Question about 1988 Chevrolet K2500
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Posted on Jan 02, 2017
FIRST CHECK TRANSMISSION FLUID LEVEL.IF FLUID LEVEL IS GOOD. YOUR PROBLEM COULD BE THROTTLE CABLE IS BINDING OR OUT OF ADJUSTMENT.YOUR GOVERNOR IS DAMAGE OR MISSING PARTS.YOUR OIL PUMP PRESSURE REGULATOR VALVE OR TV BOOST VALVE STUCK OR DAMAGE NOW .IN THE VALVE BODY.STICKING LINE BIAS VALVE TV LIMIT VALVE MODULATED TV UPSHIFT OR DOWNSHIFT VALVES.OR A STICKING THROTTLE VALVE PLUNGER.STICKING OR STUCK 1 -2 2 -3 3 -4 THROTTLE VALVES OR PRESSURE REGULATOR VALVE.THE SPACER PLATE GASKETS DAMAGE.ALSO THE 2 -4 SERVO ASSEMBLY ACCUMULATOR DAMAGED.THE 2 - 4 BAND BURNED OR ANCHOR PIN NOT ENGAGED.
Posted on Aug 31, 2009
you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps
Posted on Dec 16, 2009
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