Driveshaft help!

[Stano]

I am having a delimma with my 67 LWB chevy. Several months ago my built turbo 350 went south. I finally found me another tranny but this time its a TH400. Now in total length its a half inch longer than my 350 but thats not really the issue. My problem is that the one piece driveshaft i was using is now too long to use with a 400 slip yoke. All my other 2 piece shafts are all wrong too! The 400 yokes I have are 8 inches or so long and only 2.5-3 inches or so actually slide into the tranny and thats all the way in, leaving a considerable amount outside the tranny and no room to move either. I have a new yoke waiting for me at the parts store in town but its way too long also. Money is a big issue for me so its not as simple as just have a new shaft made. I need to know what you all are running for drive shafts and tranny yokes on your long bed 2wd 1/2 ton with a 400turbo. By the way my engine is in the stock v8 location, and the 400 is short tail shaft. Let me hear from ya cause this is driving me nuts.

Stano

[Longhorn Man]

You don't need to get whole new drive shaft, they can cut it down for you for much less. I think I can have it done locally (ballanced too) for less than 100 bucks.
Figure in the down time, the new U-joints (and carrier bearing since you won't find a one piece shaft) and labor if you farm it out for this work, and the 100 bucks may actually be cheaper.
Onless you get lucky and find a direct bolt in set up for cheap.

[Stano]

Its not really the driveshaft, its when the yoke is on the shaft it makes the whole thing too friggin long. Won't slide into the tranny far enough. The yoke I ordered from parts store for the truck is like 8+ inches long 6inches of that is the barrel of the yoke and almost $100. I had one here like the one I ordered. Is there a shorter yoke for a 400?

[Longhorn Man]

I didn't notice the part where you said the tranny is only 1/2 inch longer than the old one...

I have one here that is about 3 1/2 inches long...the slip part is 3 1/2, the whole unit is 6 inches from strap mounting surface to tip. Good holes, slip surface has no rust...$30 to your door. I can get you a pic here in a min if you like.

[72C203503ONTHETREE]

If its just the yoke thats too long, just cut some off the end of the yoke and chamfer the new edges.

[Stano]

Longhorn man if ya got a pic that would be great. I looked up in the tail housing and there seems to be a ring of some sort on the output shaft that stops the yoke and there are no splines beyond that. I need a yoke for the 1310 series u-joint. The yoke u have, does it have a bolt hole in it for it to bolt to the output shaft. My dads is like u describe but has a hole to bolt it to the tranny on his 78. I need one without the bolt hole.

[crazy longhorn]

the best way I know, is slide the slip yolk in the 400 t till it bottoms, then pull it back 3/4 " & measure center of caps to center of caps to get the shaft lenght. to cut & balance the shaft is no big issue($75-100). Good luck,crazyL

[Longhorn Man]

No bolt hole...as a matter of fact, it is open in the end. It says spicer on it...NFC on the 1310 series u-joint or not...never used it.

[Longhorn Man]

Oh, remember, a dollar bill is about 6 1/8 inch long. That's why I have it there to show the size.

[Stano]

Long horn man the opening for the u-joint is 3 1/4 inches across and the cap dia. is1 1/16 of a inch. That looks like it might work if its for the right u-joint. I have one more place to check here locally that i was just informed might have one if not I will be gettin touch with ya if it will fit my u-joints.

Stan

[Stano]

My first clue should have been, when the dude at the parts store here in town that ordered me one asked "Turbo 400?.....Is that a chevy engine?" I hate O'Reilly's

[crazy longhorn]

Originally posted by Stano
Longhorn man if ya got a pic that would be great. I looked up in the tail housing and there seems to be a ring of some sort on the output shaft that stops the yoke and there are no splines beyond that. I need a yoke for the 1310 series u-joint. The yoke u have, does it have a bolt hole in it for it to bolt to the output shaft. My dads is like u describe but has a hole to bolt it to the tranny on his 78. I need one without the bolt hole.

I ran into this one time.....take a look at the end of the tail shaft on the 400. Is it drilled & threaded? If so, they do have a stop inside for the yolk(not a slipyolk, but a bolt on stationary yolk). My 78 3/4 ton was that way, & didnt need the slip in the trans, due to the slip in the center of the 2 pc shaft. If you have this setup, you can get around it by having a driveline shop add a slip/n/ slide to your 1 pc shaft,(like a 4x4 shaft) & run a bolt on yolk. Good luck,crazyL