700r4

[clinebarger]

Originally Posted by Already Gone

2 Questions... Do the 87/93 700's have the 30 spline shaft as well as the auxiliary valve body, and what does the auxiliary valve body ( forward accumulator ) do?
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The 87-93 4L60's have a 30 spline input & an auxiliary valve body.

The Auxiliary valve body houses the Forward Clutch Accumulator.
GM added the forward clutch accumulator in order to give a much nicer (smoother) engagement when placing the shift lever into drive, This accumulator cushions the apply of the forward clutches.


In the earlier models......Some vehicles would bark the tires when dropped into gear and/or they would chew the splines off of the forward clutches over a period of time. This was REALLY a problem on TBI vehicles with the really high idle during cold starts & people not allowing the engine to idle down.

Adding the accumulator fixed that issue......But created another one, People have a habit of not allowing the forwards to completely "latch" up before giving it gas.....Causing the forward clutches to eventually burn up.

[Already Gone]

Originally Posted by clinebarger

The 87-93 4L60's have a 30 spline input & an auxiliary valve body.

The Auxiliary valve body houses the Forward Clutch Accumulator.
GM added the forward clutch accumulator in order to give a much nicer (smoother) engagement when placing the shift lever into drive, This accumulator cushions the apply of the forward clutches.


In the earlier models......Some vehicles would bark the tires when dropped into gear and/or they would chew the splines off of the forward clutches over a period of time. This was REALLY a problem on TBI vehicles with the really high idle during cold starts & people not allowing the engine to idle down.

Adding the accumulator fixed that issue......But created another one, People have a habit of not allowing the forwards to completely "latch" up before giving it gas.....Causing the forward clutches to eventually burn up.

Thank you.. I appreciate the info.
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