76 chevy full size driveline question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76chevybowtie · 06-18-2011, 03:54 PM

hey guys
i just joined and i was wondering if you could help me out.
i have a 1976 chevy 3/4 ton pickup and im gonna lift it. i was just wonderin if i go with a 6 inch kit from skyjacker will i have to get different drivelines?
thanks.

Toxic Redline · 06-18-2011, 06:15 PM

well i have a 4 inch lift and my rear driveline is like right on end im getting a new one soon so i say you would have to get new drive lines, 4 inch is about the biggest you can "get by" with but even then its iffy that you might ruin splines on the output shaft,

76chevybowtie · 06-18-2011, 10:02 PM

What tranny and t case you got?

BigRed76 · 06-18-2011, 10:32 PM

I did a 4" lift on my 1/2 ton and that stretched the driveshafts to the max, I was told previously that a 6" lift would force me to get new driveshafts and I believe it now.

76chevybowtie · 06-18-2011, 10:58 PM

my truck has a th350 with a 203 t case i believe that makes a difference........ doesnt it?

LONGHAIR · 06-19-2011, 08:43 AM

Maybe, but not in a good way. The NP203 is longer than the others, so it makes the driveshaft shorter from the start. A shorter shaft makes for more of an angular change. This makes it more likely that your existing shaft will be too short.
The front is probably going to need work either way.

Toxic Redline · 06-19-2011, 10:28 PM

No with a four inch the driveline will work, that is if you feel comfortable with a 1/2 in to an inch left on your outputshaft,(usually you have like 3 inches in there) go for it,

but dont start crying when you drop a line on the freeway/offroad and ruin your line and or exhaust/tank/bed/wires, and possibly ruin your tail shaft gears ,,its made to be a certain length, , i'm playing this driveline game right now, ,

all im saying is that
with my 208 tranfercase it worked (still had like almost two inches) but now with this new tranny and 205 it wont, with the 208 you could probably use a burban driveline for a longbed truck, but with my 205 it is on end,

if you do your lift put the driveline in (if it fits) and then push up and down on the line by the transfercase, if it moves excessively and you can hear a (click, click, click) then its too short, get a longer on, , , it will work ..... sorta.... but who knows how long

06-18-2011, 03:54 PM	#1
76chevybowtie Registered User Join Date: Jun 2011 Location: Bend, Oregon Posts: 4	76 chevy full size driveline question hey guys i just joined and i was wondering if you could help me out. i have a 1976 chevy 3/4 ton pickup and im gonna lift it. i was just wonderin if i go with a 6 inch kit from skyjacker will i have to get different drivelines? thanks.

06-18-2011, 06:15 PM	#2
Toxic Redline Registered User Join Date: May 2010 Location: Ogden, Utah Posts: 219	Re: 76 chevy full size driveline question well i have a 4 inch lift and my rear driveline is like right on end im getting a new one soon so i say you would have to get new drive lines, 4 inch is about the biggest you can "get by" with but even then its iffy that you might ruin splines on the output shaft, __________________ 84 K20 Long Box W.I.P 78 Burb - parts now [Rolled] 68 c20 dump bed WHEN IN DOUBT--- FLOOR IT

06-18-2011, 10:02 PM	#3
76chevybowtie Registered User Join Date: Jun 2011 Location: Bend, Oregon Posts: 4	Re: 76 chevy full size driveline question What tranny and t case you got?

06-18-2011, 10:32 PM	#4
BigRed76 Registered User Join Date: Jan 2010 Location: Loveland, CO Posts: 1,921	Re: 76 chevy full size driveline question I did a 4" lift on my 1/2 ton and that stretched the driveshafts to the max, I was told previously that a 6" lift would force me to get new driveshafts and I believe it now. __________________ Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB

06-18-2011, 10:58 PM	#5
76chevybowtie Registered User Join Date: Jun 2011 Location: Bend, Oregon Posts: 4	Re: 76 chevy full size driveline question my truck has a th350 with a 203 t case i believe that makes a difference........ doesnt it?

06-19-2011, 10:28 PM	#7
Toxic Redline Registered User Join Date: May 2010 Location: Ogden, Utah Posts: 219	Re: 76 chevy full size driveline question No with a four inch the driveline will work, that is if you feel comfortable with a 1/2 in to an inch left on your outputshaft,(usually you have like 3 inches in there) go for it, but dont start crying when you drop a line on the freeway/offroad and ruin your line and or exhaust/tank/bed/wires, and possibly ruin your tail shaft gears ,,its made to be a certain length, , i'm playing this driveline game right now, , all im saying is that with my 208 tranfercase it worked (still had like almost two inches) but now with this new tranny and 205 it wont, with the 208 you could probably use a burban driveline for a longbed truck, but with my 205 it is on end, if you do your lift put the driveline in (if it fits) and then push up and down on the line by the transfercase, if it moves excessively and you can hear a (click, click, click) then its too short, get a longer on, , , it will work ..... sorta.... but who knows how long __________________ 84 K20 Long Box W.I.P 78 Burb - parts now [Rolled] 68 c20 dump bed WHEN IN DOUBT--- FLOOR IT Last edited by Toxic Redline; 06-19-2011 at 10:29 PM.



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