crossmember info - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Matt Man · 11-12-2009, 09:36 PM

ok if i switch my truck to 4wd will i need another crossmember? also would i have to pull the engine to change the crossmember, also is the crossmember welded to the frame?

**Dieselwrencher** · 11-12-2009, 10:21 PM

Yes if your truck is 2wd you will have to change it to a 4wd cross member. You don't have to pull the engine, but I can tell you it will be 100x easier to just pull it and get it out of the way. I'm sure you could do it with it jacked up with a cherry picker still hooked to the tranny, but it won't be fun. And the crossmember isn't welded in place, it has rivets that hold it in. You either torch them out, or use a chisel, air chisel, grinder, or cut off wheel to cut the head off. Then you use a punch and knock them out.

72 CustomCamper · 11-12-2009, 11:37 PM

The 2wd crossmember is bolted in...

Chuck

Matt Man · 11-13-2009, 12:42 AM

i will poke around my truck tommorow to see for sure. i just really dont want to pull the engine....

ghettoluxury · 11-13-2009, 07:07 AM

No need the motor mounts will keep it from dropping too far. Just suport the tranny with a floor jack

**Dieselwrencher** · 11-13-2009, 04:07 PM

The motor mount brackets are bolted to the cross member so that is a problem. You have to unbolt the motor mount brackets to get the crossmember out.

b454rat · 11-13-2009, 05:42 PM

No matter how you get it out, a 4wd crossmember won't bolt in. I tried 2 different ones and neither would go in without trimming. I'm gonna use the stock 2wd mounts and have a crossmember fabbed up after I get the motor ready to go in. I have a tall deck with the huge oil pan, so need to have the motor to get it to fit.

11-12-2009, 09:36 PM	#1
Matt Man Registered User Join Date: Oct 2009 Location: Buhl, Idaho Posts: 1,438	crossmember info ok if i switch my truck to 4wd will i need another crossmember? also would i have to pull the engine to change the crossmember, also is the crossmember welded to the frame? __________________ 86 c30 crew cab dually 454/400 4/6 drop SOLD 1-8-11 1981 chevy K10 short Bed Scottsdale SOLD 10-26-2020 67 GMC Stepside Straight six/3 on the tree "The Peach" 2020 Silverado Double Cab LT Z71 5.3 8 speed Daily Driver K10 build http://67-72chevytrucks.com/vboard/s...d.php?t=671934 The Peach build http://67-72chevytrucks.com/vboard/s...d.php?t=733903

11-12-2009, 10:21 PM	#2
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: crossmember info Yes if your truck is 2wd you will have to change it to a 4wd cross member. You don't have to pull the engine, but I can tell you it will be 100x easier to just pull it and get it out of the way. I'm sure you could do it with it jacked up with a cherry picker still hooked to the tranny, but it won't be fun. And the crossmember isn't welded in place, it has rivets that hold it in. You either torch them out, or use a chisel, air chisel, grinder, or cut off wheel to cut the head off. Then you use a punch and knock them out. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

11-12-2009, 11:37 PM	#3
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,368	Re: crossmember info The 2wd crossmember is bolted in... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

11-13-2009, 12:42 AM	#4
Matt Man Registered User Join Date: Oct 2009 Location: Buhl, Idaho Posts: 1,438	Re: crossmember info i will poke around my truck tommorow to see for sure. i just really dont want to pull the engine.... __________________ 86 c30 crew cab dually 454/400 4/6 drop SOLD 1-8-11 1981 chevy K10 short Bed Scottsdale SOLD 10-26-2020 67 GMC Stepside Straight six/3 on the tree "The Peach" 2020 Silverado Double Cab LT Z71 5.3 8 speed Daily Driver K10 build http://67-72chevytrucks.com/vboard/s...d.php?t=671934 The Peach build http://67-72chevytrucks.com/vboard/s...d.php?t=733903

11-13-2009, 07:07 AM	#5
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: crossmember info No need the motor mounts will keep it from dropping too far. Just suport the tranny with a floor jack __________________ 1949 Five Window, 1973 Step Side, 2000 Z71

11-13-2009, 04:07 PM	#6
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: crossmember info The motor mount brackets are bolted to the cross member so that is a problem. You have to unbolt the motor mount brackets to get the crossmember out. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.* Last edited by Dieselwrencher; 11-13-2009 at 04:07 PM.

11-13-2009, 05:42 PM	#7
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,469	Re: crossmember info No matter how you get it out, a 4wd crossmember won't bolt in. I tried 2 different ones and neither would go in without trimming. I'm gonna use the stock 2wd mounts and have a crossmember fabbed up after I get the motor ready to go in. I have a tall deck with the huge oil pan, so need to have the motor to get it to fit. __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS



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