so i just got a 94 4runner IFS 4x4 and from about 25-50 mph it is making a chattering / grinding noise from both front wheels . I serviced front and rear diffs with a synthetic blend gear oil, and also cleaned and repacked both front wheel bearing and seals is there anything else i should check?
front end making chattering noise
- Thread starter caddyhack
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yes i have auto locking hubs just swith gear into 4wd and go. it sounds to be a bearing sound but i just pulled rotor and regreased all (4) wheel bearings. The best way i can discribe the sound is; take a wheel bearing and hit it with air from your air compressor and make the bearing spin and you get an dry bearing chattering sound but i just lubed them.
it doesnt sound like an axel/cv boot sound its not making a clicking noise im at a stand still on it and cant figure it out :wtf:
it doesnt sound like an axel/cv boot sound its not making a clicking noise im at a stand still on it and cant figure it out :wtf:
SKIDPLATE
New member
Auto Locking hubs probably
Mine never worked very well either. For $100 you can get the manual Aisan hubs used and that will probably fix your problem. Besides, you'll end up swapping them eventually so you might as well do it now.
OK, so try this. Go ahead and remove the Auto Locks from your front wheels. They won't effect the integrity of the wheel/roter function, you just won't be able to lock your front hubs. If the problem goes away, you know that was it and you can basically put the covers back on and run them free wheeling until you get the Aisans. If that doesn't fix it... well now you know it's not that. But get the manual locks anyway. Believe me, the autos suck. They disengage whenever you go in reverse. So don't get stuck and have to back up.
Mine never worked very well either. For $100 you can get the manual Aisan hubs used and that will probably fix your problem. Besides, you'll end up swapping them eventually so you might as well do it now.
OK, so try this. Go ahead and remove the Auto Locks from your front wheels. They won't effect the integrity of the wheel/roter function, you just won't be able to lock your front hubs. If the problem goes away, you know that was it and you can basically put the covers back on and run them free wheeling until you get the Aisans. If that doesn't fix it... well now you know it's not that. But get the manual locks anyway. Believe me, the autos suck. They disengage whenever you go in reverse. So don't get stuck and have to back up.
90toytruck.
New member
guessing this has happened to you ?
sephryan
New member
I had this exact thing happen to my 94. Had a real annoying chatter sound coming from both sides. Tried everything from putting in new axels to repacking the bearings. Turns out there is, from what my mechanic told me, a bushing (possibly brass alloy) that the outer portion of the front axles seat in. He never showed it to me but said that they were completely worn out and that the axles were just sort of flopping in the wind inside the wheel area. So, once they were replaced everything was tight again and the noise was finally gone. I took it to him 4 times before they finally figured it out. I had him go with me on a bunch of test drives to show him the noise which helped a great deal.
Also, he recommended switching over to manual hubs which I did. Now the front axles don't spin at all while city driving. They will help save needless wear and tear on your axles, axle seats, and axle boots. Haven't heard the noise since I did that. Now it is sort of best of both worlds. I can engage my manual hubs and then my set up is like before with the autos, or disengage them and I don't have to worry about the needless spinning of my front axles while in the city. Hope this helps.
Also, he recommended switching over to manual hubs which I did. Now the front axles don't spin at all while city driving. They will help save needless wear and tear on your axles, axle seats, and axle boots. Haven't heard the noise since I did that. Now it is sort of best of both worlds. I can engage my manual hubs and then my set up is like before with the autos, or disengage them and I don't have to worry about the needless spinning of my front axles while in the city. Hope this helps.
fishrod
New member
So what your saying is when you engage your manual hubs you can still leave the mini gearstick in 2HI and you will drive around in 2 Wheel drive? When you move the gearstick to 4HI it will engage the front wheels??
I never knew that, I thought you had to get out of the car and engage/disengage the hubs everytime you wanted to go from 2HI to 4HI and vice versa.
