Posted by Dave [172.69.68.234] on Thursday, August 15, 2019 at 06:52:30 :
Follow up to my earlier posts about the transmission growling/noises in neutral
It’s fixed.. Noise is now gone.
In addition to the noise gone while running in neutral, the truck is just quieter all around. And thru all the gears.
Vibration less too. Go figure
so I believe I have been successful. A little more road time will tell, but initial short drives have been all positive
what NEW parts did I end up changing out?
1- Input shaft to a NOS unit
2- Main shaft to a NOS unit
3- the reverse idler shifter fork.
WHY? because I thought i had a bent one.. well I did actually, at one time so I wanted to take no chances that this, being bent, could allow the reverse gears to move forward and barely touch the rotating cluster gear set.
Amazes me that just that pitting (OR spauling) on the main shaft and mating input shaft could cause such noises. Its like driving a different truck now.
I can only believe that this area of wear was the ultimate culprit here.
However, to be fair, its possible that the use of the better 1st/2nd and 3rd/4th sliding gears added to this noise reduction. I had a beat up tranny where those gears actually looked better and fit tighter on the new main shaft.
perhaps Ill never 100% know or be sure
My thanks to all who have participated in helping diagnose this issue.. I am grateful.
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