Popping noise is a CV halfshaft finally....but driveshaft bouncing?

[Guerrero]

Hello again H4O members,

I recently write a thread where my 2006 Hummer h3 automatic with 70000 miles had a popping noise while turning. Well finally like Alrock and more people here said, it's a CV halshaft joint. I'll buy a replacement for that. Here i read that Cardone or OEM AcDelco (alpha's halshaft) are acceptable..but the cardone is it that good? I usually take the car to desert for long weeks and I want the most reinforcement part available but if I can save a little of money...

Well the another question, I put the car over 4 jack stands, and put it at 30 mph and look for bad parts. I found two things that I didnt like. The first one is the Front output shaft in the transfer case, that makes the front drive shaft to bounce and it seems that is not aligned. But the culprit is not the driveshaft itself, it's the output shaft. Is this normal? I refer bouncing under rotational movement like is eccentric...

The another thing that I see that is bouncing like is eccentric is the two halfshaft, the two are bouncing in the inner cv joint, again is this normal?

Thanks you so much, and sorry for so strange question, but when I put off the front driveshaft and run in two wheel drive the hummer perfoms perfect, no noises, no vibration, and all good. When the driveshaft is on, the popping noise appear (CV halfshaft bad) and I have more vibrations and a loud humming noise that appears at 30 mph and up. (I have outfitter design bushing kit for differential and steering so I assume that a little of noise is normal)

Again thanks, sorry for that questions, and happy new year!

 

[amrg]

1. With the outfitter design differential kit, you will get slight more vibes since its a more rigid mount than oem. On the Alpha the oem diff bushing used to go every 30K miles. Replaced mine with the bushing kit at 60, Im pushing 100 now and the bushing looks brand new.
2. I ran the oem cv joints, lasted me 90K miles. Replaced with oem. I run 35s, spirited driving and wheel 25 times a year in the desert, over the dunes and on the beach and I strongly believe the cv joint gave up due to sand getting in the boot (and grease that got out)

 

[Guerrero]

That's correct amrg, the delrin bushing in the front causes more vibes, but...anyone can tell me if the driveshaft bouncing like is eccentric is normal? The CV in the front driveshaft is new for Dorman and the piece is bouncing. That is normal?

 

[alrock]

The propshaft is bouncing (spinning eccentrically) coming out of the transfer case? I can't see that as normal at all.

 

[Guerrero]

Yes Alrock, I changed the CV joint in the front driveshaft and I notice that now is spinning eccentrically. I put off the driveshaft and look for the output shaft of the case spinning, and it spins correct, no eccentrically...soo I guess that the CV joint is bad (from Dorman) or the front driveshaft tube is bent or something..I dont know

Thanks you so much for responds. I notice too that both front halfshaft are spinning eccentrically too in the Inner CV Joint.

 

[Guerrero]

Soo, I put off the front driveshaft, and put it into a rotational machine, we turn it at 3000 rpm and the driveshaft is perfect, no bouncing. So I suppose that is only visually bouncing when installed into the car. Thanks you all!!!