Club Cobra - Problem with Toploader and slip yoke...

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Problem with Toploader and slip yoke...

I just rebuilt my Toploader. Installed a new seal and new bushing. I bought a new slip yoke off of Ebay...to fit a C6 or a Toploader. (My trans BTW is 31 spline...big in, big out) I lubed up the slip yoke and put it in. After about the first inch, it was really hard to push in. I lightly tapped it with a ballpene hammer and it went in. To get it out, I had to put a piece of wood dowel in the u-joint bores and then tap it back out with the hammer.

I noticed, however, that if I turned the yoke 180 degrees, it went in without a problem and comes back out just as easy.

What gives?

The slip yoke is missing a spline inside...doesn't look broke but machined that way. Is there a missing link here?

I would think that if the shaft was bent or the bushing was boogered up that it would be hard to insert no matter what orientation the slip yoke was in. But when I turned it 180 degrees, it slid in easily and the trans spun freely with nothing but drag from the seal.

Any ideas? It has me stumped.

I'm sure I could run it as is without a problem...but stuff like this just tends to puzzle me a little.

Is the copper bearing you put in it bent or out of round?

DO NOT TURN THE yoke in the tail, it will tear it up!!!!

Give me a call.

:D

Dave, if it was bent or out of round, the slip yoke would bind up no matter which way I put it in. I can put it in this one way...and it slides in without a hitch and spins very freely....when I pull it out, there's not a mark on it. Smooth as a baby's butt.

SO, it snags as you turn it?

Is the yoke out of round?

Or........did you do something to the output shaft? Can you turn the output shaft without the yoke involved?

There has been a missing spline on every yoke I have seen for a C6 and Big I/O top loader.

Does not snag as I turn it.

Yoke doesn't appear to be out of round.

Output shaft turns perfectly without the yoke. I've ran it through every gear a million times...everything is great.

When I put the yoke in a certain way, it's just very hard to push in/pull out. However, I can pull the yoke out, turn it about 180 degrees (or so) and push it in without any problems.

I think you have a yoke with a blind spline for alignment. It may be something to do with balance of the shaft.

Shouldn't there be a matching spline on the output shaft?

I would think there would be one.There should be a wide spline on the out put shaft to match where the one is machined out.You might give David Kee a call.

I sent him an email...but what you're saying makes sense....I need to check that out after work today. I've never ran across that before...

Well I looked the output shaft over real well....no thicker splines to match the missing spline in the yoke. Back to the drawing board.

Found the same problem with mine.:mad:
Ended up finding the best spot for installation & left it at that.
Works great, slides in & out smoothly, no vibration.:D
I am sure there is a master spline in there somewhere, just very difficult to see or find when working under the car with limited space.
Wearing bi-focals doesn't make it any easier either:(

Craig

Guys:
The slip yoke has a "key way" built in it and it sounds like there is a burr on the output shaft. By turning the yoke 180* you probably got lucky and the key way went over the burr and allowed you to slide the yoke on. This happens on occasion with the TKO.

Richard
Tech Support
Keisler Engineering