Repalcing rear seal in 700r4 tranny - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-03-2003, 11:02 AM
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Repalcing rear seal in 700r4 tranny

How hard is it to replace the rear seal on a 700r4 tranny? I notice that intermittantly my tranny will loose a lot of fluid on the driveway if it sits for a few days and other times it doesn't. My driveway does sit at a 20 degree angle so could that be forcing all the fluid to the back of the tranny putting to much pressure on the rear seal?

Regards
Mark

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Old 07-03-2003, 10:54 PM
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nothing to it.
pull the driveshaft.
knock out the old seal with a flat head and hammer (gently).
knock in the new one rotating blows until flush.
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Old 07-03-2003, 11:25 PM
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Don't change the seal! BACK your car into the driveway and hope the front seal isn't bad.
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Old 07-04-2003, 12:10 AM
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When the trany. isn`t turning,there is no pressure. Look real close, it could be the front yoke. There is a soft plug in the end of the yoke, some have a small hole in the center,when u park up hill it will leak.

To fix it pull the tail houseing ,there is a funny looking seal holder there with an O ring,fits inside the yoke,in front of the bushing.

Or plug the hole in the yoke. If it still leaks then put a seal in.
HTH
Good Luck.
Troy;
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Old 07-04-2003, 06:53 AM
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As mentioned, check the O-ring in the sealing sleeve on the out put shaft if one is there. removing the tail housing wil reveal this.

Also check the drive shaft yoke for wear and replace the rear bushing that the yoke rides on too.

If the bushing is worn heavily , replacing the seal will not do a great deal to stop oil leaking out
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Old 07-05-2003, 08:25 AM
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Crosley is correct, if the bushing is worn it will do you no good to replace the seal.

Vince
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Old 07-05-2003, 10:48 AM
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So does that mean a complete tar down if the bushings worn?

Regards
Mark
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Old 07-05-2003, 11:44 AM
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You should already have the tail housing off,the bushing is just behind the seal,brass with lots of little holes, knock it out install a new one, done. HTH

Good Luck

Troy,
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