if you adjusted your pinion angle, come in!

[CandyRedGT]

Answer is No, If you have stock 2 piece DS, I would check the center bearing.

^^^ What he said!

 

[whitedealer07]

My head hurts after trying to read all of this.

 

[one eyed willy]

Pinion angle cause a clunking in the rear between shifts? Only notice it at low RPMs really.

I can't remember when it started doing this. I'll be checking it out in the morning.

 

[one eyed willy]

1 pc DS, just measured +1.4 at the trans and -.5at the rear end. So I lowered the front of my pinion another 1 degree.

 

[AnotherS197GT]

Question relating to this:

I had LCAs with relocation brackets and an adjustable upper. I removed the LCA brackets and never adjusted my upper. I'm getting a popping sound coming from the rear. Around the same time I dismantled and checked my rear brakes, but everything was reinstalled correctly and torqued to spec. Will the adjustable upper not being adjusted right cause a popping sound? I have a stocker that I'm putting in soon, but this is making me a little nervous. I also know I have bad tie rods up front, but the sound is distinctly coming from the trunk.

 

[Fabman]

Question relating to this:

I had LCAs with relocation brackets and an adjustable upper. I removed the LCA brackets and never adjusted my upper. I'm getting a popping sound coming from the rear. Around the same time I dismantled and checked my rear brakes, but everything was reinstalled correctly and torqued to spec. Will the adjustable upper not being adjusted right cause a popping sound? I have a stocker that I'm putting in soon, but this is making me a little nervous. I also know I have bad tie rods up front, but the sound is distinctly coming from the trunk.

That popping sound is more than likely your U joints binding. This is not good. When you took the LCA brackets off it changed the pinion angle and it must now be reset.
Either set it correctly right now or put the LCA brackets back on until you can. A drive shaft coming out of the car at speed is a very ugly and dangerous thing.

 

[AnotherS197GT]

Would u joints pop while turning and accelerating? The popping only happens turning or a lateral slide. Been snowy here.

 

[Fabman]

Would u joints pop while turning and accelerating? The popping only happens turning or a lateral slide. Been snowy here.

Accelerating and decelerating is where you notice it most. Can't say about turning....maybe if the suspension is loading just right to cause a bind. Does it go "bump-bump-bump"?

 

[AnotherS197GT]

No. Just one pop. Doesn't happen under straight line acceleration. Turning or sliding only. Doesn't happen all the time either.

 

[Fabman]

No. Just one pop. Doesn't happen under straight line acceleration. Turning or sliding only. Doesn't happen all the time either.

Sounds like time for a thorough inspection of your suspenstion linkages and panhard bar. I would do that sooner rather than later.

 

[AnotherS197GT]

I shook the front end down the other day. My tie rods are going, but they aren't super awful. I haven't touched the rear end aside from the upper and lowers. I think I did have to remove a panhard bolt to remove the relocation brackets though. Would a loose PHB bolt cause a popping?

 

[Fabman]

I shook the front end down the other day. My tie rods are going, but they aren't super awful. I haven't touched the rear end aside from the upper and lowers. I think I did have to remove a panhard bolt to remove the relocation brackets though. Would a loose PHB bolt cause a popping?

It sure could.....I'd be under that baby tomorrow morning.

 

[AnotherS197GT]

Its real cold and theres a few inches of snow on the ground. I don't think I'll be doing that. I may roll up to work tomorrow and throw it on a hoist.

 

[Fabman]

Its real cold and theres a few inches of snow on the ground. I don't think I'll be doing that. I may roll up to work tomorrow and throw it on a hoist.

Good plan...hope it aint far.

 

[AnotherS197GT]

3 miles. I've been having the popping since last Saturday after I took the brakes apart though, which is really driving me nuts. I took the relo brackets off 3 weeks ago. I was also reading that the popping could be a spring or spring mount. I'm in the process of demodding my car to get rid of NVH, never figured it would make more...

 

[Fabman]

3 miles. I've been having the popping since last Saturday after I took the brakes apart though, which is really driving me nuts. I took the relo brackets off 3 weeks ago. I was also reading that the popping could be a spring or spring mount. I'm in the process of demodding my car to get rid of NVH, never figured it would make more...

I've had a spring rubbing in the pocket before....made a bunch of racket.

 

[AnotherS197GT]

Do you think removing the rear bolt on the LCAs one side at a time would have allowed enough articulation in the axle for the spring to shift?

 

[stkjock]

came across this today

http://www.wolferacecraft.com/pinionangle.aspx

 

[BMR Tech]

Here is a picture I recently drew for someone. Hope this helps!

 

[Makdaddy]

Here is a picture I recently drew for someone. Hope this helps!

I thought if the rear end or for that matter any section was up, that was a positive reading? only if it was pointing down would it be negative.

So -3.5 + +1.5 = -2 correct