4L80 V3500 crossmember question? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigdisplay442 · 11-23-2020, 10:34 PM

I've got a 1991 V3500 DRW with the 454/4L80. My truck is almost completely stock except for the true duel exhaust, which is legal here. The pipe on the passenger side hangs down below the factory cross member and looks terrible. Almost like I ran something over and it's stuck under my truck. The cross member only has the one hump, left, and there isn't enough room on the other side, right, to safely tuck the pipe up out of sight.
My question is, Will any of the aftermarket, two hump, cross members work in a V3500 and 205/4L80 transmission? I see C10's listed and I know the frame is the same width, but nothing for a K10 or even anything about a 4x4 or even a 205/4L80. Sure I could get around to making my own. But for the sake of time and other projects, I just rather spend $150ish and be done with this detail.
I was hoping someone has done a 4L80 swap and knows what will work for this issue.
Thanks

sweetk30 · 11-24-2020, 09:02 AM

C/k 30 use a specific height cross member . So 10 & 20 truck units won't be correct height.

If you can fab go for it and weld one up .

Sounds like you have a single hump unit . There were some double jump units but hard to find . And if looking its 85-91 year range In square body trucks for the style cross member .

Also maybe check www.offroaddesign.com out . They have a LOT of stuff for our rigs .

**kwmech** · 11-24-2020, 11:58 AM

Not quite sure how that is going to work with a transfer case in the way

bigdisplay442 · 11-24-2020, 07:14 PM

Quote:

Originally Posted by sweetk30

Also maybe check www.offroaddesign.com out . They have a LOT of stuff for our rigs .

Yeah, That was one of the first places I checked. I know how the internet can get if you don't do any/enough research before asking a question. But I do appreciate the reply. It sounds like it will be a future project for me.
Thanks to both of you for replying.

83GMCK2500 · 11-29-2020, 11:15 AM

This thread has some pics, of a factory style: http://67-72chevytrucks.com/vboard/s...d.php?t=537481

11-23-2020, 10:34 PM	#1
bigdisplay442 Registered User Join Date: Nov 2015 Location: Whitehouse, Texas Posts: 21	4L80 V3500 crossmember question? I've got a 1991 V3500 DRW with the 454/4L80. My truck is almost completely stock except for the true duel exhaust, which is legal here. The pipe on the passenger side hangs down below the factory cross member and looks terrible. Almost like I ran something over and it's stuck under my truck. The cross member only has the one hump, left, and there isn't enough room on the other side, right, to safely tuck the pipe up out of sight. My question is, Will any of the aftermarket, two hump, cross members work in a V3500 and 205/4L80 transmission? I see C10's listed and I know the frame is the same width, but nothing for a K10 or even anything about a 4x4 or even a 205/4L80. Sure I could get around to making my own. But for the sake of time and other projects, I just rather spend $150ish and be done with this detail. I was hoping someone has done a 4L80 swap and knows what will work for this issue. Thanks __________________ 1966 C/10 swb LS 5.3L/4L60 1988 Chevy C/C R/30 dually LBZ Duramax conversion 1991 GMC C/C V3500 454/4L80 1993 C/2500 E/C swb 5.7L 2003 K1500HD quadrasteer C/C 6.0L 2004 K2500 quadrasteer C/C 6.0L

11-24-2020, 09:02 AM	#2
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: 4L80 V3500 crossmember question? C/k 30 use a specific height cross member . So 10 & 20 truck units won't be correct height. If you can fab go for it and weld one up . Sounds like you have a single hump unit . There were some double jump units but hard to find . And if looking its 85-91 year range In square body trucks for the style cross member . Also maybe check www.offroaddesign.com out . They have a LOT of stuff for our rigs . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

11-24-2020, 11:58 AM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	Re: 4L80 V3500 crossmember question? Not quite sure how that is going to work with a transfer case in the way

11-29-2020, 11:15 AM	#5
83GMCK2500 Registered User Join Date: Sep 2009 Location: Beaverton, OR from WA State Posts: 1,515	Re: 4L80 V3500 crossmember question? This thread has some pics, of a factory style: http://67-72chevytrucks.com/vboard/s...d.php?t=537481 __________________ Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96

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