Determining 2wd or 4wd (69-72)? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72BlckButy · 11-10-2009, 10:42 PM

What features will assist in determing if a Blazer/Jimmy is in fact a 2wd vs. 4wd?

Frame differences
VIN#
Tub differences

What do you need to look for?

HuggerCST · 11-10-2009, 11:52 PM

Quote:

Originally Posted by 72BlckButy

What features will assist in determing if a Blazer/Jimmy is in fact a 2wd vs. 4wd?

Frame differences
VIN#
Tub differences

What do you need to look for?

A front axle and driveshaft.

Sorry Nate, I couldn't resist! Ya gotta admit, you left yourself wide open for that though!

72BlckButy · 11-11-2009, 12:00 AM

Ok there Wynne, that's the last time I ask for assistance from you. Why don't you just go build another beautiful truck...

**lks dcvn** · 11-11-2009, 05:54 AM

2wd model key components...

frame differences - frame will be 104" wheelbase with rear coil springs with trailing arms - not leaf spring on the 4wd

VIN - will begin with a C if it is a factory 2wd. If the first digit of the VIN of the truck is a K - it was originally a 4wd.

front axle - 2wd - upper and lower arms and springs - not leaf spring straight axles like you find on a 4x4..

Tub differences - none. Except most of the 2wd Blazers I have found were rusted beyond belief...

OARNGESI · 11-11-2009, 07:01 AM

Aint 2wd blazers low hump and 4wd high humps

**lolife99** · 11-11-2009, 07:32 AM

Nate,... look at the rear frame rails. They should have the same shock crossmember as your truck. Coil spring area of the frame should look the same also.

mcampbell · 11-12-2009, 04:16 PM

I think the stock 2wd engine sits about 4" forward of the 4wd. This puts the transfer case shifter in a reasonable location. I think the frames have holes for both motor mount locations but a bad conversion will still have the engine in the stock location.

r1lorenzini · 11-12-2009, 05:06 PM

i believe there is a dimple in the frame on the drivers side.

72BlckButy · 11-17-2009, 09:57 AM

Thanks for the information guy's! I haven't been able to make it back out to look at the reason I made this thread.

As soon as I can get back out there and get some pics I will.

11-10-2009, 10:42 PM	#1
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Determining 2wd or 4wd (69-72)? What features will assist in determing if a Blazer/Jimmy is in fact a 2wd vs. 4wd? Frame differences VIN# Tub differences What do you need to look for? __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 11-10-2009 at 10:55 PM.

11-11-2009, 12:00 AM	#3
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Determining 2wd or 4wd (69-72)? Ok there Wynne, that's the last time I ask for assistance from you. Why don't you just go build another beautiful truck... __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 11-11-2009 at 12:02 AM.

11-11-2009, 05:54 AM	#4
lks dcvn Registered User Join Date: Jan 2007 Location: Columbus, Ohio Posts: 4,344	Re: Determining 2wd or 4wd (69-72)? 2wd model key components... frame differences - frame will be 104" wheelbase with rear coil springs with trailing arms - not leaf spring on the 4wd VIN - will begin with a C if it is a factory 2wd. If the first digit of the VIN of the truck is a K - it was originally a 4wd. front axle - 2wd - upper and lower arms and springs - not leaf spring straight axles like you find on a 4x4.. Tub differences - none. Except most of the 2wd Blazers I have found were rusted beyond belief...

11-11-2009, 07:01 AM	#5
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: Determining 2wd or 4wd (69-72)? Aint 2wd blazers low hump and 4wd high humps __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

11-11-2009, 07:32 AM	#6
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,703	Re: Determining 2wd or 4wd (69-72)? Nate,... look at the rear frame rails. They should have the same shock crossmember as your truck. Coil spring area of the frame should look the same also. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

11-12-2009, 04:16 PM	#7
mcampbell Registered User Join Date: Aug 2009 Location: Santa Clara, Utah Posts: 48	Re: Determining 2wd or 4wd (69-72)? I think the stock 2wd engine sits about 4" forward of the 4wd. This puts the transfer case shifter in a reasonable location. I think the frames have holes for both motor mount locations but a bad conversion will still have the engine in the stock location.

11-12-2009, 05:06 PM	#8
r1lorenzini Registered User Join Date: Sep 2004 Location: california Posts: 418	Re: Determining 2wd or 4wd (69-72)? i believe there is a dimple in the frame on the drivers side.

11-17-2009, 09:57 AM	#9
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Determining 2wd or 4wd (69-72)? Thanks for the information guy's! I haven't been able to make it back out to look at the reason I made this thread. As soon as I can get back out there and get some pics I will. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)



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