The whine is the front differential. It was a recall regarding that, now expired. Mine has a small whine too, but short of rebuilding that...The ONLY other thing I can find is a faint whine when I’m in the gas; it goes away when not on the throttle. There is also a howl from the rear brakes. Only when applying them. Makes me wonder if it’s the vicious coupler but they wouldn’t explain a shake/wobble
Sounds good. I suggest you consider the return line flush instead of just a change (the change only gets 1/3 to 1/2 of the fluid). There are lots of opinions about the fluid to use (Toyota or Valvoline) so it’s up to you - there are a few threads on here (search MaxLife) but there is a lot to it. I’ve been running half maxlife and half original (no time to do the flush, but it’s coming soon) for the past 12 months and although I did notice a little bit of a difference in shift behaviour it’s been fine and I will complete flush this year with a full MaxLife change out.I have not checked for stored codes but will. The motor pulls a nice steady 20 bar vacuum at idle, with less than 1/15th of a bar of "wiggle"
As for the trans fluid, its original, i'll do a drain and fill either way, but basically, at 60-70, this happens with even the slightest foot on the gas... I DO feel it more under hard acceleration, but at 70, for example, on a flat road, i feel it. Its worse with more throttle, it disappears with 0 throttle.
I'll report back on stored codes and results with drive shaft out, and a tranny drain/fill
Do a search for “return line flush” in 4.3 mechanical. When I did my fluid on my 2.5, I tried using the drain bolt but it was stuck and I didn’t want to round the head, so I simply dropped the pan (good practise anyway, as I could inspect and clean the magnets, and was able to get (based on refill volume) half of the system fluid out. For the return line flush, you start with the pan drop, then pull the return line and have a helper start and stop the engine, while you watch the fluid coming out. There’s more to it, but see the other thread.oh yea for sure but a return line drain-fill doesn't mix old with new... a drain fill basically replaces 1/3... so you have .67 old, then that x .6 and then that x.6 and so on... never 0 old and many drain fills to get close i guess. I drain fill my Lexus and Honda but those dont feel like they are off roading in the middle of a smooth road =( this has me worried. Only the drain fills, the newish axel, and a motor mount can be left... motor mounts look good, motor isnt violent when shifting (either in acceleration or stationary from P-D-R)
heres to hoping