LR4 Transmission oil change... mixed feelings.

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PeterA

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Yes .... One of the nice things about VT living .... Many things cost a lot less than they do in the NY and DC area.
 

Kelly Barrie

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Sharing my latest transmission story for what it's worth. I currently have 50k on the car, had transmission service/AB conversion kit done at 35k and a transfer case fluid flush at 45K to try and resolve a slight buzzing noise that occurs at the end of each shift. You can only really hear the buzz during gears 2 &3 at around 2800rpm or when down shifting to accelerate away on the freeway. Transmission flush seemed to help temporarily, but noise came back, and transfer case flush did nothing. Incidentally, The transfer case(pun intended) was interesting. As instructed, my mechanic tried to do a transmission update after the transfer case flush, and it wouldn't take, he thought for moment that an internal electronic shift component which takes a pounding from heat decided to take a you know what and die. At the time my mechanic was stressing because no matter what he did the update wouldn't take and theres' no way he was going to call me back saying the car you brought me in good working order is now dead, and we're gonna need 3K to bring it back to life. So to his testament, he spent the next 48hrs sourcing and trying various firmware fixes. After speaking with all his landcover tech buddies/vendors it looked like the worse had happened as it's pretty common for this internal electronic part of the transfer case to fail. He then called one of his smaller vendors who told him to try his firmware update. And sure enough, update took and car was good to go. Incidentally, I still have that buzzing noise, but I'm not sure what else can be done at this point unless whatever it is fails, throws a code or something. For the record, buzzing was prevalent with original tranny oil still in the car. Doesn't appear to be getting any worse, than it was 25k ago, but time will tell.
 

Quijote

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Interesting. Glad your AB conversion kit is working well.

I must admit that I had no idea about the "necessary update." Could you please explain a bit more?
 

Kelly Barrie

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Sorry for late reply, next time I'm down at my mechanics, I'll get the specifics about the update procedure he went through. I'm pretty sure it's not necessary, and in retrospect not a good idea of mine to do a transfer case update/reset. I was trying to eliminate possible cases for the rpm humming noise which I now know is due to a missing dampener in the transfer case thanks to TrinidadLR4.
 

TrinidadLR4

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@Kelly Barrie Let me know if the dampener ended up curing your buzzing. I still haven't installed mine yet and am planning on doing the transmission fluid change this weekend, at which pt I think I'll do the dampener too.
 

Kelly Barrie

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Hey man, so dampener did reduce buzz, but has not eliminated it. It is definitely not as distracting now, but on occasion I can hear/feel it.
 

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