Ok I got two inch lift blocks and I was wondering if it ok to stack them on top of the stock ones. thanks

 

u can.... just u gotta check ur ubolts often... i do with my 5inch lift... best way to really do it... is get a inch block thats tapered and get some superduty bubolts and crank them down and u never have to deal with them again...... are the ones u have aluminum?

 

Yeah they're aluminum

 

i had aluminum blocks and they cracked on me... i think a few other guys on here they cracked also on them :-\ its worth the extra money to get some cast iron blocks...

 

i just put aluminum blocks in mine, why do they crack?

 

They are not thick enough to put up with the stress and drive line vibrations. Look how thick the aluminum A arms are compared to the blocks.

 

how long did it take for them to crack?

 

mine took about 6 weeks.... i broke the dowel pins off and cracked them in half....

 

My buddys lowered 4 cylinder isuzu broke them in about 6 months.

 

oh wow...i just put 2" ones on and come spring time we're going to be towing the race trailer on a weekly basis. how'd you notice they were cracked?