How to check frame for square. Help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PTS Kustoms · 08-28-2004, 01:46 AM

I Am Building A Frame Off 71 Swb Chevy. I Would Like To Double Check If The Frame Is Actually Square. Do You Do A Cross Measurement From End To End Or A Middle Cross Measurement From Lets Say Front Bed Mount To Front Cab Mount? I Did A Cross End To End And Then A Cross Measurement Mount To Mount And Both Read A Different +or-. Please Help I Am At The Point Of Modifying The Factory Rear Panhard Mount Crossmember To Accept The Hot Rods To Hell Truck Arm Kit(very Crucial If Frame Is Off).

Thanks,

Perry

*Shane* · 08-28-2004, 03:28 AM

measure in an "X" pattern ... front right to rear left & front left to rear right ... the measurements should be the same

68LSS1 · 08-28-2004, 05:32 AM

Quote:

Originally Posted by Shane

measure in an "X" pattern ... front right to rear left & front left to rear right ... the measurements should be the same

That's about all you're going to be able to do. You could spend time leveling the frame rails side to side and measuring to the floor but most floors aren't straight enough to go by. Good luck on the HTH kit. I finally got mine welded up the week before last.

MOTHERTRUCKERS · 08-28-2004, 07:59 AM

Believe it or not but we take the frames to our Ford dealership to have them checked, GM sent them the specs for their Gen 3 frame machine and they give us a computer print out on each frame for our customers and our peace of mind.

PTS Kustoms · 08-28-2004, 11:53 AM

Thanks For The Advice! I Beleive I Will Take The Frame To A Shop That Has The Specs And Double Check. I Am A Picky Pain In The @%#. Lss1 How Do You Like The Hrh Kit? Any Problems Or Suggestions? Do You Have Any Pics?

Thanks...

walker · 08-28-2004, 02:12 PM

THe repair manual I bought from one of the vendors has a section on frame truing in it. It has all the measurements in it as well.

SCOTI · 08-28-2004, 03:53 PM

I did the diagonal measure from corner to corner on the extra frame I picked up to make sure it wasn't too far off. The numbers may not be exact, but they should be within 3/16 to 1/4" of each other.

I wonder if all Ford dealerships have that frame info?

PTS Kustoms · 08-28-2004, 05:12 PM

I Measured My Frame Left Front To Left Rear, Then Left Rear To Right Rear, Then Right Rear To Left Front Diagonally Then Wrote Down Each Measurement And Then Did Just The Opposite On The Other Side And I Was 1/16" Off. I Went To A Drag Racing Chassis Manual To Come Up With This Procedure. Basically You Shoud Be Able To Measure The Right Side And Flip It Over To The Left Side. Are You Confused? I Was Until I Did It...

SCOTI · 08-28-2004, 07:39 PM

I did that & confirmed w/the diagonal measurement as well.

08-28-2004, 01:46 AM	#1
PTS Kustoms Registered User Join Date: Feb 2004 Location: Roswell, N.M. Posts: 210	How to check frame for square. Help! I Am Building A Frame Off 71 Swb Chevy. I Would Like To Double Check If The Frame Is Actually Square. Do You Do A Cross Measurement From End To End Or A Middle Cross Measurement From Lets Say Front Bed Mount To Front Cab Mount? I Did A Cross End To End And Then A Cross Measurement Mount To Mount And Both Read A Different +or-. Please Help I Am At The Point Of Modifying The Factory Rear Panhard Mount Crossmember To Accept The Hot Rods To Hell Truck Arm Kit(very Crucial If Frame Is Off). Thanks, Perry

08-28-2004, 07:59 AM	#4
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	Believe it or not but we take the frames to our Ford dealership to have them checked, GM sent them the specs for their Gen 3 frame machine and they give us a computer print out on each frame for our customers and our peace of mind. __________________ Rest in Peace Ed. Thanks for all the good times.

08-28-2004, 02:12 PM	#6
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	THe repair manual I bought from one of the vendors has a section on frame truing in it. It has all the measurements in it as well. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

08-28-2004, 03:53 PM	#7
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,098	I did the diagonal measure from corner to corner on the extra frame I picked up to make sure it wasn't too far off. The numbers may not be exact, but they should be within 3/16 to 1/4" of each other. I wonder if all Ford dealerships have that frame info? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

08-28-2004, 07:39 PM	#9
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,098	I did that & confirmed w/the diagonal measurement as well. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

08-28-2004, 03:28 AM	#2
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	measure in an "X" pattern ... front right to rear left & front left to rear right ... the measurements should be the same

08-28-2004, 11:53 AM	#5
PTS Kustoms Registered User Join Date: Feb 2004 Location: Roswell, N.M. Posts: 210	Thanks For The Advice! I Beleive I Will Take The Frame To A Shop That Has The Specs And Double Check. I Am A Picky Pain In The @%#. Lss1 How Do You Like The Hrh Kit? Any Problems Or Suggestions? Do You Have Any Pics? Thanks...

08-28-2004, 05:12 PM	#8
PTS Kustoms Registered User Join Date: Feb 2004 Location: Roswell, N.M. Posts: 210	I Measured My Frame Left Front To Left Rear, Then Left Rear To Right Rear, Then Right Rear To Left Front Diagonally Then Wrote Down Each Measurement And Then Did Just The Opposite On The Other Side And I Was 1/16" Off. I Went To A Drag Racing Chassis Manual To Come Up With This Procedure. Basically You Shoud Be Able To Measure The Right Side And Flip It Over To The Left Side. Are You Confused? I Was Until I Did It...



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