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Old 11-08-2009, 11:52 AM
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700r4 questions

I have a '87 core that has been rebuilt before and has some odd stuff going on inside. first of all it seems that an 87 should have an aux valve and it doesn't. next some of the are for a later trans but the valve body checks balls are set up for an early. it is a "K" case. the question is should I build this or find a different core? can the aux valve be added or is this a bad Idea? the trans will be going behind a pretty mild big block.

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Old 11-08-2009, 03:46 PM
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Aux valve body can not be added to the trans case.

1987 is a split year when GM changed the 700-4L60 trans with the aux v-body and other changes.

Early 1987 trans would not have the aux v-body
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Old 11-08-2009, 04:19 PM
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how important is the aux valve to the strenght and durabilty of the transmission
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Old 11-08-2009, 05:43 PM
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Quote:
Originally Posted by jeepguy48
how important is the aux valve to the strenght and durabilty of the transmission

none... it is basically an accumulator assembly.

The part of the upgrade by GM in that year is the v-body design - calibration and reconfigure of the aluminum drum
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Old 11-08-2009, 05:55 PM
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thanks for all the info. does this mean that I should get a rebuild kit for an earlier trans as far as the vb recalibration kits go?
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Old 11-08-2009, 07:27 PM
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also what is your thoughts on wide band versus stock width band and the reasons. thanks again for the input
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Old 11-10-2009, 02:41 AM
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Quote:
Originally Posted by jeepguy48
thanks for all the info. does this mean that I should get a rebuild kit for an earlier trans as far as the vb recalibration kits go?
You should use a rebuild kit for a NON-auxiliary transmission.
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