Here's some images
An semi-full view breakdown, the blue line shows where the axle shaft slides into the case extension housing, part #4 is the lip seal
Here's a close up, the red line shows how the parts assemble, roller bearing #7B (above) goes in 1st, then the bronze bearing 7A (lower)
It's just one of those things I've seen over the years from twisting wrenches that leaves me scratching my head,
Why did they design it that way? Does it matter? No, but these are the kind of questions I've always found interesting, I'm driven to find the answer and I can't let it go until I do. Why would they put a soft bronze bushing in with a roller bearing, a bearing that will withstand high stress pressures? I worked as a GM tech early on up until the 80's then from then on strictly imports so these later model GM's I'm not as familiar with and I've never seen bearing/bushing stacking like that before. Got to be a reason, I just can't think of one, thoughts??