GMC 4000...? or 5000 series....Pictures...it's about time... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**62 Longbed** · 03-11-2012, 04:48 PM

Glad to see you got the truck ... I've known of that one for awhile ... Wanted to get it but I have no room for something that big ... Congrats !!!!

**Captainfab** · 03-11-2012, 06:03 PM

Very nice truck Les

I see that 'Dry Road/Slippery Road' switch under the radio. Normally that is for the power divider with dual drives. I'm curious what that functions as on your truck.

factorystock · 03-13-2012, 07:41 PM

Quote:

Originally Posted by Captainfab

Very nice truck Les

I see that 'Dry Road/Slippery Road' switch under the radio. Normally that is for the power divider with dual drives. I'm curious what that functions as on your truck.

The switch is a front brake limiting valve. It reduces air pressure applied to front brakes when on the "slippery postion". I bet this truck was a short wheel base 2 axle tractor in its earlier life. It was very common for large trucks to be modified when sold to fit the need of the new owner. A power divider differential lock will say "lock" "unlock".

A.T. RockDriller · 03-13-2012, 08:27 PM

Quote:

Originally Posted by factorystock

The switch is a front brake limiting valve. It reduces air pressure applied to front brakes when on the "slippery postion". I bet this truck was a short wheel base 2 axle tractor in its earlier life. It was very common for large trucks to be modified when sold to fit the need of the new owner. A power divider differential lock will say "lock" "unlock".

Yer all over it, factorystock....

**Captainfab** · 03-14-2012, 12:31 AM

Thank you for the info

Quote:

Originally Posted by factorystock

The switch is a front brake limiting valve. It reduces air pressure applied to front brakes when on the "slippery postion". I bet this truck was a short wheel base 2 axle tractor in its earlier life. It was very common for large trucks to be modified when sold to fit the need of the new owner. A power divider differential lock will say "lock" "unlock".

03-11-2012, 04:48 PM	#1
62 Longbed Senior Member Join Date: Nov 2008 Location: Gresham , Oregon Posts: 588	Re: GMC 4000...? or 5000 series....Pictures...it's about time... Glad to see you got the truck ... I've known of that one for awhile ... Wanted to get it but I have no room for something that big ... Congrats !!!!

03-11-2012, 06:03 PM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,254	Re: GMC 4000...? or 5000 series....Pictures...it's about time... Very nice truck Les I see that 'Dry Road/Slippery Road' switch under the radio. Normally that is for the power divider with dual drives. I'm curious what that functions as on your truck. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

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