Time for a mechanical problem report card.
I spun the center section of the rear axle while in Moab, resulting in the rear drive shaft being spit out of the pinion yoke. We welded new spring perches on the axle housing in Utah, and stitch welded the center section to the tubes. I thought this fixed everything. I was wrong.
I have recently developed a slight vibration from the rear drive line, like a u-joint was going bad. Below is a picture of the "sealed" Spicer U-Joint that was installed in Moab (forgot to buy a greasable joint). Note the color of the "lifetime grease".
Besides looking burnt, it smells burnt. This U-joint has about 5,000 mile on it, should not look like this. The problem, however, was not a bad joint, but I damaged the rear pinion yoke when the axle center section spun. One of the little metal "tits" on the side of the yoke must have got bent when the u-joint exploded. The below pictures show the little "tit" I am talking about.
This slightly bent piece was causing the U-joint to slide back and forth, from side to side, about 1/8". This damaged the U-joint and caused the vibration.
I hammered the little 'tit" back straight, installed a new greasable U-joint, and no more vibration. BUT, when I bent the 'tit" back, it cracked slightly. I plan on just putting a small weld over the crack, and then repeat the process on the other side to avoid any possible "balance" issues. First picture shows a new u-joint installed on the pinion end of the drive shaft. The second picture shows the transfer case end of the drive shaft. Note how much thicker the "tit" is on a Dana 300 output yoke vs an AMC 20 yoke. Both yokes are new Spicer yokes.
The reason I don't just change the yoke is due to the crush sleeve which is utilized on the AMC 20 pinion. If this was a Dana 30/44/60, I would simply replace the yoke and re torque the pinion nut to specification. On the AMC 20, there is no per sey "torque spec", and I always end up tightening just a little bit too much resulting in a collapsed spacer

I have had bad luck in the past messing with these things, and since this rear end works/is set up perfectly, I am willing to let sleeping dogs lie. The little "tits" are not under any real load, but they do need to be present to keep the U-joint in place. I believe the weld repair will work perfectly. If it does not, I will report back.
I removed my IAC (Idle Air Control) from the throttle body in Michigan to loan to Eric for diagnostic purposes on his 4.0. Ever since then, I have a slightly too high idle of 900-1000 RPM. I have repeatedly cleaned, removed, unplugged the IAC, but the idle is still too high. I will replace the IAC and report back.
I was experiencing a slight whistle sound from the engine. At first it would only happen momentarily after driving for long periods of time at sustained highway speeds. It gradually started happening more frequently, until it started whistling all the time. I tracked the whistle sound down to the power brake fitting on the intake manifold. I tightened it up, it would stop for a few weeks, then reappear. Well, after several removal/Teflon tape/re-toque episodes, the fitting snapped off while in Michigan. I removed what was left of the fitting form the intake, "Borrowed" a pipe plug from Eric's on-board air system, and voila, no more whistle sound

I believe the factory fitting had a hairline crack in it that just got bigger the more I messed with it, until it finally broke. But so far, knock on wood, no more whistling
Now, the "biggie". I have noticed that the T5 is little bit noisy. Not a "bad" sound, but I can hear a constant sound from the transmission. Not a clunk, bang, whir, clash, whizz, thunk, or any other "death sound", but you can hear something turning/hear the transmission spinning. The noise is present in all gears, and with the transmission in neutral with the clutch released. The only time the sound is not present is when the clutch pedal is depressed. This leads me to believe that maybe I have a bad input shaft bearing or main shaft roller bearing. I am going to check all the easy stuff first (1) All attaching bolts and mounts to rule out slight misalignment possibility. (2) Fluid level/condition. If none of the easy fixes cure the noise, I will drop the transmission and investigate. It is very slight noise, so I plan on driving it. If it suddenly gets worse, then I will immediately drop the transmission. Hopefully it is something simple, but usually transmission noises equal pain in the butt work.
That's it for now
