HELP!!! Drive Train Experts> Grinding/whine noise from rear end
#1
HELP!!! Drive Train Experts> Grinding/whine noise from rear end
Having a bit of an issue and not exactly sure what to troubleshoot. Hoping someone with some knowledge can help me get this sorted out.
Drive train:
Rebuilt R154 Redline MT-90 fluid, 3.5" DM Aluminum drive shaft, TT auto Diff 3.76 gearing with a TRD LSD Royal Purple Gear MAX LSD fluid.
Issue #1
When doing slow turns either left or right, I can hear some sort of clunking or perhaps grinding coming from what I believe to be the rear diff. When I Drive in a circle, there is no clunking or grinding noise?
Issue #2
The other thing I noticed when going in a straight line from any speed there is whine noise as well. Maybe it have something to do with issue #1. When speeding up the whine gets louder and louder. Same goes with decel but "whines" down until a full stop is made. Almost sounds like something is rubbing. I checked tire clearance to wheel well and there is plenty of room so the tire shouldn't be rubbing against anything.
Any help would be great. This is the only thing holding me back from getting on the dyno minus tweaking the Tune some.
Thanks in advance.
Drive train:
Rebuilt R154 Redline MT-90 fluid, 3.5" DM Aluminum drive shaft, TT auto Diff 3.76 gearing with a TRD LSD Royal Purple Gear MAX LSD fluid.
Issue #1
When doing slow turns either left or right, I can hear some sort of clunking or perhaps grinding coming from what I believe to be the rear diff. When I Drive in a circle, there is no clunking or grinding noise?
Issue #2
The other thing I noticed when going in a straight line from any speed there is whine noise as well. Maybe it have something to do with issue #1. When speeding up the whine gets louder and louder. Same goes with decel but "whines" down until a full stop is made. Almost sounds like something is rubbing. I checked tire clearance to wheel well and there is plenty of room so the tire shouldn't be rubbing against anything.
Any help would be great. This is the only thing holding me back from getting on the dyno minus tweaking the Tune some.
Thanks in advance.
#2
Lead Lap
iTrader: (4)
#1 - I've read some types of the LSDs are prone to making noise in corners. I think it's the clutch type as the clutches wear. Don't know what the TRD one is.
#2 - Assuming the LSD wasn't factory installed, the ring and pinion are probably not set up 100% properly and the whine is gear whine. Setting up gears is an art that a lot of people haven't mastered.
Either way should probably get it checked out by a highly reputable diff shop.
#2 - Assuming the LSD wasn't factory installed, the ring and pinion are probably not set up 100% properly and the whine is gear whine. Setting up gears is an art that a lot of people haven't mastered.
Either way should probably get it checked out by a highly reputable diff shop.
#4
Prior to installing the Diff I had a local 4x4 shop that had setup many axles before take a look at it and he said by just the feel of the gears, "everything feels good, Id run it"
The TRD LSD is a 2 way and Ive searched on SF and it seems like all of them don't have any noise coming from the LSD.
Is there anything I could check on the car before I actually have to take the diff out and home someone take a look at it?
The TRD LSD is a 2 way and Ive searched on SF and it seems like all of them don't have any noise coming from the LSD.
Is there anything I could check on the car before I actually have to take the diff out and home someone take a look at it?
Last edited by 8052JZ; 04-24-14 at 10:11 AM.
#5
Lexus Champion
iTrader: (10)
Not sure if it would be helpful but I would jack the rear wheels up and start spinning the tires one side at a time and see if you can hear or feel anything catching inside the diff. you could try turning the driveshaft also to simulate the input side of the diff but that might prove difficult to actually do.
#6
Bearing
Sounds exactly like one of your rear wheel bearings is going out. Mine was doing the exact same thing as yours except the grinding/whining stopped when I was turning.
#7
Not sure if it would be helpful but I would jack the rear wheels up and start spinning the tires one side at a time and see if you can hear or feel anything catching inside the diff. you could try turning the driveshaft also to simulate the input side of the diff but that might prove difficult to actually do.
Funny thing is I was thinking the same but I cant seem to understand why this would happen right after the build was finished. Its only been on the street for about an hour total. Before the build, there was no whine at all before it hit the garage and got torn down?!? So I'm guess it has to be something with the new parts that where swapped in. Like the TT auto Diff with TRD LSD in it.
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#8
Bearing
I read the instructions for changing the bearing including the need for a special press and just went out and pulled the entire wheel hub assembly off another car at a pick a part place. Maybe you have the proper tools to just do the bearing, I didn't.
#9
Super Moderator
iTrader: (34)
Prior to installing the Diff I had a local 4x4 shop that had setup many axles before take a look at it and he said by just the feel of the gears, "everything feels good, Id run it"
The TRD LSD is a 2 way and Ive searched on SF and it seems like all of them don't have any noise coming from the LSD.
Is there anything I could check on the car before I actually have to take the diff out and home someone take a look at it?
The TRD LSD is a 2 way and Ive searched on SF and it seems like all of them don't have any noise coming from the LSD.
Is there anything I could check on the car before I actually have to take the diff out and home someone take a look at it?
As Ali has noted , did you notice any noise coming from the wheel hub/bearings which was the problem I had at one point in time ?
#11
Also sense I replaced all the suspension stuff in the rear with the BV parts, no alignment has been done yet. With not having an alignment done cause the tires to whine?!? These are fresh 315 R888s
#13
Everything was replaced. adjustable upper control arms, traction bars, toe bar I think it was its called, TRD sway bars with adjustable end links.
https://www.clublexus.com/forums/8343723-post502.html
https://www.clublexus.com/forums/8343723-post502.html
#15
Lexus Champion
i'm having the same issue that i haven't figured out. i have a supra auto diff in mine as well and randomly theres a squeeky grinding type of noise on the right side. the wheels and hubs dont get hot so the bearing isn't creating friction. my diff looks to be leaking so i'm gonna take it out and open it up and change the oil in it when i have a full day to work on it.