New CV joint boot tore

[woodwardsh3]

What would cause a new CV joint boot to tear with less then 200 quite miles ?
Front axle center mount looks intact How much movement should it have with 8'' pry bar under the pinion? It moves about 1/2''
I have not checked the outer bushing on the front axle or the Transfer Case mount, is there anything I am missing.:whaa:
Thanks for your help.
The last one lasted about 1 year.

 

[alrock]

New boot installed on an existing CV or new assembly? Was it something sitting in storage for a long time or newly purchased from a store? Either way, it could just be a defect or maybe even dried out rubber. Or nicked upon install. You could also put some RTV on the tear to reseal it if it's not bad. Obviously clean the surface first.

I haven't had a boot tear in years. I don't see a tear coming from play in the bushings. But to answer that question - if you have an OEM crossmember bushing, a half inch of movement could be reasonable but that movement should be restrained by the rubber bushing. Free, unrestricted movement would suggest that the bushing is torn, or wearing out.

The last thing I'd say is that if you have the torsion bars cranked too high or have too much vertical movement in the CV you could be overstretching them. But I suspect you'd feel some binding in the CVs as well if that were the case.

 

[woodwardsh3]

The prop shaft cv was bought new and it was the AAM OEM brand. It tore about a 1 3/4'' long straight tear front to back but not at the clamp. T bar height is 23.1/4 left and right is 23 1/2

 

[4speedfunk]

Are you running a Rancho kit? That's the only thing that would effect the boot on the front prop shaft. A T-bar crank is irrelevant to the prop shaft angle, and it only effects the halfshaft cv's.

 

[woodwardsh3]

No lift . Maybe I just bought old stock or defective.
I will remove it tomorrow, and call the place of purchase and see what they say. I just wanted to be sure I was not missing something that was causing the problem.
Thank you.

 

[alrock]

Ahh, prop shaft CV. Sorry, I thought you meant axle CV. Maybe I should read more carefully.