02-18-2020, 09:49 AM
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#1
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Help with Banging Sound When in Drive and Accelerate
Sorry folks long title but racking my brain for cause. Behavior is intermittent and the title doesnt describe noise well, it feels/sounds like when a caliper breaks free thats seized to rotor. The oddness is it never happens when I put in reverse 1st to back out but when shift it into drive and press gas pedal the noise happens.
I have inspected brake shoes and calipers with no silver bullet found. It happens when it sits for a while historically but cant tie it to specific duration of sitting.
I am open to other possible causes for this and why putting in reverse doesnt cause an issue but when put into drive right after reverse the behavior exists. Drove at length yesterday after sitting for a while (approx 1 week) and no issue.
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02-18-2020, 10:04 AM
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#2
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Take it to a shop that has several lifts and have them find the problem. Get oil and filter at same time.
Could be a wheel bearing. Could be front alignment part (bushing) needing replacement.
What year? Hoe many miles?
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02-18-2020, 10:18 AM
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#3
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99 Highlander 71k miles
Has been to shop, no problem found (NPF). Oil was just done in Dec and <1000 miles on it and full PPI completed with NPF.
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02-18-2020, 11:19 AM
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#4
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check the u joints for play and flex plate for cracks if auto.
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02-18-2020, 11:49 AM
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#5
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This sounds like gear oil on the rear brake shoes. Check rear axle seals. Yes, gear oil on rear shoes can cause front calipers to grab, it also causes the rear shoes to grab especially when cold. Check for clogged diff breather too.
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Last edited by badattitude; 02-18-2020 at 01:00 PM.
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02-18-2020, 12:45 PM
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#6
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Quote:
Originally Posted by 97Cruiser40th
Sorry folks long title but racking my brain for cause. Behavior is intermittent and the title doesnt describe noise well, it feels/sounds like when a caliper breaks free thats seized to rotor. The oddness is it never happens when I put in reverse 1st to back out but when shift it into drive and press gas pedal the noise happens.
I have inspected brake shoes and calipers with no silver bullet found. It happens when it sits for a while historically but cant tie it to specific duration of sitting.
I am open to other possible causes for this and why putting in reverse doesnt cause an issue but when put into drive right after reverse the behavior exists. Drove at length yesterday after sitting for a while (approx 1 week) and no issue.
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Have someone drive the car while you stand outside of it to narrow down the location of the noise
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02-18-2020, 12:47 PM
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#7
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Quote:
Originally Posted by badattitude
This sounds like gear oil on the rear brake pads. Check rear axle seals. Yes, gear oil on rear shoes can cause front calipers to grab, it also causes the rear shoes to grab especially when cold.
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I had the same issue and this was the reason.
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1998 Toyota 4Runner 3.4 4x4 with 340,000 miles.
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1997 Toyota 4Runner 3.4 4x4 with 247k miles-Project car
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02-18-2020, 02:17 PM
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#8
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Driveshaft slip joint? That would happen when driving off after coming to a (semi-hard) stop too.
-Charlie
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02-18-2020, 03:02 PM
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#9
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Quote:
Originally Posted by badattitude
This sounds like gear oil on the rear brake shoes. Check rear axle seals. Yes, gear oil on rear shoes can cause front calipers to grab, it also causes the rear shoes to grab especially when cold. Check for clogged diff breather too.
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Thanks folks for all replies
This was my initial thought as well yanked both front and rear off though the sound seemed come from rear and all dry.
Havent checked breather but will do so.
Would cracked axle seals cause this issue?
I just dont understand why this doesnt happen in reverse.
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02-18-2020, 03:08 PM
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#10
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Yes, leaking or cracked axle seals cause the weird brake sticking. Not sure why its not happening in reverse. It did for me. Mine would require a bit of throttle to back up after sitting. Then would pop, release and be fine until I parked again. The leaking rear seal also caused the front calipers to lock up when coming to a slow stop. Super weird I know.
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02-18-2020, 05:11 PM
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#11
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Quote:
Originally Posted by badattitude
Yes, leaking or cracked axle seals cause the weird brake sticking. Not sure why its not happening in reverse. It did for me. Mine would require a bit of throttle to back up after sitting. Then would pop, release and be fine until I parked again. The leaking rear seal also caused the front calipers to lock up when coming to a slow stop. Super weird I know.
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Mine didn't do it in reverse either.
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1998 Toyota 4Runner 3.4 4x4 with 340,000 miles.
199mm TBU-Bilstein 4600-'99 Tall Springs(Rear).Almost Totally Stock
1997 Toyota 4Runner 3.4 4x4 with 247k miles-Project car
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02-19-2020, 12:49 PM
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#12
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Thanks agin all, sounds like with absence of leaking diffs contributing to sticking shoes and pads the next likely culprit is axle seals?
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02-19-2020, 01:39 PM
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#13
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Quote:
Originally Posted by 97Cruiser40th
Thanks agin all, sounds like with absence of leaking diffs contributing to sticking shoes and pads the next likely culprit is axle seals?
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That's the same problem. The leak comes out inside the brake drum area and gets on the brake shoes. Unless you removed the brake shoes to check for oily build-up inside, you won't know if that is your problem or not.
-Charlie
__________________
'99 4Runner SR5 Auto - 4WD swapped
'89 Camry Alltrac LE 3S-GTE 5spd
'17 Chevy Volt Premier
'16 Honda Odyssey Elite
Previous: '88 Camry Alltrac LE 3S-GE BEAMS, 90 Camry 3S-GTE, 90 Camry DX, '03 WRX wagon, '08 Outback XT
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02-19-2020, 02:47 PM
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#14
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Quote:
Originally Posted by phattyduck
That's the same problem. The leak comes out inside the brake drum area and gets on the brake shoes. Unless you removed the brake shoes to check for oily build-up inside, you won't know if that is your problem or not.
-Charlie
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Thanks Charlie my bad on terms. I am told the front axle boots are torn and leaking grease, would that be a cause of my issue? I could not verify this and relying on a shops inspection. I did not see any sign of grease thrown around.
I have pulled all 4 corners of wheels and no sign of any leaks or impingement to shoes or pads.
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02-19-2020, 03:55 PM
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#15
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official vendor
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official vendor
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Quote:
Originally Posted by 97Cruiser40th
Thanks Charlie my bad on terms. I am told the front axle boots are torn and leaking grease, would that be a cause of my issue? I could not verify this and relying on a shops inspection. I did not see any sign of grease thrown around.
I have pulled all 4 corners of wheels and no sign of any leaks or impingement to shoes or pads.
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Yes, that could be the cause of your issue. Especially if it's been torn for a while, dried up, and had debris in the CV.
Also, a leaking axle is visible without having to put forth any work. Just look at the inside of your rear tires. You'll see the fluid running down the tire.
Mike
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