Need front drive shaft info.. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**FRENCHBLUE72** · 12-30-2005, 03:06 PM

I have lifted my blazer 6'' and the front shaft will fit but it will not rotate cause the yoke bolts hit the shft ears did these front shafts come with a c-v joint on the top from the factory mine does not have a c-v style yoke just a regular yoke like the back shaft.. Btw blazer is a 72 with a 44 front..

Blazer1970 · 12-30-2005, 07:56 PM

Yes, it came with a double cardan ("CV") at the transfer case end from the factory.

**FRENCHBLUE72** · 12-30-2005, 08:45 PM

Looks like I have something else to add to the list.. Thanks 's for the reply..

1967k30 · 12-30-2005, 09:45 PM

My 67' didn't have a CV shaft buy my brothers 67' did.

.That is one thing most of us forget when we lift out rigs.I did some grinding on mine to get me by until I got a CV one.

LONGHAIR · 12-31-2005, 07:59 AM

Even switching to a CV jointed shaft will not guarantee the fit with-out grinding. There are usually travel limiting tabs on the castings. They are small square bumps on the end of the joint where the center casting meets the driveshaft. These can be ground down for clearence...but be careful, a little goes a long way and too much just weakens the joint. It is usually in the 6 to 8 inch range where this starts to become an issue.

**Yukon Jack** · 12-31-2005, 10:04 AM

My 69 K20 didn't have a cv and with just a 4" lift it was too short. Had it lengthened and then when I installed it, found it would not turn - back to the shop but luckily they cut me a deal on getting a cv installed. I was feeling like an idiot when I brought the driveshaft back to them.

toolman · 01-04-2006, 05:20 PM

Don't mean to steal the thread, but a question for Yukon Jack. I just did almost the same thing on my 68 (with 4" lift also),
splines were shot on the front driveshaft (which is not a CV style). So, I finally got around to getting it repaired and now with no play in the splines, the front shaft will not rotate by hand....bummer. Trying to get the daily driver fixed up a bit and keep running into little things that end up costing big bucks...guess that's the name of the game though..otherwise what would keep things interesting...ha
anyway...trying to decide now whether to install shims to rotate the axle a bit, or pay the bucks to have the CV added to my shaft ?
So, did adding the CV joint to your shaft take care of the rotation problem on your truck ?

stan79chevy · 01-04-2006, 07:06 PM

my truck is a 79 but the transfer case is a 70. what i did to fix basically the same problem was change teh front output to the newer style with the square flange. that was cheaper than a new driveshaft.

stan

toolman · 01-05-2006, 04:21 PM

Help me out ...
I guess I am unsure of what you are saying?
If I understand correctly...you changed the output yoke on the transfer case ?, didn't you then have to use a different drive shaft as well ?

stan79chevy · 01-05-2006, 04:52 PM

yes. i changed driveshafts i had one in the garage that was the correct length. i guess if you dont have the other syle one laying around it wouldnt be cheaper for you. sorry about that im not sure what i was thinking. thats why its good to have a brother in law who is a mechanic and keeps everything.

stan

**Yukon Jack** · 01-06-2006, 10:39 AM

Quote:

Originally Posted by toolman

Don't mean to steal the thread, but a question for Yukon Jack. I just did almost the same thing on my 68 (with 4" lift also),
splines were shot on the front driveshaft (which is not a CV style). So, I finally got around to getting it repaired and now with no play in the splines, the front shaft will not rotate by hand....bummer. Trying to get the daily driver fixed up a bit and keep running into little things that end up costing big bucks...guess that's the name of the game though..otherwise what would keep things interesting...ha
anyway...trying to decide now whether to install shims to rotate the axle a bit, or pay the bucks to have the CV added to my shaft ?
So, did adding the CV joint to your shaft take care of the rotation problem on your truck ?

Yep, adding the CV joint did take care of the rotation problem. The guy who did the work was real cool and sourced a good used CV joint. When I took a different shaft in, it turned out the CV joint was not rebuildable - too damaged they said - and they put together a new CV joint driveshaft - it was pretty dang expensive! Hopefully if you get a CV, it won't be too expensive.

toolman · 01-06-2006, 02:02 PM

Good deal.. thanks for the help..good to know that should take care of the problem at least.

Ya, a new CV shaft is big bucks unfortunatly...I may do some salvage yard looking to see what I can find...as I assume when you go with a CV shaft you need a different yoke on the transfer case as well ?
If I do need a new yoke, (I think I read that you have a Rockwell TC , same as mine)....where did you find a yoke to fit the TC splines and the CV shaft ?

and to Stan79 chevy....thanks for the reply...I wish we just had even some salvage yards with lots of parts lying around here. Much less a brother in law..your lucky. I am the one around here that doesn't throw anything away...unfortunatly just haven't been around 4-wheel drive stuff long enough to have much...any idea what the shaft and flange that you used was out of ?

