Rear end howl
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Rear end howl
I've got a '86 NA base RX7. When I'm going down the freeway and not on the gas and/or decelerating a little, I have a not to loud howling noise coming from the rear end. It doesn't seem to do it when the car is cold, but only after driving it for a while. It doesn't to it when accelerating. It doesnt seem to get any louder, its just one tone.
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Thanks, but When I got the car the ports were not working. it was the first thing i checked/repaired on the car. They work fine and its only while I'm coasting/driving down the freeway does it howl.(at way below 3800rpm(when the ports open)
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I have a howl from the rearend as well. It gets louder that faster you go but stays that one tone at different volume. I have been told wheel bearings need some TLC. Could be that.
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im having a smiliar problem on my '89 NA, its a real loud howling/whining noise upon decelerating or coasting, in any gear or in neutral. i'll check my wheel bearings tommorow but if its not that what else do i look for?
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It's a toss-up:
Could be wheel/ hub bearings.... Replace assemblies (repacking may not work if the container ring is mangled);
Or it could be your rear-end.... Drain diff (loosen top bolt, remove bottom one) and then fill will 90W gear-oil, or, like 'WDWFlash' said' use Redline, or some other high-grade industrio-lube.
Could be wheel/ hub bearings.... Replace assemblies (repacking may not work if the container ring is mangled);
Or it could be your rear-end.... Drain diff (loosen top bolt, remove bottom one) and then fill will 90W gear-oil, or, like 'WDWFlash' said' use Redline, or some other high-grade industrio-lube.
#10
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I would suspect wheel bearings first (mainly because they are easier/cheaper).
My only thoughts about the rear end would be that since you only hear the noise under decel or no load, that perhaps the trailing sides of the teeth on the ring, pinion, or both is worn badly (or somehow pinion pre-load or ring gear backlash was knocked out).
My only thoughts about the rear end would be that since you only hear the noise under decel or no load, that perhaps the trailing sides of the teeth on the ring, pinion, or both is worn badly (or somehow pinion pre-load or ring gear backlash was knocked out).
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update: my wheel bearings turned out fine, then i checked the rear diff and it barely had any fluid in it! so i filled it up with that royal purple stuff 75w90 and it reduced the noise by half. it isnt completley gone, so i think my rear diff is deffinatley fucked?
#16
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clokker, everything looks completely stock down there.
pvillknight7, i just looked on mazdatrix and they sell for 60 bucks each and is stated that 2 are required, yikes! am i better off finding another rear diff from a member on here for cheap?
i dont even know what gear ratio i have as i just recently bought this car, its a 89 NA and has a sunroof, rear spoiler, also has a switch for fog lights, its got vert wheels on so i dont even know what trim level i have.
but thanks for the help guys!
pvillknight7, i just looked on mazdatrix and they sell for 60 bucks each and is stated that 2 are required, yikes! am i better off finding another rear diff from a member on here for cheap?
i dont even know what gear ratio i have as i just recently bought this car, its a 89 NA and has a sunroof, rear spoiler, also has a switch for fog lights, its got vert wheels on so i dont even know what trim level i have.
but thanks for the help guys!
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so just today i drove a real short trip to the gas station and back and half way back i kinda had the same problem as far as abnormal noise from rear upon deceleration in any gear and in neutral...except my noise isnt a whining or a growling...its like a ...well it depends on the speed but its very loud and sounds like a violent clanking....
thought it could be driveshafts, or diff, but...two questions; an old timer buddy o mine who really know datsuns said that he knows for sure that its the throwout bearing and clutch plate...
well im not so sure...
also just changed rear pads...not sure if this has anything to do with it...walked along side the car as girlfriend was driving very slowly so i could see and listen from different standpoint... well first of all the irratic attempt of her slow driving made it kinda difficult but, from the out side it sounded like somthin was 'flicking' the dust cover of the rear brake disc...
gona check the diff fluid level 2morro but i just did that when i baught it not long ago...unless somthin is really wrong with it. hmm...
bearings need changed soon i know....
any ideas? maybe the sound im hearing is quite different then what this thread is about...idk
thought it could be driveshafts, or diff, but...two questions; an old timer buddy o mine who really know datsuns said that he knows for sure that its the throwout bearing and clutch plate...
well im not so sure...
also just changed rear pads...not sure if this has anything to do with it...walked along side the car as girlfriend was driving very slowly so i could see and listen from different standpoint... well first of all the irratic attempt of her slow driving made it kinda difficult but, from the out side it sounded like somthin was 'flicking' the dust cover of the rear brake disc...
gona check the diff fluid level 2morro but i just did that when i baught it not long ago...unless somthin is really wrong with it. hmm...
bearings need changed soon i know....
any ideas? maybe the sound im hearing is quite different then what this thread is about...idk
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WTB: s5 n/a ('89) rear diff, i have no idea what gear ratio it is but im guessing 4.30?
#22
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Yup. Although I'm not convinced that he'll need a totally new/used rear end. It would be wise to try to get the backlash re-set. Probably be cheaper than buying/shipping a new rear end. Takes about a 1/2 hr and any shop that tries to set it up and can't, shouldn't charge him. So, pull the diff (going to have to anyway to swap it if this one is indeed fucked) and take it to someone that knows what they're doing. If it is infact trashed, half the jobs already done.
My cars out of gas, better start looking for a new one......
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coasting, cooler, decelerating, deceleration, differential, end, howl, howling, mount, noise, oil, rear, rx7, supra, whining