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Old 01-26-2006, 03:34 PM   #1 (permalink)
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Gear selector shaft seal?

I've just finished my new 351/c4 setup and have discovered acouple leaks.

Fist off I'm leaking from where the dipstick meets the case, no biggie. But it also appears to be leaking from the gear selector shaft! Is it possible that I could have damaged the seal while modifying the selector for my b&m cable?

If so I was wondering if the seal can be replaced on the outside or do I have to go into the tranny to do it? Its in the can so I can't really tell.

I got some pics to help yall...







Any help and suggestions will be appreciated!
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Old 01-26-2006, 04:04 PM   #2 (permalink)
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Gear selector shaft seal?

There is an o-ring under that nut in the center of the shift lever, it may be the one leaking and is easily replaced from the outside (drain the fluid alittle). You would have to drop the pan to replace the seal for the outer shaft. If you are not using the kick-down , its probably best to remove it during assembly (too late now...comes out on the inside of the trans) and plug the hole with sealer.
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Old 01-26-2006, 04:07 PM   #3 (permalink)
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Gear selector shaft seal?

Oh almost forgot....since you removed the standard shift lever/s, you will probably have to put a washer under the bolt so the o-ring has something to seal against!
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Old 01-26-2006, 05:25 PM   #4 (permalink)
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Gear selector shaft seal?

Is there a washer that goes between the nut and the o-ring?

I went out there and checked that nut, it was a little loose (maybe I loosened it trying to get the stock shift arm off?)

I tightened it a little and then noticed there is a little play in the stud. I went into my shed and checked my spare c4 with is completly stock and there doesnt appear to be a washer between the nut and the o-ring and seems to have no play in it.

I think tightening the nut that little bit might of done the trick?! I cleaned the whole area down, I'll wait to put it under pressure before getting happy though... and I still have to pull the passenger header to fix the dipstick leak!

Heres a couple pics I shot of my spare c4-











<font size=-1>[ This Message was edited by: 351wNotch on 1/27/06 8:26am ]</font>
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Old 01-27-2006, 01:05 AM   #5 (permalink)
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Gear selector shaft seal?

See the lever with the spring and cable on it? Thats the kick down lever....you have removed it. Behind the lever is the o-ring....it is sandwiched between the shaft and the lever to seal it. If you put a large washer on there, it will do the same job as the kick down lever would do....press against the o-ring. The ring is obviously not there as you would see it sitting under the nut...it resides in the little channel between the shift lever shaft and the kick down shaft.
Be careful you don't push the shaft into the trans when you remove the nut.

<font size=-1>[ This Message was edited by: cmf60 on 1/27/06 4:07pm ]</font>
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Old 01-27-2006, 03:16 AM   #6 (permalink)
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Gear selector shaft seal?

Just to add it nneds the washer or the oring will drop onto the flat sections of the thread but make sure it is still free and doesn't bind on the selector shaft.
Fit a new distick oring,make sure the tube is centralised and not pulled over one way by the mounting bracket.
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Old 01-27-2006, 09:59 AM   #7 (permalink)
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Gear selector shaft seal?

I bought the transmission thats in my car without the kickdown lever on it, I put a washer behind the nut and also replaced the o-ring night after looking at the other transmission, the dipstick on the other hand is going to be a huge pain in the ass I can already tell, I don't know its possible to loosen it up with the bell on? Its a lokar.
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Old 01-27-2006, 05:23 PM   #8 (permalink)
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Gear selector shaft seal?

OK, Some one please come over and punch me right in the face!!! I feel like a complete dumbass now!!!!
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Old 01-27-2006, 08:15 PM   #9 (permalink)
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Gear selector shaft seal?

Umm why? you have to tell us now.
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Old 01-27-2006, 10:10 PM   #10 (permalink)
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Gear selector shaft seal?



I'll just say that I made pulling the dipstick tube out to be more complicated than it actually was...

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Old 01-27-2006, 10:15 PM   #11 (permalink)
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Gear selector shaft seal?

If no one else had previous knowledge of c4s and you asked them how its hold it one might think that its screwed in possibly?!

But I'm pretty sure it good, I'll know tomorrow once I crank it up and put it under pressure!

And btw, the washer kind of worked for the selector shaft, it still dripped a little from the flat spots on the stud. So I went ahead and took the kick down lever off the other transmission and put it on mine, it seemed to have done the trick!
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