First off, I want to say I recently purchased a '66 f100 long bed with a 240 I6 and a 3 speed. I've trolled this forum quite a bit when deciding on my purchase and it's nice to see such a helpful group of owners and I hope to be able to contribute soon.

Now to my question/issue;
I noticed that the splines on the slip yoke coming off the intermediate drive shaft are exposed by about 2 3/4 inches after the bearing. Is this normal or what do I need to do to repair this? Thanks ahead of time for any help with this.

I hope the picture helps explain things.

 

Yes it is normal or atleast pretty common.

I have a 66 with a 352 and a 3 on the tree, and I have atleast 2 inches showing.

 

Thanks!! I was worried that it might pop out and give my truck a kick stand .

 

I'm not sure of the spec, but it was designed so when under load & the springs are flattened, the splines slip into the carrier bearing housing. The rubber insulator surrounding the bearing looks cracked & worn though.

 

Bent has it exactly right. As the suspension goes up and down the geometry of the driveshaft to axle changes. When you have no load, you see what you see now. When the truck is loaded and the springs are compressed or you hit a bump, the driveshaft has to get shorter. The extra space on that spline shaft gives everything room to move. If you just had a single driveshaft that ran all the way to the tranny, it would be the same, the shaft would be just shorter than bottoming out in the tranny. Ive seen what happens when they dont get the driveshaft length amd geometry corrent on lifted 4X4's, its not pretty, and Im sure you can figure that out.

And yeah, get yourself a new carrier bearing/rubber part. That one is hosed. Can and will cause extra driveshaft vibration.

 

That makes perfect sense, thanks. I was planning on replacing the carrier bushing as my next project. I'm currently adding a power brake booster and rebuilding the drum brakes all around as they were pretty much shot. Thanks again for the help.

 

Welcome to FTE

D9TZ-4800-A .. Driveshaft Center Support Kit / Available from Ford.

Kit includes all the shims, center support bearing, brackets and rubber support.

MSRP: $96.83 // FTE sponsor PARTSGUYED.COM price: $69.72.

 

Thank you NumberDummy. Where were you able to find the part number for this? Is there a parts guide with diagrams available somewhere online?

 

The 1964/72 Ford Truck Parts Catalog is available on a CD from hipoparts.com, but this part number will not be listed.

In 1979, Ford came out with this kit (D9TZ-4800-A) that included all the parts that once were only available separately.

 

Thanks again! I'll check it out. I already purchased the Ford factory service manual for my truck so I guess the parts catalog will be the next purchase.

 

I have a question about the slip yoke in that picture. I noticed he is missing the part that threads onto the slip yoke where the threads are exposed. I have a broken piece of rubber gasket which has groves on it to fit in the slip yoke. Also there is a washer with grooves in it that goes on there. What is the purpose of the rubber washer and the threaded part? Where can I buy a replacement rubber washer with grooves in it?

 

You are correct he is missing the grease seal. It doesn exactly what it sounds like holds the grease on the splines. If the grease seal was ther less splines would be showing. However my guess is the shaft was a replacement that was too long. They maybe removed the seal to make it a shorter unit by trimming the splines and keeping the seal off. I do not know where to get one besides another junk one.

 

Are these all the same part numbers,i would like one for my 65 f250 8ft bed 352/com transmission,did they make a cover to stop ingress of dirt,like a rubber shock cover as used on macpherson struts,gary nz

 

The grease seal is missing because it was never there originally.

How could you grease the splines, since there is no Zerk (grease) fitting on the slip yoke? By hand, would be the only way.

The only Zerk fitting (as original) in this location will be found on the center U-joint-used to grease the U-joints cups.

The replacement U-joints used after the 1970's do not have a provision for Zerk fitting.

Has the slip yoke been cut? The OP will have to measure it to find out.

C5TZ-4841-F .. Slip Yoke-Overall length: 7 1/8." / 1965 F100 240 I-6 w/a 129" wheelbase.

This yoke has many other applications, I only listed the one that applies.

 

My '65 F250 has a zerk ftg. on the slip yoke, as well as a knurled nut that threads onto the yoke. I suppose that these items may not be factory-a zerk ftg. can be added without too much trouble. By the way, the shaft bearing will have to taken to a machine shop to press off and on. I learned that one the hard way. Good luck.

Kurt