I had a rumble in the 62 that did not really start until 50 mph,, I thought:
transmission-just topped 323k, I have had it 10 years/since 250k and am certain it has been rebuilt..
transfer-I change the fluid about every 3 years..but scared me
u joints-at least 10 years old
rear diff-replaced 3 years ago with a front
rear wheel bearings- at least 10 years old
so I jacked it up and ran it to 55, and could not hear where it was coming from,, I did forget to stop the wheels all the way before pushing it into R, but that is part of the Rodney flush right????
then I disconnected the drive shaft at the t case... when doing that, I found that all 4 bolts connecting the drive shaft to the diff were loose,, easy fix!! Rumble gone!!!
restarted work on my home brew rear bumper since I have been without any bumpers for almost 1.5 years, I did a bunch of research here on mud.. and found out my 3/4" thick shackle hangers that are welded thru the bumper and will be bolted to the frame with 6 grade 8 bolts is probably over kill...I will probably mount this to the 60 I am selling anyway and make another for my 62...out of 3x4 instead of the 4x4 I am using..
got tired of the exhaust sound coming from under the hood, so I looked, and found one brass nut was stripped and 2 were gone.. so after an exhaustive search I found the right 10m 1.25 pitch nuts, applied a liberal amount of anti seize and new nuts/washers and the sound is about 90% gone, but still have a small leak, ,, new doughnut gaskets might fix it, if not.. I get another new exhaust,,,, long story short, go with quality over price, I did the $250 new exhaust (including the new muffler) and it almost touches my gas tank, is shoddy, and my mpg has been low since,, maybe he messed up the new o2 sensors or cats.. instead of getting the $400 job which am now certain would have been nice... oh yea and one of the cats is still below the frame and the other is so high up it is making the shifter housing too hot to touch...live and learn...
I tightened the oil pan bolts, and the lower timing gear cover bolts and still have terrible oil leaks,, I dont know if the rear is the main seal or the oil pan,, front could be either, but I changed the front seal about 50-60k miles ago..
I am glad I cut the fan shroud in half years ago because this weekend I am going to pull the fan and shroud to tighten the rest of the front cover bolts.. without having to remove the radiator etc. yippee!!
next week I will pull the oil pan and change the gasket...clean the strainer and maybe plasti-gauge the crank... anyone done this before?