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

1BadSS · 01-17-2007, 10:21 PM

Can I leave my stock manual trans crossmember in, and put in a auto trans crossmember for the th400 to bolt to? Would that work, I wanted to put some kind of scatter shield support off of the manual xmember, but I dont have a trans to look at and measure. Does anyone know?

lilpup69chevy · 01-17-2007, 10:28 PM

is it a 3 spd on the tree or a 4 spd toploader style trans? the reason i ask is the 3 spd style trans has the crossmember closer to the front and to switch to an auto you'll have to grind torch or cut the rivets out of that x member to get it out of the way for the auto to fit

1BadSS · 01-17-2007, 10:41 PM

Quote:

Originally Posted by lilpup69chevy

is it a 3 spd on the tree or a 4 spd toploader style trans? the reason i ask is the 3 spd style trans has the crossmember closer to the front and to switch to an auto you'll have to grind torch or cut the rivets out of that x member to get it out of the way for the auto to fit

Ah, well that ditches my idea of doing that then. How hard is it to get the manual xmember out without air tools, or a torch?

lilpup69chevy · 01-17-2007, 10:54 PM

well a grinder would work just grind it down to where you can take a hammer and a punch and get them out, someone torched mine out but they were stupid and just took the torch and cut the member leaving the rest still riveted to the frame, so when i get around to it i'm gonna take a torch and blow the rivet heads off, either way a grinder and a punch should get the job done just watch your fingers!!!!!

GMCMAX · 01-17-2007, 11:13 PM

If you don't have a grinder, you can center punch the head, drill a 1/8" or slightly larger hole all the way through, then drill with a 3/8"-7/16": the head will come off and you can punch the rest out. Worked for me on mine.

ghetto_superman · 01-18-2007, 02:53 AM

lilpup its crazy how many people actually leave chunks of crossmember in the frame.. i dont think i could slep at night if i knew i left all that garbage in there...

01-17-2007, 10:21 PM	#1
1BadSS NOT REALLY BANNED! Join Date: Jul 2004 Location: Shawnee, KS Posts: 1,072	Crossmember question.. Can I leave my stock manual trans crossmember in, and put in a auto trans crossmember for the th400 to bolt to? Would that work, I wanted to put some kind of scatter shield support off of the manual xmember, but I dont have a trans to look at and measure. Does anyone know? __________________ 1987 Mustang Coupe - 2.7 Stroker, 78mm turbo, Stainless header, 3" Exh, FMIC, 160lb/hr Injectors, MS3, twin walbro 255's, 34psi. Eating V8's daily. 04 Pontiac GTO 04 Ford Mustang GT 68 C20 LWB stripper truck 73 K5 Cheyenne 76 C20 Sierra Crew SRW 88 K20 Suburban I'm not hammering on metal just to hammer, i'm creating a piece of art.

01-17-2007, 10:28 PM	#2
lilpup69chevy 67-72 parts finder Join Date: Aug 2006 Location: southeast mo Posts: 788	Re: Crossmember question.. is it a 3 spd on the tree or a 4 spd toploader style trans? the reason i ask is the 3 spd style trans has the crossmember closer to the front and to switch to an auto you'll have to grind torch or cut the rivets out of that x member to get it out of the way for the auto to fit __________________ 1969 chevy shortstep 2wd (under construction) 1981 chevy scottsdale lwb 2wd (parts chaser) 2004 pontiac gto (daily driver) 2004 pontiac grand prix gt (the ol ladys car) 1985 chevy short wide 1970 chevy c10 lwb (another parts rig) 1969 gmc lwb (rainy day project) 1968 chevy lwb c10 250 I6 3 spd (soon to be swb)

01-17-2007, 10:54 PM	#4
lilpup69chevy 67-72 parts finder Join Date: Aug 2006 Location: southeast mo Posts: 788	Re: Crossmember question.. well a grinder would work just grind it down to where you can take a hammer and a punch and get them out, someone torched mine out but they were stupid and just took the torch and cut the member leaving the rest still riveted to the frame, so when i get around to it i'm gonna take a torch and blow the rivet heads off, either way a grinder and a punch should get the job done just watch your fingers!!!!! __________________ 1969 chevy shortstep 2wd (under construction) 1981 chevy scottsdale lwb 2wd (parts chaser) 2004 pontiac gto (daily driver) 2004 pontiac grand prix gt (the ol ladys car) 1985 chevy short wide 1970 chevy c10 lwb (another parts rig) 1969 gmc lwb (rainy day project) 1968 chevy lwb c10 250 I6 3 spd (soon to be swb)

01-17-2007, 11:13 PM	#5
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Re: Crossmember question.. If you don't have a grinder, you can center punch the head, drill a 1/8" or slightly larger hole all the way through, then drill with a 3/8"-7/16": the head will come off and you can punch the rest out. Worked for me on mine. __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

01-18-2007, 02:53 AM	#6
ghetto_superman Registered User Join Date: Sep 2006 Location: Omaha, NE Posts: 1,982	Re: Crossmember question.. lilpup its crazy how many people actually leave chunks of crossmember in the frame.. i dont think i could slep at night if i knew i left all that garbage in there... __________________ -1947 3100 -1968 C10 -1970 K20



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