If it were me, and this was your only issue to note at the moment, I’d say go for it. Long stints of mileage at operating temp would seem to be a way to ensure the lowest wear on the grinding components. I’ve put many thousands of miles on mine since it started making this noise last winter and I haven’t noticed much increase in frequency or volume, other than when I take it to the mountains and the weather gets extremely cold overnight.
I’ve owned a handful of manuals now, at least one other with a Getrag box, and I’ve never heard grinding like this. I assure you, if you heard the volume of this noise in person on a cold morning, you’d immediately change your mind. It’s very clear those synchros are grinding away faster than a high school dance with no supervision.
Trust me on this: IF yours makes the noise we are talking about, you WILL recognize it as an abnormal noise immediately. Yes, all transmissions make some noise if you listen closely enough, the "noise" we are hearing is not that. I also work on cars for a living, and can't imagine any customer I have ever dealt with accepting that this particular noise is "normal". What is curious is that (at least on mine), when the noise is there, it is obnoxious...sounds like the trans is grinding itself to bits, and when its gone, its gone...trans is perfect! Very strange!
IDK what a typical manual transmission sounds like to you but i've driven several over the last 20 years and not a single one sounded like these broncos.
That is a good clip, same status, mine does it all the time, I do feel like yours is louder just based on the clip. Mine does get a little "better" when it's warmer, but by no means gone.Here is an EXCELLENT video of the sound heard very well, this is on my rig.
Turn your volume UP when you watch.
@Butzy for your pleasure, listen below to mine
there are many, many one time use bolts involved in just removing the transmission from the vehicle. There’s no way they need to do that before ordering parts for the TSB. Your truck will be disassembled for weeks while they wait for parts to come in if they do so.
It seems entirely unnecessary too. Did they really spec TTY bolts for some of this stuff?
I thought the same when I read through that section of the WSM — it seems like every driveline bolt that’s removed is replaced, but a lot of them are lower torque specs like 35 lb. ft.
I’m going to talk to the service manager.
