Transmission Crossmember - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMC Guy · 03-10-2011, 08:21 PM

I'm about to have my exhaust done (the right way) and i really want to replace the transmission crossmember i have with one that is more "duel exhaust friendly"
i don't want to pay a shop to route pipe over and under the crossmember i have, just not as clean looking.
i've attached a picture of what i'm after, the way the pipe is routed is exactly what i want. *thanks for letting me use your pic as an example*
what year/model trucks came with this style crossmember? i'd really like to know so i can search the juckyards high and low for one. thanks

GMC Guy · 03-11-2011, 05:49 AM

no one knows?

gchemist · 03-11-2011, 11:53 AM

You can look under a 3/4 or 1 ton truck for dual hump crossmember. Trucks in the 70's and maybe early 80's had them.

Best option, make your own. I had one made for my truck. It tucks the exhaust nice up to the underside.

GMC Guy · 03-11-2011, 12:08 PM

i do like the look of yours a lot, but i doubt i can afford to have one made...

and i don't have the tools or skills to tackle that myself. but a few bolts on the other hand, i can handle that

lindstromjd · 03-11-2011, 12:11 PM

Is an old C3 Corvette (71-81) crossmember an option? They have holes in them designed for the exhaust to go through them instead of over or under. Just a thought.

GMC Guy · 03-11-2011, 12:15 PM

but would it bolt up between the frame rails? and where could i even find one? don't think i've ever seen a vette at a junk yard lol

lindstromjd · 03-11-2011, 12:19 PM

I honestly don't know... I'd have to crawl under my vette to see what the dimensions between the subframe rails are. Most vettes will be parted out before they ever see a junkyard. The Corvette forums are really helpful with guys parting them out though...

bigblock73 · 03-11-2011, 12:57 PM

the early squares had a flat trans crossmember with small dimples to allow the exhaust to run under. Take a peek under a 73, 74, 75 or so 1/2 ton 2wd...they have them.

GMC Guy · 03-11-2011, 01:41 PM

thanks, i'll be on the look out

KrazyRay · 03-12-2011, 10:40 PM

Quote:

Originally Posted by bigblock73

the early squares had a flat trans crossmember with small dimples to allow the exhaust to run under. Take a peek under a 73, 74, 75 or so 1/2 ton 2wd...they have them.

One of them went up your way

bigblock73 · 03-12-2011, 10:48 PM

Quote:

Originally Posted by KrazyRay

One of them went up your way

It did, thank you very much. I am going to section that one to lower my trans a little bit. If that does the trick, then the one IN my truck will be for sale.

texasbigbear_wink · 03-12-2011, 11:48 PM

They have some at Summit.

GMC Guy · 03-13-2011, 01:55 AM

Quote:

Originally Posted by bigblock73

It did, thank you very much. I am going to section that one to lower my trans a little bit. If that does the trick, then the one IN my truck will be for sale.

you have one like the truck i pictured? if so, i'll send you a pm

motornut · 03-15-2011, 11:30 AM

my 4X4 78 jimmy has one they both go over duno if thats an option for a 4X2

Slonaker · 03-15-2011, 12:30 PM

I bought one for my truck in a junkyard. It came off a 70s heavy half or Big10. I have had it for 4 or 5 years, and it still isn't under my truck. I just moved it from the old house to the new one over the weekend...

Slonaker

silvereagle07 · 03-15-2011, 12:43 PM

Here's a tube kit from suicide doors. It sales for $69.

killerpickup · 03-15-2011, 01:31 PM

I noticed you still have the long tube headers. I found that changing to a mid length header I was able to route the pipes above the crossmember with no problem. killerpickup

03-10-2011, 08:21 PM	#1
GMC Guy Registered User Join Date: May 2009 Location: Sparks, NV Posts: 913	Transmission Crossmember I'm about to have my exhaust done (the right way) and i really want to replace the transmission crossmember i have with one that is more "duel exhaust friendly" i don't want to pay a shop to route pipe over and under the crossmember i have, just not as clean looking. i've attached a picture of what i'm after, the way the pipe is routed is exactly what i want. thanks for letting me use your pic as an example what year/model trucks came with this style crossmember? i'd really like to know so i can search the juckyards high and low for one. thanks Attached Images __________________ Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__ ............._____l __\__ ..............l_(O)_ l___(O)]

