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700R4 question, please help?

Old Mar 5, 2009 | 08:27 AM
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From: Grand Sport #82
Default 700R4 question, please help?

I have a problem with 88´vert that is leaking around this area on the gear box.

What is this part?

Can I just remove it, by removing the clip, and change the gasket?



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Old Mar 5, 2009 | 09:12 AM
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From what I remember that is the 3-4 servo and it has a seal. The ring can be a bit of a pain to R&R. I had to drop the exhaust to work on it but didn't need the special cover tool as shown in the FSM.
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Old Mar 5, 2009 | 10:29 AM
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Correct, it is the 3-4 servo. The clip can be removed with 2 small screwdrivers. There is a large 0-ring on the servo cap that is probably leaking and can be replaced. You'll have to push the cap in (wedge something against the tunnel) to relieve pressure against the clip and then work the clip out.
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Old Mar 5, 2009 | 03:11 PM
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From: Grand Sport #82
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It can be removed, and the seal replaced without getting into the gearbox internals?


Dosent sound like a big deal?

BTW. The gearbox is allready off
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Old Mar 5, 2009 | 03:16 PM
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From what I remember the cover has an O-ring that had a sealant on it. Then inside there's a seal on the servo that points inward. It's pretty basic, no gearbox internals.
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Old Mar 5, 2009 | 03:51 PM
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If the tranny is out, it's a piece of cake. The oil you see is from the outer 0-ring in the cap leaking. Take the cap off, clean the cap and the bore, install a new 0-ring with oil and pop it back in. Don't need to touch the springs, rod and pistons inside.
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Old Mar 5, 2009 | 03:57 PM
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From: Grand Sport #82
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Originally Posted by 383vett
If the tranny is out, it's a piece of cake. The oil you see is from the outer 0-ring in the cap leaking. Take the cap off, clean the cap and the bore, install a new 0-ring with oil and pop it back in. Don't need to touch the springs, rod and pistons inside.
The tranny is in the car, but the exhaust is off. The car is on lift, so it is easy to reach the cap.

Cool, sounds like an easy fix.
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Old Mar 5, 2009 | 04:34 PM
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They make a tool for that ,it bolts to the bottom of the trans .You remove the 2 bolts that hold on the pan and the tool bolts just below the servo,it has a lever on it and you pull up on the lever and it pushes in the cap and remove it.
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Old Mar 6, 2009 | 11:05 AM
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Very easy to do off the car. I don't know about on the car. When mine was on the table, I just used a large, 24" Irwin quick-clamp to compress the spring and then removed the snap-ring (this was with the pan off though). Use vaseline on the new o-ring. If you can get a clamp to reach the other side, that'll be easiest. If not, try and wedge something against the tunnel, but use a wide piece of wood or something to spread the force more to prevent puncturing the tunnel.

-Jonathan
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Old Mar 6, 2009 | 11:43 AM
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I used a plastic "dead" hammer head wedged between the tunnel and the cap to push the cap in slightly while working the clip out. The tool sounds pretty good though. That cap can be pretty tight.
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