Posted by Caleb in Kansas [172.68.90.85] on Monday, August 05, 2019 at 00:22:35 :
In Reply to: Calling all dodge 1/2 ton WC owners!! (Transmission again!) posted by Dave [172.69.68.142] on Saturday, August 03, 2019 at 07:50:48 :
I listened to the you tube video and I'm not sure what I'm listening for exactly. I'm guessing it's the "rolling" lower frequency noise. Now, I do not have the original transmission in my WC, but I've had many old school manual transmissions in varying conditions and I wouldn't be too concerned with that particular noise myself. Let me pose a few theories:
1) could it be possible that the input bearing has a flaw in one or more of the rollers? I put new wheel bearings in my F350 a couple of years ago, used Timken bearings even, had to return one of the outers because of a race that was "wavy". Could feel the catch in it just pre loading it and turning it in my hands. Quality is questionable all around these days, we won WWII with these old trucks, but many of those skills that built them have been lost to time in these days of throw away parts.
2) Any vibration in the transmission will be amplified by the shifter. I had an annoying vibration noise in the T150 3 speed that was originally used in my CJ. Found by chance that an old Chevy body bushing slid over the shifter made the noise go away so I brazed up the slop at the rails and kept the bushing on the shifter, problem solved to my satisfaction.
3) Similar to above, are all of the bushings supporting the power train properly assembled? Is there anywhere that could be metal on metal allowing vibration to pass? Did you use any poly or hard rubber bushings?
4) Break in... maybe the new/used parts need some time to break in? Keep a real close eye on oil condition for any signs of pending doom and see if it smoothes out. Maybe adapt an oil temperature probe into a temporary drain plug to keep an eye on how hot the oil is getting?
5) Release bearing? I used a dirt cheap clutch assembly and flywheel behind the 6.2 in my jeep and it makes all kinds of racket at idle unless you ever so slightly apply some clutch pressure. I even keep a short piece of 4x4 between the body and seat frame to lean on the clutch pedal if I need to let it idle without me in the seat.
6) Is there possibly an oil slinger missing on the input side? Try overfilling the tranny through the shifter tower and see if there is any change?
Now, none of these theories involve actually "fixing" the problem, but might at least make it reasonable to live with. A lot of work and care goes into getting everything to a personal degree of done right and little things can drive us nuts. There may be no right when it comes to a certain issue. Who knows what parts have been substituted from other transmissions along the way? Pull it down again, check end play, coat gears in marking compound and check patterns... or... figure out of there is actually any damage occurring and if not, drive it! The road noise will make it go away!
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