Weird whining noise when accelerating

[JayRolla]

I wouldn't point fingers, or say it was intentional. The story is. Me and my friend we split this truck $350 each. He got parts and I got the transmission, transfer case, front and rear diffs ( elocker ) i sold my old none elocker diffs for $$$$. Sold the transmission and transfer case for $$$$ form donor. And junked the rest of the body and got $$$$. Now, when I drained the donor elocker axle, the gear oil was clean! Then i got the axle sand blasted ( might of been here where i got F in the.....) Anyways, I put my old rear axles, because it had new OEM wheel bearings. Also put both sides new OEM oil seals. Got the truck ready, new gear oil whole nine yards. Week later after all done and said. I hear noise, and the gear oil looked like it was scooped up from the ground and poured back in.

Another theory. In the pic above where the elocker is leaking little bit of gear oil. I wasn't running the stock little plate that goes over the elocker motor. Thus didn't have that one long bolt installed. Now it looked like it was leaking a little gear oil out of there. But I really don't think that it was leaking gear oil through that bolt hole. Hard to tell and I just don't think so. But maybe because the bolt wasn't there. It did not seal properly the o-rings that the motor has. And maybe on my off-road test, which i went through a big ass water pit. Water go in ? But if water would of gotten in through that then I would say I would have seen a lot more gear oil leaking. Or maybe water seeped through around the elocker motor and into the housing? I will never know honestly. All i know is, the gears are good, and the bearings are shot. But maybe they are shot, even though they didn't break any teeth off. Now I am not a expert, but because everything in there everything is with in a thousand(s), maybe the bearing is or has worn out the gears. Such as, the "gear runout"? or the "backlash"? These things I don't know. As in I am not sure if the bad bearings could actually wear out the teeth on the gears that you will not be able to achieve Toyota's tolerance. I hope not, because gears are EXPENSIVE! and bearing kit is not that bad.

Sorry for a long post lol, bored!

Some people swap fluids before sale to make it clean. People have even filed diffs with saw dust to eliminate the howl to make a sale. Not saying any of that happened

Never leave a bolt uninstalled. Never leave a scrape plate off. I killed a new trans in my old Broncos leaving a scrape plate off and dragged my belly on a normal dirt road.

I killed a trans and clutch in my DSM by leaving an alignment dowel out. Its for alignment right? Wrong. Helps stop trans flexing at the block. Bolts are not good enough.

I learned hard way to always fully install everything that manufacturers intended.

 

[kolelt]

Some people swap fluids before sale to make it clean. People have even filed diffs with saw dust to eliminate the howl to make a sale. Not saying any of that happened

Never leave a bolt uninstalled. Never leave a scrape plate off. I killed a new trans in my old Broncos leaving a scrape plate off and dragged my belly on a normal dirt road.

I killed a trans and clutch in my DSM by leaving an alignment dowel out. Its for alignment right? Wrong. Helps stop trans flexing at the block. Bolts are not good enough.

I learned hard way to always fully install everything that manufacturers intended.

Not going to argue there bud

 

[johnbyebye]

I wouldn't point fingers, or say it was intentional. The story is. Me and my friend we split this truck $350 each. He got parts and I got the transmission, transfer case, front and rear diffs ( elocker ) i sold my old none elocker diffs for $$$$. Sold the transmission and transfer case for $$$$ form donor. And junked the rest of the body and got $$$$. Now, when I drained the donor elocker axle, the gear oil was clean! Then i got the axle sand blasted ( might of been here where i got F in the.....) Anyways, I put my old rear axles, because it had new OEM wheel bearings. Also put both sides new OEM oil seals. Got the truck ready, new gear oil whole nine yards. Week later after all done and said. I hear noise, and the gear oil looked like it was scooped up from the ground and poured back in.

Another theory. In the pic above where the elocker is leaking little bit of gear oil. I wasn't running the stock little plate that goes over the elocker motor. Thus didn't have that one long bolt installed. Now it looked like it was leaking a little gear oil out of there. But I really don't think that it was leaking gear oil through that bolt hole. Hard to tell and I just don't think so. But maybe because the bolt wasn't there. It did not seal properly the o-rings that the motor has. And maybe on my off-road test, which i went through a big ass water pit. Water go in ? But if water would of gotten in through that then I would say I would have seen a lot more gear oil leaking. Or maybe water seeped through around the elocker motor and into the housing? I will never know honestly. All i know is, the gears are good, and the bearings are shot. But maybe they are shot, even though they didn't break any teeth off. Now I am not a expert, but because everything in there everything is with in a thousand(s), maybe the bearing is or has worn out the gears. Such as, the "gear runout"? or the "backlash"? These things I don't know. As in I am not sure if the bad bearings could actually wear out the teeth on the gears that you will not be able to achieve Toyota's tolerance. I hope not, because gears are EXPENSIVE! and bearing kit is not that bad.

Sorry for a long post lol, bored!

To give you a little peace of mind here, my parents unknowingly drove their '02 suburban with worn carrier bearings for umpteen thousand miles. They weren't making noise but there was a clunk anytime it was put into reverse. They took it to a shop and it was diagnosed as the transfer case. I rebuilt it for them and put it back in. Still clunked. U-joints checked out. I had a suspicion that it might be in the rear. I removed the diff cover to discover that the differential carrier was FREE FLOATING on the passenger side axle shaft. The bearing was completely shot. Needless to say, I ordered new bearings, had them pressed on and it's been fine ever since. No damage was done to the ring or pinion gears. Maybe they got lucky? Who knows. I'd wager your ring and pinion are fine though.

 

[kolelt]

To give you a little peace of mind here, my parents unknowingly drove their '02 suburban with worn carrier bearings for umpteen thousand miles. They weren't making noise but there was a clunk anytime it was put into reverse. They took it to a shop and it was diagnosed as the transfer case. I rebuilt it for them and put it back in. Still clunked. U-joints checked out. I had a suspicion that it might be in the rear. I removed the diff cover to discover that the differential carrier was FREE FLOATING on the passenger side axle shaft. The bearing was completely shot. Needless to say, I ordered new bearings, had them pressed on and it's been fine ever since. No damage was done to the ring or pinion gears. Maybe they got lucky? Who knows. I'd wager your ring and pinion are fine though.

You probably right. That's why they have different size washers.