12-30-2005, 03:06 PM	#1
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,591	Need front drive shaft info.. I have lifted my blazer 6'' and the front shaft will fit but it will not rotate cause the yoke bolts hit the shft ears did these front shafts come with a c-v joint on the top from the factory mine does not have a c-v style yoke just a regular yoke like the back shaft.. Btw blazer is a 72 with a 44 front.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

12-30-2005, 07:56 PM	#2
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Need front drive shaft info.. Yes, it came with a double cardan ("CV") at the transfer case end from the factory. __________________ Tim

12-30-2005, 08:45 PM	#3
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,591	Re: Need front drive shaft info.. Looks like I have something else to add to the list.. Thanks 's for the reply.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

12-30-2005, 09:45 PM	#4
1967k30 Senior Member Join Date: Sep 2005 Location: NE Posts: 363	Re: Need front drive shaft info.. My 67' didn't have a CV shaft buy my brothers 67' did. .That is one thing most of us forget when we lift out rigs.I did some grinding on mine to get me by until I got a CV one. __________________ 01 2500 Duramax,6spd,4x4,Not stock. Estimated 550rwhp/1100rwfp on fuel only. 03 3500 Duramax,6spd,4x4,Pac-Brake,not stock Estimated 500rwhp/1000rwfp fuel only 67 K10 in many pieces Little Brothers truck 67 K20 Cummins 12V/NV4500/205, D60/Eaton w/ Detroit,37" Xterrains,crossover steering, Future plans,Twins and lots of fuel.

12-31-2005, 07:59 AM	#5
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Re: Need front drive shaft info.. Even switching to a CV jointed shaft will not guarantee the fit with-out grinding. There are usually travel limiting tabs on the castings. They are small square bumps on the end of the joint where the center casting meets the driveshaft. These can be ground down for clearence...but be careful, a little goes a long way and too much just weakens the joint. It is usually in the 6 to 8 inch range where this starts to become an issue.

12-31-2005, 10:04 AM	#6
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	Re: Need front drive shaft info.. My 69 K20 didn't have a cv and with just a 4" lift it was too short. Had it lengthened and then when I installed it, found it would not turn - back to the shop but luckily they cut me a deal on getting a cv installed. I was feeling like an idiot when I brought the driveshaft back to them. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

01-04-2006, 05:20 PM	#7
toolman Registered User Join Date: Mar 2004 Location: Hutchinson, KS Posts: 10	Re: Need front drive shaft info.. Don't mean to steal the thread, but a question for Yukon Jack. I just did almost the same thing on my 68 (with 4" lift also), splines were shot on the front driveshaft (which is not a CV style). So, I finally got around to getting it repaired and now with no play in the splines, the front shaft will not rotate by hand....bummer. Trying to get the daily driver fixed up a bit and keep running into little things that end up costing big bucks...guess that's the name of the game though..otherwise what would keep things interesting...ha anyway...trying to decide now whether to install shims to rotate the axle a bit, or pay the bucks to have the CV added to my shaft ? So, did adding the CV joint to your shaft take care of the rotation problem on your truck ?

01-04-2006, 07:06 PM	#8
stan79chevy Registered User Join Date: Sep 2003 Location: COVINGTON GEORGIA Posts: 477	Re: Need front drive shaft info.. my truck is a 79 but the transfer case is a 70. what i did to fix basically the same problem was change teh front output to the newer style with the square flange. that was cheaper than a new driveshaft. stan __________________ 79 chevy k20 350/350/205/D44/14bFF 4.56 gears rock LWB pimer black 01 S-10 ZR2 extended cab 4.3/4L60E/233 3.73 gear 31" DICK CEPEK CRUSHERS

01-05-2006, 04:21 PM	#9
toolman Registered User Join Date: Mar 2004 Location: Hutchinson, KS Posts: 10	Re: Need front drive shaft info.. Help me out ... I guess I am unsure of what you are saying? If I understand correctly...you changed the output yoke on the transfer case ?, didn't you then have to use a different drive shaft as well ?

01-05-2006, 04:52 PM	#10
stan79chevy Registered User Join Date: Sep 2003 Location: COVINGTON GEORGIA Posts: 477	Re: Need front drive shaft info.. yes. i changed driveshafts i had one in the garage that was the correct length. i guess if you dont have the other syle one laying around it wouldnt be cheaper for you. sorry about that im not sure what i was thinking. thats why its good to have a brother in law who is a mechanic and keeps everything. stan __________________ 79 chevy k20 350/350/205/D44/14bFF 4.56 gears rock LWB pimer black 01 S-10 ZR2 extended cab 4.3/4L60E/233 3.73 gear 31" DICK CEPEK CRUSHERS

01-06-2006, 02:02 PM	#12
toolman Registered User Join Date: Mar 2004 Location: Hutchinson, KS Posts: 10	Re: Need front drive shaft info.. Good deal.. thanks for the help..good to know that should take care of the problem at least. Ya, a new CV shaft is big bucks unfortunatly...I may do some salvage yard looking to see what I can find...as I assume when you go with a CV shaft you need a different yoke on the transfer case as well ? If I do need a new yoke, (I think I read that you have a Rockwell TC , same as mine)....where did you find a yoke to fit the TC splines and the CV shaft ? and to Stan79 chevy....thanks for the reply...I wish we just had even some salvage yards with lots of parts lying around here. Much less a brother in law..your lucky. I am the one around here that doesn't throw anything away...unfortunatly just haven't been around 4-wheel drive stuff long enough to have much...any idea what the shaft and flange that you used was out of ?



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