I have a loud grinding noise for about 3-5 seconds at times on deceleration. Not pre-load issue on pinion or crush bearing. Can feel it in the floor board. New bearings installed (inner & outer) on the front and "new" 3rd member installed on front-all within last 3 weeks. Started after this. Work done by mechanics, not me. Almost sounds like an impact wrench, but a lower pitch. Suggestions?
Rattle/Grind in front end on deceleration
- Thread starter Bwhnter
- Start date
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ewillis
SILVER Star
Dry spindle bushing
inkpot
SILVER Star
Dry ujoints
Willis, is correct, I'll bet you money when you pull it apart, your going to find that your mechanic forgot to grease those spindle bushings! Oh one more thing, i wouldn't run it long like that, IIRC those spindle bushings from Toyota are over 100 bucks each, and they won't last very long being run dry.
Below is a photo of the bushing from Cruiser outfitters, they get 97.50 each for the factory Toyota bushings.
Fits 1/1990-12/1997 8x Series & LX450 w/Solid Brass Bushing:
Part# HUB33002 (Aftermarket) - $15.50/each
Part# HUB33001 (Toyota) - $97.50/each
(One bushing required per side, two per axle)
Those bushings fit on the inboard side of your spindle, here's a photo of your spindle.
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Could be either one. However, since the front axle was just rebuilt, that's the most likely culprit. However, the dry U-Joints are the easiest and fastest and cheapest to check first.
Have them greased and see if it eliminates or changes the noise. If not, then consider changing them. THEN dig into the front axle again if still not solved.
Did you do a lift at the same time?
Have them greased and see if it eliminates or changes the noise. If not, then consider changing them. THEN dig into the front axle again if still not solved.
Did you do a lift at the same time?
LINUS
Waiting for the Great Pumpkin
Where my mind went w/ the 3rd member, like a lift & regear scenario.
If so, even a OME Heavy or J's will be enough to get a little noise a DC fr shaft solves.
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Or not, have seen a DC shaft not solve the problem on relatively mild lifts. Have seen simply changing it to in-phase reduce or eliminate the vibe.
Agree with lubing as the first check. Is the moly level in the knuckles correct? If not adding, bringing the level up, will lube the birf and bushing. Greasing the u-joints is a good test, can confirm or eliminate driveshaft issues. At the same time, check for play in the u-joints, confirm shaft phase, if the thirds have been out, the shaft also was, how did they put it back in?
LINUS
Waiting for the Great Pumpkin
+1 to lube as 1st check/fix, not recommending throwing $$ @ a DC shaft until all other (cheaper) options exhausted.
I've never swapped a DS phase, full honesty - never had to go to that length in fixing a situation, but my last lift was to a 4" Slee heavy, so I fell squarely in DC fr shaft zone & just bought one from the jump.
@OP - are you lifted at all, and if so what method are you using for caster correction?
Did the 'grrrr' start only after the 3rd was swapped, bearings changed?
Or was there a minor/similar issue beforehand?
I've never swapped a DS phase, full honesty - never had to go to that length in fixing a situation, but my last lift was to a 4" Slee heavy, so I fell squarely in DC fr shaft zone & just bought one from the jump.
@OP - are you lifted at all, and if so what method are you using for caster correction?
Did the 'grrrr' start only after the 3rd was swapped, bearings changed?
Or was there a minor/similar issue beforehand?
I just installed 850J's and 863J's with L shocks and am experiencing the same issue. I don't have caster correction yet. I'm going to correct the caster first to see if it stops it. I agree with checking the least expensive options first before anything else.
Just ordered the plates. Once installed, I will order the DC shaft. Thanks for your help!!
I have the same noise and still haven't tracked down the cause yet.
- Thread starter
- #13
I've checked the u-joints and they are OK. I did a 2" lift and had the caster adjustment made. Still trying to find the problem. Back at the shop. Will update. New to this site, but LOVE it. Thanks for all the responses!!!
If you did a lift at the same time, I'll bet money on the U-Joints because it changes the angles of how and where they run and it has to create a new wear pattern so you get a vibration/grind/growl/whine from the u-joints.
Good Luck!
Good Luck!
Aren't the drive flanges known to make a similar noise when they get some wear on them?
BlueCruiser84
SILVER Star
I have the "same" noise as well, but I'm 75% confident it's the spindle bushing. My front DS birf has been slowly weeping gear oil for about a year now and I think it's finally diluted the grease enough to cause some Noise between the birf shaft and the spindle bushing.
Does fresh, non-diluted with gear oil grease, provide a cushion between the birfield shaft and the spindle bushing in a mechanically sound front end?
Does fresh, non-diluted with gear oil grease, provide a cushion between the birfield shaft and the spindle bushing in a mechanically sound front end?
Box Rocket
SILVER Star
When you add moly to the knuckles are you just adding through the square plug or disassembling the knuckle? Proper quantity of moly in the knuckle will lube the spindle bushing, correct?
can you point me to (or describe how to) set the DC shaft to "in-phase" or "out of phase"? Pretty sure mine is in phase but I want to check and try the change to see if it help eliminate a coasting vibe I've been chasing for a while.
TIA
I may have the same thing but would describe it as a shudder. However, I noticed while in park and revving the engine up to 1500rpm to check the generator/alt.
When I would let go, I'd hear a quick shudder. That makes me think not spindle bushing so I will start by lubing driveshaft? Just wondering if anyone else has had a similar experience.
When I would let go, I'd hear a quick shudder. That makes me think not spindle bushing so I will start by lubing driveshaft? Just wondering if anyone else has had a similar experience.
If you're in park and it is happening, it is not driveshaft related. Most likely would be engine related....
Oops, good catch, you're right. Huh I'll do some reading on here and see if anyone has experienced similar.
