I have a 1990 toyota 4runner 4WD and it recently started making a clunking/clanking noise underneath it and the it feels like the brakes are grabbing when I go to stop. I changed rotors on front and it appeared to help the grabbing somewhat, but the noise is still there. Can't pinpoint where noise is coming from exactly, but sounds like right down middle of truck. Any ideas?
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Re: clunking noise and brakes grabbing
Check your brake hardwares make sure its in proper places and not loose. you would also want to check the caliper sliders, clean and lubricate with silicon lube. and lastly make sure that rotor backplates are not touching the rotors, you can do this by spinning the rotors while the wheel is off, if it is, then pry the backplates a little. hope this would help, goodluck.!
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Knocking noise in the air intake or do you mean a lifter noise,because you let it sit the lifter are not charged up or solidified,so you dont get adequate compression when you turn it over.if you have fuel and spark thats fine what about compression,noise from the air intake make me wonder if the timing belt is intacted.
Jack up a front wheel, and see if the front drive shaft is turning when in 4WD?
If it is, then the transfer box is fine, and it is the hubs that are the problem.
Don't know if vacuum or electric, but since both bad, it is probably at the switch.
If front drive shaft not turning, then at the transfer box. Probably a vacuum servo operated linkage. Have one person turn it on and off while watching underneath. Careful to set brake and put in neutral.
There is a few things that can cause that,..#1 is the axle shaft universal could be worn out and to check it grab the axle shaft and try to twist it back and forth to check if its loose..#2 could be the brake caliper loose or the brakes are moving around in the caliper,#3 also could be the radius arm bracket cracked at the radius arm itself which is about a $25.00 part (not including the bushings which are about $15.00 a set)check these things as my 94 Bronco has been through all of every sound and clunk with 230,00 miles
You probably have an issue with the A.D.D. (Auto Disconnect Device) on the front axle. That is what lights up the light. I'd need to know the year to get you better info. If it is newer, check the 4WD fuse under the dash. But, in any case, if it IS in 4WD, the vehicle will make tire noises on a real tight turn, and it will lurch on the same tight turn, like it is trying to drill itself into the street. 4Runners do not have a viscous coupling, in 4wd, all 4 wheels run the same RPM.