1972-4x4 light - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sprinter7x · 02-04-2015, 12:10 AM

Recently bought a GMC K1500.I would like to have some kind of light showing when in 4x4,has anyone rigged one up?

franken · 02-04-2015, 08:44 PM

Late model NP205s had a switch in the outer detent spring/ball setup rather than just a plug, spring and ball. You may be able to still find one for an 86+ 1-ton, maybe others.

Google says GM P/N 15594176
https://www.google.com/?gws_rd=ssl#q...+detent+switch

Sprinter7x · 02-04-2015, 09:33 PM

Thank's franken.

**special-K** · 02-05-2015, 10:03 AM

I have a light in my head

Mike C · 02-05-2015, 06:30 PM

205's are usually loud enough when in 4x4 that you have no problem knowing... And on mine, the bumpsteer will clue you in pretty quick!

slotard · 02-05-2015, 08:31 PM

Why do you get more bump steer in 4WD?

mrolds88 · 02-05-2015, 11:43 PM

Just go around the corner in 4x, you'll understand.

Bigdav160 · 02-06-2015, 08:08 AM

Quote:

Originally Posted by slotard

Why do you get more bump steer in 4WD?

Because, in these 4x4's, the drag link moves in an arc as the suspension goes up and down. Since it's connected to the steering box it moves the steering wheel back and forth

71K20chevy · 02-06-2015, 12:12 PM

Quote:

Originally Posted by Mike C

205's are usually loud enough when in 4x4 that you have no problem knowing... And on mine, the bumpsteer will clue you in pretty quick!

Mine makes no noise at all when in 4x4. You usually find out when trying to turn a corner

BLT gmc · 02-06-2015, 01:53 PM

Search for this in 67-72 Tech Tips "67-72 New use for the empty slot in a tach cluster"
An interesting lighting option to your idea. Bruce

Bigdav160 · 02-06-2015, 03:19 PM

Too bad the only switch I can find is $100. Maybe I should look at a Dodge application. Did they have a light?

slotard · 02-06-2015, 04:22 PM

Quote:

Originally Posted by Bigdav160

Because, in these 4x4's, the drag link moves in an arc as the suspension goes up and down. Since it's connected to the steering box it moves the steering wheel back and forth

Mike C claims that you can tell by the bump steer whether or not it's in 4WD. I understand why there's bump steer, just not why being in 4WD would change it.

Bigdav160 · 02-06-2015, 05:54 PM

Sorry I mis understood

**special-K** · 02-07-2015, 09:36 AM

Quote:

Originally Posted by slotard

Why do you get more bump steer in 4WD?

I guess he's saying you can't help but notice when 4wd is engaged by the many ways you feel the difference of the front wheels being engaged. I guess the most likely time you'll be in 4wd when you didn't intend to is when it was left in the last time you drove. It doesn't take long to notice, if roads are clear. I routinely put it back in 2HI before I get out. I often need 4wd just to back up my driveway. Even in my '92 with a graphic display on the console I would pull out and wonder why the truck felt funny, then look down at graphic and DOH! Never got far w/o realizing.

franken · 02-07-2015, 08:43 PM

Heh, I didn't check the switch price. $100 would hurt.
A cheaper route might be a weatherproof limit switch on the shift linkage.

Orange Crate · 02-09-2015, 05:34 PM

Quote:

Originally Posted by BLT gmc

Search for this in 67-72 Tech Tips "67-72 New use for the empty slot in a tach cluster"
An interesting lighting option to your idea. Bruce

Search is completely busted because nobody tipped their server....

(Migrating to a new server)

Vintage Windmills · 02-09-2015, 09:54 PM

Quote:

Originally Posted by Orange Crate

Search is completely busted because nobody tipped their server....

(Migrating to a new server)

While you cant search a specific subforum, the google box at the top pointed me right to it: http://67-72chevytrucks.com/vboard/s...d.php?t=449590

I like it.

joeydurango · 02-10-2015, 11:01 AM

Yeah, it's pretty difficult to drive for any length of time in 4WD without knowing it. Everything feels different.

02-04-2015, 12:10 AM	#1
Sprinter7x Registered User Join Date: Jan 2015 Location: Higginsville Mo. Posts: 2	1972-4x4 light Recently bought a GMC K1500.I would like to have some kind of light showing when in 4x4,has anyone rigged one up?

02-04-2015, 08:44 PM	#2
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,122	Re: 1972-4x4 light Late model NP205s had a switch in the outer detent spring/ball setup rather than just a plug, spring and ball. You may be able to still find one for an 86+ 1-ton, maybe others. Google says GM P/N 15594176 https://www.google.com/?gws_rd=ssl#q...+detent+switch

02-04-2015, 09:33 PM	#3
Sprinter7x Registered User Join Date: Jan 2015 Location: Higginsville Mo. Posts: 2	Re: 1972-4x4 light Thank's franken.

02-05-2015, 10:03 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 1972-4x4 light I have a light in my head __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-05-2015, 06:30 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: 1972-4x4 light 205's are usually loud enough when in 4x4 that you have no problem knowing... And on mine, the bumpsteer will clue you in pretty quick! __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

02-05-2015, 08:31 PM	#6
slotard Registered User Join Date: Nov 2014 Location: Alameda, CA Posts: 877	Re: 1972-4x4 light Why do you get more bump steer in 4WD? __________________ 1973 C20, 350/350

02-05-2015, 11:43 PM	#7
mrolds88 Registered User Join Date: Jul 2011 Location: WV Posts: 946	Re: 1972-4x4 light Just go around the corner in 4x, you'll understand. __________________ 72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD

02-06-2015, 01:53 PM	#10
BLT gmc Registered User Join Date: Feb 2014 Location: West Iowa Posts: 1,106	Re: 1972-4x4 light Search for this in 67-72 Tech Tips "67-72 New use for the empty slot in a tach cluster" An interesting lighting option to your idea. Bruce

02-06-2015, 03:19 PM	#11
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 1972-4x4 light Too bad the only switch I can find is $100. Maybe I should look at a Dodge application. Did they have a light? __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

02-06-2015, 05:54 PM	#13
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 1972-4x4 light Sorry I mis understood __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

02-07-2015, 08:43 PM	#15
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,122	Re: 1972-4x4 light Heh, I didn't check the switch price. $100 would hurt. A cheaper route might be a weatherproof limit switch on the shift linkage.

02-10-2015, 11:01 AM	#18
joeydurango Registered User Join Date: Dec 2013 Location: Durango, CO Posts: 827	Re: 1972-4x4 light Yeah, it's pretty difficult to drive for any length of time in 4WD without knowing it. Everything feels different. __________________ 1972 K10 Cheyenne Super \| LWB, fleetside \| 350/350/205 \| KEEPER 1971 K10 Cheyenne \| SWB, fleetside \| LS Swap 5.3/4L60 \| SOLD 1976 Trans Am \| 400/4-spd \| SOLD 1976 Trans Am \| 455/4-spd \| TOTALED



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