Rear Diff clutch plates installed incorrectly from factory
Apr 13, 2015, 03:58 AM
#334
Need help
I read the whole forum and sorry if I missed on reading something but I did the 12 disc, and after noticed a clunking noise when turning only, in gear or clutch pressed, still present when going 15-20 mph on a turn but not as bad at lower speeds. And when I say u can hear it, it's pretty hard to miss the noise as to it kinda seems embarrassing driving it a little when turning cuz it's more on the loud side. I use the amsoil gear oil. I did the repair myself, I am a mechanic and this is my first evo diff but I've done one on another vehicle before. It seems like something in the spider gears but I can figure out exactly what. I'm gonna try using diaqueen oil and see if that helps since the people who do use it say they don't have any noise. I did take it apart a second time just to make sure if I haven't don't something correctly but everything was ok. Here's a video
Last edited by Spòóf-7; Apr 15, 2015 at 03:40 AM.
Apr 13, 2015, 03:25 PM
#336
So it's normal being that loud? When people would mention it I thought it'd be a quiet clunking sound, but I swapped out the rear diff fluid with the diaqueen from the dealer and made it a little better, not as loud. Will drive it more through out the week and see what happens. I'm also getting a tune for it at Ivey Tune in NJ and I'll ask them about it incase if I missed any info.
Apr 13, 2015, 04:05 PM
#337
Hey there, I am no expert, but I have redone several stock rear diffs, and installed two different aftermarket ones. All with varying amounts of click or clunk. None of them have ever sounded like that. To be honest the first thing that jumped to my mind listening to that is that you have something else clicking or rubbing, not the diff, that is giving you that sound. Something that got moved or changed during the work. However, if you are certain its coming from the rear, then that should be unlikely.
If you can see if you can recreate the sound with the car jacked up in the rear. Lock one wheel with a pry bar, and have a friend forcibly turn the other wheel to engage, by force, the diff plates. Essentially proving or isolating the sound of the diff and what should be the diff plates skipping over each other. I would expect a sound from plates that have never worn even a bit, but not that sound. Maybe the camera audio is fooling me, but that is my 2 cents based on all the noises I have had with my evo.
If you can see if you can recreate the sound with the car jacked up in the rear. Lock one wheel with a pry bar, and have a friend forcibly turn the other wheel to engage, by force, the diff plates. Essentially proving or isolating the sound of the diff and what should be the diff plates skipping over each other. I would expect a sound from plates that have never worn even a bit, but not that sound. Maybe the camera audio is fooling me, but that is my 2 cents based on all the noises I have had with my evo.
Apr 13, 2015, 09:21 PM
#338
Hey there, I am no expert, but I have redone several stock rear diffs, and installed two different aftermarket ones. All with varying amounts of click or clunk. None of them have ever sounded like that. To be honest the first thing that jumped to my mind listening to that is that you have something else clicking or rubbing, not the diff, that is giving you that sound. Something that got moved or changed during the work. However, if you are certain its coming from the rear, then that should be unlikely.
If you can see if you can recreate the sound with the car jacked up in the rear. Lock one wheel with a pry bar, and have a friend forcibly turn the other wheel to engage, by force, the diff plates. Essentially proving or isolating the sound of the diff and what should be the diff plates skipping over each other. I would expect a sound from plates that have never worn even a bit, but not that sound. Maybe the camera audio is fooling me, but that is my 2 cents based on all the noises I have had with my evo.
If you can see if you can recreate the sound with the car jacked up in the rear. Lock one wheel with a pry bar, and have a friend forcibly turn the other wheel to engage, by force, the diff plates. Essentially proving or isolating the sound of the diff and what should be the diff plates skipping over each other. I would expect a sound from plates that have never worn even a bit, but not that sound. Maybe the camera audio is fooling me, but that is my 2 cents based on all the noises I have had with my evo.
Apr 14, 2015, 11:03 AM
#339
Drove it this morning and turning when the rear diff fluid is still cold, aprox. 50*F, it didn't make the noise at all but as soon as I got of the highway after a 35min drive it came back.... You think maybe the additive would make a difference or if I should even try that?
Apr 14, 2015, 11:34 AM
#340
My 12-plate Weir makes similar, but not as frequent, sounds as yours Spoof. It only does it when fully warm, turning left, and at parking lot speeds. It took ~1yr and 3k miles before mine started. I have flushed fluid and there was nothing out of the ordinary. I was thinking of trying a friction modifier just to see if the sound goes away or stays. I really just need to drop the diff and inspect everything.
Apr 14, 2015, 12:29 PM
#342
EvoM Guru
iTrader: (1)
Sounds normal. My restacked diff is pretty loud..
Apr 14, 2015, 08:06 PM
#345
Yes I have soaked the disc's before assembling it back together. Also yes I have just recently switched my fluid to diaqueen. Got the same results but seems to be a little better. But does anyone have recommendations if I should add a friction modifier additive, or just wait a couple 100 miles? Curious