03-11-2011, 05:49 AM	#2
GMC Guy Registered User Join Date: May 2009 Location: Sparks, NV Posts: 913	Re: Transmission Crossmember no one knows? __________________ Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__ ............._____l __\__ ..............l_(O)_ l___(O)]

03-11-2011, 11:53 AM	#3
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Transmission Crossmember You can look under a 3/4 or 1 ton truck for dual hump crossmember. Trucks in the 70's and maybe early 80's had them. Best option, make your own. I had one made for my truck. It tucks the exhaust nice up to the underside. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-11-2011, 12:08 PM	#4
GMC Guy Registered User Join Date: May 2009 Location: Sparks, NV Posts: 913	Re: Transmission Crossmember i do like the look of yours a lot, but i doubt i can afford to have one made... and i don't have the tools or skills to tackle that myself. but a few bolts on the other hand, i can handle that __________________ Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__ ............._____l __\__ ..............l_(O)_ l___(O)]

03-11-2011, 12:11 PM	#5
lindstromjd Gentleman Jim owner x2 Join Date: Oct 2010 Location: West Des Moines, IA Posts: 464	Re: Transmission Crossmember Is an old C3 Corvette (71-81) crossmember an option? They have holes in them designed for the exhaust to go through them instead of over or under. Just a thought. __________________ 1975 GMC Gentleman Jim #1 -357 / 700r4 1975 GMC Gentleman Jim #2 -350 / TH350

03-11-2011, 12:15 PM	#6
GMC Guy Registered User Join Date: May 2009 Location: Sparks, NV Posts: 913	Re: Transmission Crossmember but would it bolt up between the frame rails? and where could i even find one? don't think i've ever seen a vette at a junk yard lol __________________ Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__ ............._____l __\__ ..............l_(O)_ l___(O)]

03-11-2011, 12:19 PM	#7
lindstromjd Gentleman Jim owner x2 Join Date: Oct 2010 Location: West Des Moines, IA Posts: 464	Re: Transmission Crossmember I honestly don't know... I'd have to crawl under my vette to see what the dimensions between the subframe rails are. Most vettes will be parted out before they ever see a junkyard. The Corvette forums are really helpful with guys parting them out though... __________________ 1975 GMC Gentleman Jim #1 -357 / 700r4 1975 GMC Gentleman Jim #2 -350 / TH350

03-11-2011, 12:57 PM	#8
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Re: Transmission Crossmember the early squares had a flat trans crossmember with small dimples to allow the exhaust to run under. Take a peek under a 73, 74, 75 or so 1/2 ton 2wd...they have them. __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale

03-11-2011, 01:41 PM	#9
GMC Guy Registered User Join Date: May 2009 Location: Sparks, NV Posts: 913	Re: Transmission Crossmember thanks, i'll be on the look out __________________ Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__ ............._____l __\__ ..............l_(O)_ l___(O)]

03-12-2011, 11:48 PM	#12
texasbigbear_wink Registered User Join Date: Oct 2009 Location: Texas Ellis county Posts: 134	Re: Transmission Crossmember They have some at Summit. __________________ 87 Chevy R10 LB 02 Nissan Sentra GXE Last edited by texasbigbear_wink; 03-13-2011 at 12:03 AM.

03-15-2011, 11:30 AM	#14
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Transmission Crossmember my 4X4 78 jimmy has one they both go over duno if thats an option for a 4X2 Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

03-15-2011, 12:30 PM	#15
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: Transmission Crossmember I bought one for my truck in a junkyard. It came off a 70s heavy half or Big10. I have had it for 4 or 5 years, and it still isn't under my truck. I just moved it from the old house to the new one over the weekend... Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

03-15-2011, 12:43 PM	#16
silvereagle07 Registered User Join Date: Sep 2008 Location: Bailey, NC Posts: 2,462	Re: Transmission Crossmember Here's a tube kit from suicide doors. It sales for $69. Attached Images __________________ Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT Last edited by silvereagle07; 03-15-2011 at 12:55 PM.

03-15-2011, 01:31 PM	#17
killerpickup Registered User Join Date: Aug 2008 Location: Seabeck WA. Posts: 20	Re: Transmission Crossmember I noticed you still have the long tube headers. I found that changing to a mid length header I was able to route the pipes above the crossmember with no problem. killerpickup

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