Subcribed. This sounds all too familiar after installing my Nitro 5.29s on a Slee 4" front, 863J rear lift.
new gears, bad vibs and whine??
- Thread starter TexasD90
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If I may?
From reading the first post, it sounds to me as if two things were done: 1) Rebuild of the front axle and 2) Installation of new gears in both 3rds. Nothing else if I read correctly. So, the front pinion should be in almost EXCATLY the same place, in relation to the drive shaft, as it was before all this work. The issue is noise and vibration, most probably not related to either drive shaft or the transfer case, assuming installation of the two thirds was done correctly and the front axle re-assembly was also done correctly.
I did mostly gear changes during the 10 years I owned my shop (in the Dallas area) and used Nitro for the last four or so of those 10 years. Prior to that, I was a professional tech for almost 20 years, with the last dealership position at a Lexus franchise in Dallas.
I think your setup is faulty. Nitro gears are generally easy to set up and I naver had any issues with break in. Your break in procedure sounds exactly like what I used to tell my customers to follow, which worked for me.
The only other issue I can imagine is a physical interference between the substantially thicker new ring gear and something in the housing, not unheard of.
Re. the leaking rear pinion: Nitro uses an aftermarket seal in their install kits that bit me a couple of times. I got to where I would keep OEM seals around and pass on Nitro's part.
Feel free to e-mail me, offroadwine@yahoo.com I check personal e-mails a lot more frequently than I can get on Mud.
From reading the first post, it sounds to me as if two things were done: 1) Rebuild of the front axle and 2) Installation of new gears in both 3rds. Nothing else if I read correctly. So, the front pinion should be in almost EXCATLY the same place, in relation to the drive shaft, as it was before all this work. The issue is noise and vibration, most probably not related to either drive shaft or the transfer case, assuming installation of the two thirds was done correctly and the front axle re-assembly was also done correctly.
I did mostly gear changes during the 10 years I owned my shop (in the Dallas area) and used Nitro for the last four or so of those 10 years. Prior to that, I was a professional tech for almost 20 years, with the last dealership position at a Lexus franchise in Dallas.
I think your setup is faulty. Nitro gears are generally easy to set up and I naver had any issues with break in. Your break in procedure sounds exactly like what I used to tell my customers to follow, which worked for me.
The only other issue I can imagine is a physical interference between the substantially thicker new ring gear and something in the housing, not unheard of.
Re. the leaking rear pinion: Nitro uses an aftermarket seal in their install kits that bit me a couple of times. I got to where I would keep OEM seals around and pass on Nitro's part.
Feel free to e-mail me, offroadwine@yahoo.com I check personal e-mails a lot more frequently than I can get on Mud.
now that you mention it I've had to grind the housing for interference issues with the taller ring gear on my installs.
It's always worth checking......
Any resolution here?
Buehller?
my solution for the same issues
I installed 4.88s two years ago. Im running on 850/863 springs with MAF 30 mm front spacers and the yellow caster bushings from OME. Never measured my numbers but judging by the slight wandering on uneven roadways im sure im several degrees off of spec. Plan to install stock bushings and plates one day.
Had bad vibes and noise on deceleration. Had a junkyard TacomaDC shaft built for the front and noise significantly reduced. Went back to the wheel bearings and changed the synthetic grease out for the cheap dinosaur variety. The synthetic stuff was separating oosing a light weight liquid from my grease gun I had been using for the shafts. It still vibes periodically above 75mph. (I'm on 315/75r16 Duratracs)
I installed 4.88s two years ago. Im running on 850/863 springs with MAF 30 mm front spacers and the yellow caster bushings from OME. Never measured my numbers but judging by the slight wandering on uneven roadways im sure im several degrees off of spec. Plan to install stock bushings and plates one day.
Had bad vibes and noise on deceleration. Had a junkyard TacomaDC shaft built for the front and noise significantly reduced. Went back to the wheel bearings and changed the synthetic grease out for the cheap dinosaur variety. The synthetic stuff was separating oosing a light weight liquid from my grease gun I had been using for the shafts. It still vibes periodically above 75mph. (I'm on 315/75r16 Duratracs)
did the installer use solid spacers? I ask, because when my 4.88's were installed, I had Nitro solid spacers front and rear, and the guy didn't use the right shim stack, so both diffs were growling within 100 miles. I eneded up rebuilding them my self. Fortunately the gears were still in good shape and I only had to repelace the pinion bearings on both diffs (along with a proper shim set).
- Thread starter
- #30
The shop that built my thirds now has the whole truck. He has it all apart and says everything is within spec. He is setting the pinion gears a hair deeper and putting a new pinion seal in the rear. Was working on putting if back together this evening. He said he'd call tomorrow and let me know. Said if its still making noise he is going to get nitro to send a new set of gears. I'll keep you posted...
- Thread starter
- #32
Ok, here's the deal.....
They have taken everything apart and it is all in spec. Seated the pinion a little deeper and put it all back together. While on the rack they ran it and listened to it. He says the grinding noise is coming from the transfer case. I have no reason not to believe him, but want your opinions. The truck never made the noise one time before the gears. Now it makes it every time you decelerate. What do you think???
They have taken everything apart and it is all in spec. Seated the pinion a little deeper and put it all back together. While on the rack they ran it and listened to it. He says the grinding noise is coming from the transfer case. I have no reason not to believe him, but want your opinions. The truck never made the noise one time before the gears. Now it makes it every time you decelerate. What do you think???
I can't remember the beginning of this saga but noise on decel usually means drive shaft.
Don't recall the cost of the bearings, but nothing OE is cheap.
Swapped front and rear at the same time the lower gears went in, which this would be an ideal time to do, while you're in there.
I ordered these bearings today to fix the same issue and I believe for the bearings and some seals for the transfer case it was just shy of $100. That's the front and rear bearings. They were $25 and $20 or something like.
Think Onur had a lengthy one. Not sure if it involved PT, but recall reading.
Edited: beno, not Onur.