Drive shaft question

After my tranny yoke debacle, I was sanding and repainting my drive shaft. Question to the FABO brain trust: Is the drive shaft directional? Is there a fore and aft? Both ends take the same 7260 U-joint, but I noticed one end has three weights on it, while the other has two. I marked mine with a cable tie so I can install it as it came out. Forgive my ignorance, but I'll store the answer in the hard drive in my head. Thanks to all. Paul.

Not on that type. On the ones with the insulator, yes

The weights are for balance, right now it has a neutral balance which is what you want.

BTW... That's purdy!

Thank you, sir.

Yes it is. Very nice job. Would you care to reveal the paint you used
Thanks

I never understood what was meant by a *7260" or a "1350" or a 7290 or whatever other number is assigned to a yoke/ u joint

volaredon said:

I never understood what was meant by a *7260" or a "1350" or a 7290 or whatever other number is assigned to a yoke/ u joint

Click to expand...

it's the size of the joint.
7260/7290 are the "dodge" numbers vs 13 series for basically everybody else.

naturally there's a little more to it-- type of bearings, locking mechanisms and location, etx.

yokes come in different ratings and thus sizes so naturally the joints would as well.

pa340dart said:

Yes it is. Very nice job. Would you care to reveal the paint you used
Thanks

Click to expand...

I don't mind at all. After all the years of help and advice I've received from FABO members, I'll jump at the chance to help someone. I used my trusty HF RO air powered sander and some 80 grit for most of it, and a drill and dremel tool for the ends. I bought the paint at my favorite Irish store, O'Reilly's. It's Seymour 316L Stainless Steel Finish, I've attached a photo. 1 can covered it nicely. Please note, you must shake it for about 10 minutes, or else it'll sputter and spit big drops on your project. Shake, shake, and shake some more! Paul.

Thank you

volaredon said:

I never understood what was meant by a *7260" or a "1350" or a 7290 or whatever other number is assigned to a yoke/ u joint

Click to expand...

7260 and 7290 are reference numbers, but not part numbers, for the smaller and larger cross and roller universal joints commonly used in most Chrysler passenger cars and light trucks from the late 1950s into the 1990s. These were made by the Chrysler Detroit Axle Plant, as well as propeller shafts (aka drive shafts), axle shafts, rear axle assemblies, yokes, etc. The plant operated from 1917 (under Dodge Brothers until 1928) into 2010 on Eldon Avenue in Detroit, Michigan.

Other series are essentially based on Spicer references and include 1110, 1310, 1350, and 1410 series. The 1330 series was used in Chrysler and Imperial vehicles with constant velocity joints and as a single joint in 66-67 GTX and R/T. The 1350 and 1410 series were used in some larger truck applications. The 13xx series is used in other brands too.

The 7260 universal joints have a 2.125" yoke inner dimension with a 1.078" cap diameter. The 7290 universal joint has a 2.625" yoke inner dimension with a 1.125" cap diameter. The 1330 universal joint has a 2.781" yoke inner dimension with a 1.125" cap diameter. The 7260 and 7290 joints use inside snap rings instead of the outside snap rings used by the 1330 universal joint.

If you ever noticed the word "DETROIT" on a drive shaft yoke or universal joint, it is referring to the Chrysler Detroit Axle Plant, where it was made.

FYI...

Yup I've seen that "Detroit" on driveshafts before

I didn't see that after rust and crud removal, but I found a date of " 3 70" stamped on it. The car build date is 4/10/1970.