Noise from the rear - Page 2 - ZR-1 Net Registry Forums

SharkPilot · 08-20-2009

It's been a busy week so not much time in the garage. I did run the car on the stands though. There was no noise in 1st or 2nd gears so up to 4th it went. Then I could here a distinct clicking sound that sounded like it was resonating in the left half shaft. I listened to both hubs with my stethiscope and they both sounded smooth and quiet. More importantly... they sounded the same. Right now I'm going after u-joints. All six of them will get replaced.
I can't find a spec for wheel bearings in the FSM. Jeff, the .005" that you refer to, is that the hub endplay or the 'slop' out at the shoulder of the tire? .005 out at the end of the tire sounds awfully tight to me but you guys know more about this than me. Shark rear bearings have some motion but those are the old fashioned packed and stacked bearings.
I do appreciate the help from all of you. In 25+ years of Shark ownership there isn't much I haven't fixed, rebuilt, starred at or just simply tripped over. With a C4 I'm back down the learning curve a bit. There's always more to learn.

jonszr1 · 08-20-2009

if you are going to replace the u joints get the 800 series spicers, they are non greaseable . i really think your problem is u joints

SharkPilot · 08-31-2009

It's all fixed!

One of the u-joint cups on the left outboard end was full of nothing but rusted particles and dust. The odd thing is that all of the others on both shafts were fine and smooth with plenty grease remaining. So that one must have had something happen to its seal sometime during installation or???

Once again, thanks for all of your help.

SharkPilot

rhipsher · 09-01-2009

Good deal. Yep when they go they go and it looks ugly.

08-20-2009	#11
SharkPilot Join Date: Aug 2005 Location: Anaheim, California Posts: 105	Re: Noise from the rear It's been a busy week so not much time in the garage. I did run the car on the stands though. There was no noise in 1st or 2nd gears so up to 4th it went. Then I could here a distinct clicking sound that sounded like it was resonating in the left half shaft. I listened to both hubs with my stethiscope and they both sounded smooth and quiet. More importantly... they sounded the same. Right now I'm going after u-joints. All six of them will get replaced. I can't find a spec for wheel bearings in the FSM. Jeff, the .005" that you refer to, is that the hub endplay or the 'slop' out at the shoulder of the tire? .005 out at the end of the tire sounds awfully tight to me but you guys know more about this than me. Shark rear bearings have some motion but those are the old fashioned packed and stacked bearings. I do appreciate the help from all of you. In 25+ years of Shark ownership there isn't much I haven't fixed, rebuilt, starred at or just simply tripped over. With a C4 I'm back down the learning curve a bit. There's always more to learn.

08-20-2009	#12
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Noise from the rear if you are going to replace the u joints get the 800 series spicers, they are non greaseable . i really think your problem is u joints

08-31-2009	#13
SharkPilot Join Date: Aug 2005 Location: Anaheim, California Posts: 105	Re: Noise from the rear It's all fixed! One of the u-joint cups on the left outboard end was full of nothing but rusted particles and dust. The odd thing is that all of the others on both shafts were fine and smooth with plenty grease remaining. So that one must have had something happen to its seal sometime during installation or??? Once again, thanks for all of your help. SharkPilot

09-01-2009	#14
rhipsher Join Date: Aug 2008 Location: Houston 90 Red ZR-1 Posts: 2,320	Re: Noise from the rear Good deal. Yep when they go they go and it looks ugly.