Noob Driveshaft ??’s

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Rich77

Full Access Member
Joined
Oct 14, 2019
Posts
102
Reaction score
37
Location
SE Wisconsin
First Name
Rich
Truck Year
1977
Truck Model
C10 Scottsdale
Engine Size
400
Hey All,

My truck is a ‘77 C10 sbc400/th350.

I need a driveshaft. I think I’ve confused myself.

To measure the length of the driveshaft that I need, I measured from the trans housing to the yoke on the rearend.
That’s 72.5”. That is how you measure your length, correct?
When I measured this, I have the front of the frame below the radiator on jackstands, and the rear end/axles are sitting on jackstands. Is that OK?

The rear yoke will need a 1-1/16” ujoint so that is a 1310 size, correct?

The length of the new driveshaft is measured my center to center of the yokes, correct?

Also, I think that my slip shaft is 27 spline?? My vision is so blurry right now.

I just want to make sure that I’m doing this correctly.

Any help is appreciated!
 

Attachments

  • IMG_3999.jpeg
    IMG_3999.jpeg
    106.7 KB · Views: 30
  • IMG_4002.jpeg
    IMG_4002.jpeg
    146 KB · Views: 36

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
29,062
Reaction score
23,795
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Typically, you measure from the tip of the output shaft, to the centerline of the u-joint. So even though you didn't measure from the correct spots, it looks like your current measurement will be fairly close.

Also, as long as there's weight on the rear springs and the axle isn't hanging, you should be good. And yes, a th350 has a 27 spline output.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
29,062
Reaction score
23,795
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
You must be registered for see images attach


^I stole that chart from the internet somewhere a while back.
 

Rich77

Full Access Member
Joined
Oct 14, 2019
Posts
102
Reaction score
37
Location
SE Wisconsin
First Name
Rich
Truck Year
1977
Truck Model
C10 Scottsdale
Engine Size
400
Thank you, Sir!
 

Latest posts

Forum statistics

Threads
42,013
Posts
907,442
Members
33,510
Latest member
dstack12
Top