Help front end vibration during acceleration

D

dusty619

New member
So last weekend I changed out my stock cv axles to Napa axles on my 04 v8 t4r sport.
Also added a diff drop and lowered icon coil overs1/8". Since then I am getting really bad vibrations out of the left driver side mostly only under high acceleration when the front end lifts. Did an alignment yesterday which didn't help. Yesterday removed diff drop and replaced cv axle with another new one. No change. Been reading a ton of forum posts and there seems to be many possibilites. Any help or experience with this issue would be appreciated. Me and my friends are stumped. Currently about 3" front and 2" lift in the back plus icon ucas had this set up for about 5 months with no issues.
Thinking tire rotation/balance next step before getting deeper into parts.
Thanks for looking.
 
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Do you still have the OEM CVs to compare any differences? Is there any play in or around the CV? Especially check for play where the CV goes into the front diff.
 
gm350reratliff said:
Do you still have the OEM CVs to compare any differences? Is there any play in or around the CV? Especially check for play where the CV goes into the front diff.
Click to expand...

Still have one of them. Good idea to inspect them closely. I'll look a little closer in the morning.
Thanks for the reply
 
dusty619 said:
Just did a balance and rotation no change
Click to expand...

Did you have the vibration before lowering the icons, removing diff drop, and replacing cv's?
Maybe check for worn out front hub bearings. Jack up front left/right side. Looking at the lettering side of the tire, grab the tire at the 12 o'clock and 6 o'clock position. Push in with one hand while pulling out with the other, back and forth to check for 'play' or clicking noise. (My car had clicking/play in the front left side, replaced hub bearings and all is good now)
Also you can spin the tire and listen for a bad bearing.
Compare front left and right sides.
 
Unbelievable
Put oem axle back in and it's fixed.
Going to take the other one out. Going back to oem.
Anyone know where to purchase remans?
More to come
 
regreased and clamped the one i kept that was just leaking. My other one had a boot ripped for quite a while so I stupidly trashed it last weekend. Still felt a slight vibration out of the right side mostly went away when i put the diff drop back on.
Going to get a new oem you can find them for around $300.
Going to do a write up for the forum so others don't have to go through this mess.
Thanks for all that replied.
 
I'm having this issue after I installed my OME lift from Toytec, fixed the driver side CV boot (Keep the Axel and replaced the boot) and removed all that XREAS and Stock Airbag system in the rear. Now, I'm getting a vibration from a slight to hard acceleration. It's driving me crazy. I don't know where to start... HELP!!! :yell:
 
I had this same exact issue when I installed a new Napa CV on my driver side. Heard that the Napa joint was the problem so I rebooted my original and slapped it back in. Now I’m not getting the vibration as frequently but I am still getting it when I go over big bumps and the suspension maxes out. Any idea what it might be? The bearing is relatively new so I doubt it’s that. I haven’t greased my u joints in a while but I never had something like this before I changed the CV. Hoping that the Napa junk didn’t screw something up.
 
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