"David J and Lynne J Shepherd" <
[email protected]> kindly wrote:
> Stacey, up here in NY all the salvage yards give at least a 30 day guaranty
> on drive train parts, but you still don't know if it is bad, the diff could
> be the problem especially with the evidence of metal in the unit, if this is
> from the spider gears, it would not move at times like you experienced.
Yeah, I can see that...good point. And the plot thickens b/c:
I just got back from the mechanics and he was saying it doesn't make
sense that I only heard the whine once three weeks ago, and that it
stopped after that. That once a rear end goes, it goes. It might start
whining softly, then get louder with time, but it doesn't kick in LOUD
then disappear the next day and not reoccur!
So my Dad and he came up with a theory... the mechanic brought over
one of the bearing "wheels" and although we couldn't view the bearings
themselves (b/c they are sealed in this wheel), he could feel by
turning it that there was a bad spot on the side with the bad seal
(where the diff oil was leaking into). He says the diff oil likely
washed all the grease out of the bearings, and that if some debri got
in there, the whine I heard could have been the bearing 'going bad'
from the friction... and the silver in the axle and diff oil could
have been bearing material -- not gear material. !!! YAY!!! That would
explain why I heard the noise all the way home, and even when backing
up, but that why the next day (after the bearings cooled maybe and
shifted to displace the debri) the noise disappeared and hasn't come
back. He refilled the diff with oil and the truck drives great. And
like I said, it hasn't whined since that one night a few weeks ago.
So I'll drive it around town here for a month or so, then pull the
bottom diff plug (use the filler plug to keep the new oil in there)
and check for more silver. If it *was* from the bearing any residual
stuff I find should reduce with time as I clean off the plug and
re-check again after another period. If it's the rear end going
though, I should find lots of material and it will only get worse. And
in the midst of that I guess I'll see if the trans acts up, but so far
it was just that one weird episode. Otherwise it shifts great and
never lunges or lags (i.e. does not feel worn). Even the mechanic
doesn't understand it cause the truck runs so great!
I'M SO HAPPY THERE'S A CHANCE I CAN KEEP IT!
I love this truck! (Sorry for emoting.)
Here's a pic if you're
interested:
http://www.tanked.netfirms.com/toy4x4.html
Thanks so much for helping me. If you made it reading this far, I'd be
interested to know your thoughts on the theory... sound possible?
Stacey