700r4 (rear) drive shaft leak - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-28-2011, 01:08 PM
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700r4 (rear) drive shaft leak

I just replaced all the seals in my 700r4.

Now my trans is still leaking from the rear. It looks like its coming from the rear seal. Does my driveshaft need a sleeve? What is a sleeve and where can I get one? My car has 134k on the driveshaft. ( I did all the work last month and I believe my drive shaft yoke has some wear.

what if I took my drive shaft to the "driveshaft shop"

help, thank you

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Old 03-28-2011, 07:46 PM
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If the yoke has a groove worn into it then that would be a problem.I've never seen or heard of a sleeve for a yoke.Harmonic balancers yes but....
You could find one in a junk yard or just get a new one for around $50.00 As far as taking it to a shop it would cost as much if not more than a new one.
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Old 03-28-2011, 10:12 PM
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does anybody know if a 30 and 27 spline (700r4)transmission use the same driveshaft (yoke)

thanks
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Old 03-28-2011, 10:52 PM
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Is the bushing in the tail shaft housing worn out. If it is, you can replace seals all day long and it will still leak. Just my 2 cents.

Keith
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Old 03-28-2011, 11:19 PM
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Quote:
Originally Posted by vetteman2
does anybody know if a 30 and 27 spline (700r4)transmission use the same driveshaft (yoke)

thanks
All 700R4 and 4L60/4L60E have a 27 spline output shaft. The reference to 30 or 27 spline with these transmissions is for the input shaft where it engages the torque converter.
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Old 03-28-2011, 11:32 PM
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thanks

1 more thing..........

If i jacked up my front end and put it on jackstands....right before this (whole episode)

could that be the cause?
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Old 03-29-2011, 01:11 AM
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Jacking the car up will let the oil in the pan run back into the tailhousing, so yes it could lead to this. If it leaked then it should stop leaking when the car is set back on the ground and the oil has time to return to the pan.

This would also be a good sign that the rear seal is old and needs replacement, or the slip yoke has a groove worn in it where the seal lip rides on it and needs replacement also.

There is also either a gasket or an O-ring between the tailshaft housing and the transmission main case that may leak in that situation and need replaced also.
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Old 03-29-2011, 09:23 AM
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If you need a slip yoke... Spicer 2-3-6081X for 1310 Joint
GM part# 7812557 for 3R Joint
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