85w140 in rear?????

Finally at 100k im changing the front needle bearing to the ecgs bushing, just now making noise.

im putting in the Lucas 85w140 as per their recommendation.

I have a ton of the 85w140, not sure why, anyone see an issue with me putting it in the rear diff as well? Dont have any other use for it.

 

Who recommends 85W140?

Toyota recommends 75W85 front and rear.

 

I think the OP is talking about what East Coast Gear Supply (ecgs) recommends.

 

That what I was thinking.. But, I don't understand why they would recommend a different weight than OEM, unless the OP is re-gearing also. Changing out a bearing shouldn't affect the viscosity requirement.

 

Yeah I’m not sure why. When I put the ecgs bushing in my Tacoma I topped it off with the Toyota recommended weight. And when I have to put a bushing in my 4Runner I’ll keep factory recommend weight.

I’ve got just under 900 miles on my 4Runner and I think it has the needle bearing noise.

 

The heavier weight non synthetic doesnt foam, hence, better lubrication.

 

Mine had it right off the showroom floor. Did you test it by engaging 4wd to see if it goes away yet?

Why would Toyota choose worse lubrication?

 

It’s been tough to diagnose because our roads are still mostly snow covered so they make different noises than your typical asphalt. Also the sound is different than what my Tacoma made when it needed the bushing. Was starting to wonder if maybe it was just the tires or something.

But today I had a smooth patch of road and it was making the noise/ vibes and I put it in 4x4 and sure enough, quiet. Put back in 4x2 and just nasty noisy.

Cant decide if I should even mess with Toyota on this. 90 miles round trip to the dealer and with the Tacoma they “couldn’t replicate.” The Ecgs bushing fixed the vibration when Toyota wouldn’t.

 

I would say try another dealer, but how far would that be?

Plenty have skipped the dealer fix altogether. None of them seem to regret it.

I waited until nearly 30K miles. Now, I'm at 75K and it hasn't returned.

 

I have been looking at local auto parts stores for gear oil just to see what’s available. I’ve noticed the 85w140 is pretty common. I have yet to come across a local store that sells 75w85 which I would prefer. I might check and see if they would special order some for me.

 

I’m curious if anyone has tried an oil additive? I just changed my diffs, transfer case, engine oil. All of it being at 30k now. I used Archoil 9100 and it took care of the rear end howl I had.

I have been using Archoil 9100 for about 10 years due to having a 7.3 powerstroke at home. So I’ve been using it in gearboxes, and hydraulic systems, and also my motorcycles with wet clutches. Won’t work in auto transmissions though.

I wonder if squirting some in the fill of the front diff will help this out at all?

 

The additive might be worth trying to see if it quiets down that bearing (and the slightly ringing/whining sound of the rear diff). Where do you buy the stuff?

Im not sure if it will do much for the front diff since the noise seems like it’s more of a result of overly large clearances, but worth a shot if it’s not too expensive.

 

They have it on their site. I usually just use the Amazon. For gear oils it’s 3.2 ounces per quart and for engine oils it’s 1.2 ounces per quart for usage. So far for me it’s actually fixed 2 problems my 7.3 diesel (CAT design injectors) and now my rear end howl. I just started using it in power steering systems. I forgot you can do that also.