4x4 LS cross member
 

Ok I asked this in the 4x4 section with no response. Can anyone shed some light on which cross member to use.
This is the original thread with the links.

http://67-72chevytrucks.com/vboard/s...d.php?t=661468

Re: 4x4 LS cross member
 

I remember a thread of someone using the PF member and had to barely trim it for clearance. Not sure about the DD.

Re: 4x4 LS cross member
 

Thanks for the comment!
Anyone else have a history with one of the LS cross member mounts in a 4X4?

Re: 4x4 LS cross member
 

I used the dirty dingo setup. I used it because i was in a hurry, and didn't feel like fabbing anything up.

http://imageshack.com/a/img716/2994/x1rv.jpg

http://imageshack.com/a/img843/9224/oexs.jpg

http://imageshack.com/a/img689/4122/iqyf.jpg

http://imageshack.com/a/img823/7886/erzk.jpg

Re: 4x4 LS cross member
 

Wasted, did you have to move the engine forward at all to clear the cab? I am basically doing the same thing you did to your 69lwb.

Re: 4x4 LS cross member
 

I initially positioned it to clear the factory AC compressor...so it's really far forward in the frame. There is a TON of room between the engine and firewall. It's actually kind of nice for working on stuff back there.

http://imageshack.com/a/img829/1424/guqg.jpg

Re: 4x4 LS cross member
 

I read that the PF won't work with a stock height truck. The mount hits the oil pan. It will fit but it leaves no room for suspension travel. True???

Re: 4x4 LS cross member
 

Did you relocate the crossmember or just slide the dd motor mounts forward?


Gmc,
from all I have read either mount will NOT work well with a stock height truck. I think minimum 2" lift is needed.

Re: 4x4 LS cross member
 

I still don't understand why the motor sits so low in a 4x4 Compared to a 2wd. Or at least that is what most have said in there builds.

Re: 4x4 LS cross member
 

I was thinking it doesn't sit lower, but that the pumpkin on the axle would hit the pan? Could be wrong though. Would an f body pan help anything, you think?

Re: 4x4 LS cross member
 

I've read the pan seems to be ok. Fbody pan would give me peace of mind but it's the cross member that actually hits on the diff. Everything I read says to install a 2" lift.

Re: 4x4 LS cross member
 

I did have to do some grinding on the DD mount to clear the truck oil pan. Kind of annoying grinding on laser cut parts...

Between being able to slide the DD slider mounts, and sliding the crossmember where I needed to in the frame, I put the engine exactly where I wanted it, then drilled new holes in the frame.

Re: 4x4 LS cross member
 

Great thank you! did you get the crossmember powder coated from DD or had it coated after you test fitted it? That would suck to have it powder coated first and having to grind on laser cut powder coated parts!!!

thanks for the info and ideas guys
Scott

Re: 4x4 LS cross member
 

FYI, this is some information sent to me from cmabolt "Thanks Chris"

Originally Posted by cmabolt
Hello, I just wanted to write you regarding your interest in the LS crossmembers. I didn't want to highjack Dwilber's Build thread.

I used the pacific fab crossmember only because Dirty Dingo didn't have theirs on the market yet for 4x4's. Pacific Fab's crossmember is an extremely well built piece. Very strong. I put it in place and aligned it where the original motor mounts were. I then dropped the cab and found that the rear passengers side valve cover was hitting the firewall. I did some research and found that others had moved the motor forward to make some space between firewall and motor. I moved my crossmember forward 2" which gave me nice clearance in front of the firewall and plenty of room up front for an electric fan.

The dirty dingo crossmember looks to be well engineered as well. I think it's cheaper too. If I we're to do it again, I would probably go with the dirty dingo crossmember. One benefit is that you can actually drop the center section of the crossmember to remove the oil pan. This is not available on the pacific fab crossmember.

In conclusion, they are very similar in design, but I am sure dirty dingo has the advantage as they probably engineered theirs to take advantage of the shortcomings of the pacific fab unit. That's what I would do. If you plan to do headers or use a manual trans with hydraulic setup see my build thread or 69Crash. We both used pacific fabs crossmember. 69crash used an automatic and I used a manual trans. I used headers and he used manifolds. A ton of info on both builds.

Good luck, I hope this helps you make a decision.
Chris

Re: 4x4 LS cross member
 

OK so price before shipping for each
Pac Fab 419.00 Shipping $16.74 but are 50 minutes away from me.
DD 455.00 Shipping $18
thoughts???

Re: 4x4 LS cross member
 

Oh, that's my other gripe. I paid extra to have the DD stuff PC'd by them before shipping.

What a joke. That **** started flaking off the sharp edges right away....I wish I'd just taken them to the same guy that did the frame...probably wouldn't have cost me any more, for a far superior job.

Re: 4x4 LS cross member
 

So are you going to lift it, or buy the member and see where the engine sits? I'm in the same boat, you can go ahead and be the guinea pig! LOL

Re: 4x4 LS cross member
 

Wasted, I figured you were going to say that!!!
Gmc
Check out my build thread in my signature. Yes I plan to lift it 4 inches. I talked to John at Pacific fabrication they are about 50 minutes from me. I may go talk to them and check out the crossmember before I buy anything. I am thinking about buying the pacific fabrication crossmember and cutting it or adding a removable center section under the oil pan.

Re: 4x4 LS cross member
 

Scott i would go with dirty dingos cross-member if you are not able to build your own it would be quite simple. Myself got the pacific fab because it was dang near 150 cheaper... Big mistake... Both me and chris (Reno build) experienced the motor mounts not lining up, he didn't have it as bad as i did i had to weld an extension to the top on both sides. Once i got it bolted in i noticed one mount was twisted. I would not want anyone to have something like this.

Re: 4x4 LS cross member
 

Subbed

Re: 4x4 LS cross member
 

Thanks Lance for the info. I was also thinking of possibly making my own. Do you know of anyone that has?

Re: 4x4 LS cross member
 

I built my own. Mostly because the pacific fab one was the only thing available and i didn't like the price tag or the looks of it. It was actually pretty simple i just set the engine in the frame where i wanted it to go and built it from there. There is a couple more pictures on the first page of my build thread.

Re: 4x4 LS cross member
 

Going to look at your build thread now but are you lifted?

Re: 4x4 LS cross member
 

Yes. I have a 4" lift. But I am pretty sure that it would clear the pumpkin even if it was not lifted because of how far back the engine sits with the 4l60e and the 205 in the stock position.

Re: 4x4 LS cross member
 

Hey jimmy any more pictures installed?