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#1 |
Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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which trucks have the double hump crossmember?
simple question
![]() any idea on which trucks have the double hump tranny cross member? i'm thinking or redoing my exhaust with one to make it flow a little better ![]() |
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#2 |
Senior Member
Join Date: Dec 1999
Location: Knightstown, in, usa
Posts: 2,525
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Re: which trucks have the double hump crossmember?
I had a 72 with TH350, that used the double hoop trans crossmember.
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1970 long fleet, 355 4 speed, primer, walnut goodies |
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#3 |
Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Re: which trucks have the double hump crossmember?
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#4 |
glamoros piece o' lowlife
Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
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Re: which trucks have the double hump crossmember?
You don't need no double hump, what you need are these:
![]() and a pair of these: ![]() and you're good. Oh, and some heat insulating stuff for the speedo cable, or yer ruck will smell like burnt rubber for quite some time (guess how I know). Pics of the setup tomorrow, too tired now after installing it for over four hours...
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The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express |
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#5 |
Registered User
Join Date: Jun 2007
Location: NW Pennsylvania
Posts: 92
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Re: which trucks have the double hump crossmember?
Where did you get "these & those?" I have the non-double-hump cross member and I just don't feel like scrounging around for another crossmember at this point in time, but I am considering dual exhaust with headers.
I wouldn't mind seeing the photos of the install so I can see how you used the offsets. ~ Dave [QUOTE=Ivan D.;2163907]You don't need no double hump, what you need are these: ![]() and a pair of these: ![]() Last edited by Yankeelights; 06-12-2007 at 01:49 PM. |
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#6 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: which trucks have the double hump crossmember?
3/4 tons and 1 tons have the dual hump crossmember. Look for trucks with a BB or 350 SB with a 400th tranny.
I have a custom made cross member. However, i'm not sure how well it will hold up to the new engine. |
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#7 |
yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,824
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Re: which trucks have the double hump crossmember?
Your crossmember will be fine no matter what engine you have installed.
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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 |
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#8 |
paper or plastic?
Join Date: Nov 2002
Location: SW Missouri
Posts: 671
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Re: which trucks have the double hump crossmember?
I got one out of a 78' suburban 454/th400
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1967 Chevy SWB 250 http://67-72chevytrucks.com/vboard/s...d.php?t=442157 1977 Chevy SWB 454 No More 454 getting 5.3 http://67-72chevytrucks.com/vboard/s...d.php?t=310518 1977 Stepside Truck of the month winner http://67-72chevytrucks.com/vboard/s...d.php?t=135524 1965 Chevy C10 454 http://67-72chevytrucks.com/vboard/s...d.php?t=731372 1975 Dodge Power Wagon http://67-72chevytrucks.com/vboard/s...=1#post7871388 |
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#9 | |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: which trucks have the double hump crossmember?
Quote:
When I was looking for one a couple of months ago, it looked like 3/4 and 1 tons had a taller frame. If you used all of the parts of a double hump crossmember, I don't think the brackets that mont to the upper part of the frame would reach. I don't know this for sure. It was just my observation. I got my double hump crossmember off a late 70s BIG 10 or Heavy Half. I don't remember which one it was. Slonaker |
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#10 |
yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,824
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Re: which trucks have the double hump crossmember?
Eric, the early to mid 70's trucks had them, regardless of engine/suspension setups. I want to say 73-76. My '73 1/2 ton 350 equipped truck has one.
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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 |
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#11 | |
Oh,you can't buy that new
![]() Join Date: Apr 2000
Location: Pennsville,N.J. 08070, USA
Posts: 2,042
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Re: which trucks have the double hump crossmember?
Quote:
Slonaker mentioned the taller frames. I never really saw a need for the upper piece (brace)and that is the only thing different on 3/4 or 1 tons because they are longer for the taller frame. A Good source is dead diesel trucks and there are plenty of those around. ![]() If the bolts are original they shoould be 7/16 diameter with a 5/8 head but i've unbolted a lot that had only the 3/8 bots with 9/16 head.
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"been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone ![]() 73 Pinto, stock, w/CragarSS's-eww ![]() 84,C10 SWB-Yella,stock 86 K10 SWB-Red, hopped up 305,4/S LOTS of Cummins trucks. |
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#12 |
Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Re: which trucks have the double hump crossmember?
ya'll know what size bolts hold it on??? incase i want to go to the junk yard?
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#13 |
Registered User
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
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Re: which trucks have the double hump crossmember?
I probably should have done that with mine but I didn't feel like hunting down a cross member.
The ultimate would be to fab up a tubular cross member if you or someone you knew could weld. |
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#14 | |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,021
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Re: which trucks have the double hump crossmember?
Quote:
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#15 |
Registered User
Join Date: Mar 2007
Location: Central FL
Posts: 92
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Re: which trucks have the double hump crossmember?
I see that you have the cross member bolted into the top of the frame as well as the bottom, is there an OE cross member that bolts in the same way? I ask because I have a set of bolts hanging in that same spot with nothing attached to them. My cross member sits inside the frame and is only bolted to the bottom of the frame.
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#16 | |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: which trucks have the double hump crossmember?
Quote:
EDIT: This is Capt Kaos's doublehump crossmember (top of photo) with the extra legs in place: http://www.captkaoscustoms.com/images/framecross3.jpg Slonaker Last edited by Slonaker; 05-09-2007 at 09:56 AM. Reason: added link to website |
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#17 |
Registered User
Join Date: Apr 2007
Location: Arkansas
Posts: 15
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Re: which trucks have the double hump crossmember?
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#18 |
yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,824
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Re: which trucks have the double hump crossmember?
Both,
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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 |
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#19 |
Chris
Join Date: Nov 2004
Location: Monaville, WV
Posts: 3,737
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Re: which trucks have the double hump crossmember?
Can someone post a pic of the said double hump crossmember?
if it's what I'm thinking of the 86 4x4 1/2 ton we had, had the double one on it, with a 700r4 and 208 t-case.
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Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454 |
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#20 |
Registered User
Join Date: May 2004
Location: Lubbock, Texas
Posts: 2,121
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Re: which trucks have the double hump crossmember?
My '74 C20 has one.
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'96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer |
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#21 |
Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Re: which trucks have the double hump crossmember?
alright, i need some plans on that so i can get it built myself.
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#22 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: which trucks have the double hump crossmember?
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#23 |
Registered User
Join Date: Feb 2006
Location: Cleveland, TN
Posts: 440
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Re: which trucks have the double hump crossmember?
my exhaust runs above my trans crossmember, I have had dual 3" and no have dual 2.5"
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1981 Custom Deeluxe SWB 5.3/4L60e 3.73 and Auburn. Mustang Dyno 265hp/258tq |
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#24 |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: which trucks have the double hump crossmember?
http://www.speedwaymotors.com/p/4219...temNo=91628903
Something like that should work if you want to make your own, assuming it is wide enough. Slonaker |
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#25 |
Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: which trucks have the double hump crossmember?
The braces are a little over kill but to each his own. I can post a picture of mine tommorow.
Ivan D. Have any part numbers for those exhaust parts?
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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