F1 Front drive shaft yoke

[B_man_Al]

No this is not a "stock" yoke. Its the one the TX shop found for me and is shown in post #10. It is very similar to the one you referred to in post #33. Same barrel length, but 1/8 shorter.

 

[Ross F-1]

I went for a drive in my truck last night, after a monthlong hiatus (out of town). Funny what a fresh perspective does... On a highway with a 55 mph speed limit, as soon as I got above 45 - 50, I could distinctly feel the driveshaft vibrating. Got under there today, I don't see anything wrong. I had the driveshaft balanced < 500 miles ago, all new U-joints. I'll check the pinion and trans angles, that's all I can figure. I measured the as-sitting length of yoke from the face of the seal/trans, it came out at 1-5/8". Yippee, my seal appears to be shot, too...

 

[B_man_Al]

Hi Ross…. Is that a “good” yippee or a “bad” yippee. Attached is my understanding of how an original yoke and transmission mesh together based on the tech info I received from Steve, Ross ,Scott and others. Thanks all very much. Ross your 1-5/8” visible nominal agrees very well with my 1.7”, as I referenced the back of the casting on the transmission rather than the end of the seal.

 

[jimvette59]

jimvette59 ... I asked for a driveshaft that was 61 7/8" long (ceter of u joint to center of u joint, with 3/4 " of slip. It came out closer to 61 5/8", with about 1" of slip.

I had it made because there was no power train in the truck when I got it, but it is "stock" setup with an 8Ba and a 3 speed top loader.

The drive shaft in my 34 was like that and presented no problems.

 

[Equipped28]

Did anyone get a definite yoke or one that needs shortening for these that are easily available? As I've just picked up one of these boxes and need one. Thanks Harley

 

[1948F-1Pickup]

There is a different seal, from a C4 maybe? that has a rubber boot over the exposed part of the splines, and a flange that sets it right at the back of the housing, that can be used. A friend got it based on measurements at a Carquest shop, but he doesn't have the number. I think I will try to find it next time I need one. Not sure it would help you as the actual seal is still about flush with the face of the housing.

Old post, but here's the seal number..... National 7692S
https://www.amazon.com/National-7692S-Oil-Seal/dp/B004A6V072?tag=atomicindus08-20