weld chevy dif?

ok i see people not weld them and them im not sure but somewhere i seen that someone said they could be welded...and another question is on a tri link do the bars have to be the same lenght and whats the min angle they can be at? and do the bars have to be adjustable?

There have been threads on all of your questions within the last 6 months or so. I would have no problems answering them, but there is a lot more to it than a simple answer. Do a search then I will try to answer any of the questions that you have left.

Dont want to step on Max's toes here but I will see if I can help you out a little....

Chevy Diff and welding.... chevrolet differentials also known as GM CORP axles 10 bolt, 12 bolt and 14 bolt, they all have a cast steel center section. Welding to cast steel is a highly specialized area and should ONLY be done by those who are certified to do that. And even in that case, I still wouldnt do it. The popular Ford 9" is an all steel housing like the EARLY gm's and can be welded on directly on the third member housing.

Tri-link bars and lengths.... It is kind of like Coronel Sanders secret recipe. Everybody has their own formula alot which of alot of the ones I have seen out there are nothing more than mearly a guess but in short, no your upper and lower bars do not need to be the same length. As far as the angle is concerned, there is actually a formula to use that will achieve a proper upper bar length and angle but we will be right back to the whole secret formula crap. What I can add though is that you have to make sure that you have enough angle on your upper bars in order to isolate lateral movement. I personally wouldnt consider going under 35 degrees.

bars / adjustable.... no they dont HAVE to be adjustable. In fact GM has been building non adjustable link bars for decades. In my opinion though, I would make one end adjustable. That way you have adjustment possibility (ie. pinion angle, alignment, axle center) after it is welded in. If you have a fixed bar guess what... you are stuck with what ya got!

You're not stepping on my toes at all, everyone is welcome to help out here. Understand though that everything that you just posted has been addressed in great lengths in another forum. If I were to answer every new question as throughly as they should be, I would never get anything done.