H3 Replaced CV axles now it's hopping under a load?????

[Cyrus Avey]

So blew out a cv axle a little while back and replaced both with new ones from I think it was O'Reilly's???? Not sure. Anyways.... When I went to take it for a little test drive, when i would be real easy on it. She was fine. But would i would put her under a load, the front end seemed like it kept wanted to hop real bad..... So I lowered the front about 1.5 or 2 inches and it still does it but not as bad... Only when I slam on the skinny pedal real hard. So I was at 23.5 with the old cvs and never had an issue..... Till I went to hidden falls and blew that one bad boy out. So what I'm getting at is that, are the Cvs I got from O' Reilly's just not as good as the oem ones??? And they don't work at the angle as well at the 23.5 as the oem ones??? If y'all think that's the case, where do I get oem ones?? Or which ones should I get??


[emoji631]It's a Hummer...... That's why we bought them isn't it........???? To drive up sh*t????[emoji848][emoji631]

 

[jphh20]

I would check to see if your transfer case is locking and unlocking properly. There is a lot
Of discussion about plastic shift forks melting/breaking front heat and cycling. I am planning on pulling mine and upgrading to the metal fork as well but mine is stuck in the unlock mode.


Joe

 

[alrock]

It wouldn't surprise me if the CVs are locking up or don't have the same range as OEM. It's a bit of work, but you can pull the knuckle and see how much movement you have by moving the outer half of the axle around. It shouldn't be stiff. I recently replaced my Cardone CV for the same reason, and I think we did one for Bigunit for the same reason. OEM? Buy from any online parts dealer. Not cheap but they are good.

 

[Cyrus Avey]

Thank y'all very much for the input!!!!! I'm thinking the same, the range isn't as good as OEM.


[emoji631]It's a Hummer...... That's why we bought them isn't it........???? To drive up sh*t????[emoji848][emoji631]

 

[derian06]

I've busted 3 aftermarkets and no oem I think it has a different range of motion.

 

[Reloader]

Check your front differential mounts first. All three of them . The rear one at the pinion shaft could be a floppen up and down and the right side one takes a beaten too. May be time to give Skorpworks a call.
If transfer case is stuck in hi lock it will buck and jump whilst turning fairly sharp on pavement at slow speed with very little power applied.

 

[Reloader]

You sure it's not the ingine a hoppen around due to a destroyed motor mount? Commen on the 5 bangers.

 

[Cyrus Avey]

Motor mounts are good, my diff bushing is screwed up, but it was screwed up before I blew the cv and it wasn't doing it. I think it's a range of motion issue. Especially because it calmed down after i lowered the front a bit.


[emoji631]It's a Hummer...... That's why we bought them isn't it........???? To drive up sh*t????[emoji848][emoji631]

 

[H3nightrod]

This reminds me of one issue I had with my alpha h3.

There are two lengths of cv axels. The shorter one was the correct one for me. I had two shops working on my rig at once, neither of the two could figure out what the issue was. Everything was fine until I would push her, then front wheels seem to wobble. Finally we swapped out for the shorter cv and everything was back to normal.

 

[alrock]

This reminds me of one issue I had with my alpha h3.

There are two lengths of cv axels. The shorter one was the correct one for me. I had two shops working on my rig at once, neither of the two could figure out what the issue was. Everything was fine until I would push her, then front wheels seem to wobble. Finally we swapped out for the shorter cv and everything was back to normal.

I suspect the issue was still CVs and not the shaft length - coincidence, not cause. Every new CV assembly I've seen in the past few years (and I've see a lot) have been the extended length that started with the Alpha assemblies. It's a difference of a few millimeters and yet nothing else has changed on the H3 assemblies - same axle tubes, diffs, hubs, etc. It's not like the longer CV axle assemblies are not backwards compatible or we'd be seeing other components change in the driveline as well.

 

[rsc]

The longer CV's came about because there were a few instances of the whole CV pulling out while going around turns. I saw one myself, but it happened offroad while turning around on hardpack. The length shouldn't have any effect on the CV binding which is kinda common on the aftermarket shafts due to less travel and not overall length.

I think that if you have lowered the front end a smidge and it went away or got better then you have your answer.

 

[Hawkeye__8]

I had the same exact issue as you. I went through 3 separate CV axles before I finally found the right one at NAPA for around $140. I originally bought the CV axle at O'reillys thinking it was a fairly good deal for how cheap it was, first one that I replaced the boot tore. Then I swapped returned it and got another, then that one simply wouldn't fit. It looked different as well. I luckily got the old one back and reinstalled it (with the torn boot) because it was weekend I had to go to college:giggle:. I ordered the same new one that O'reilly had to offer, and I had the same issue where if I put it under load it would bounce/hop. Once I installed the one from NAPA I had no issues.