NP203 whats the deal with axel swap? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dmartin1 · 07-11-2011, 03:48 AM

so i have a 1978 k20 with an NP203 transfercase..it was factory fulltime 4x4 or whatever that deal is.

so i swapped out front and rearend out of a 1979 k20 suburban with a different transfercase.

the front has wolverine manual locking hubs.

in unlocked,2wd mode the truck doesnt go anywhere much and makes a grinding sound.
when there locked in,the truck drives perfect like it regularly did before(all with the transfercase in 2wd)

What makes it do this?like,with the transfercase in 2wd and the front hubs unlocked,shouldnt it still move? i dont get it.

07-11-2011, 03:48 AM	#1
dmartin1 Registered User Join Date: Aug 2008 Location: mohave valley,arizona Posts: 1,088	NP203 whats the deal with axel swap? so i have a 1978 k20 with an NP203 transfercase..it was factory fulltime 4x4 or whatever that deal is. so i swapped out front and rearend out of a 1979 k20 suburban with a different transfercase. the front has wolverine manual locking hubs. in unlocked,2wd mode the truck doesnt go anywhere much and makes a grinding sound. when there locked in,the truck drives perfect like it regularly did before(all with the transfercase in 2wd) What makes it do this?like,with the transfercase in 2wd and the front hubs unlocked,shouldnt it still move? i dont get it. __________________ 1969 Shortbed in progress 1982 short step, few suspension and motor upgrades.getting a 468 1978 Shortbed fleet side bonanza fully loaded 1978 k20 Silverado loaded.currently engine-less 1989 k10 suburban 9" lift 65 nova And more



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