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Does it have floor shifter ? Shift interlock system . Diagnostic Trouble Code (DTC) Chart
DTC
Component
Description
Condition
Symptom
Action
B2572
Brake Shift Interlock
Brake Shift Interlock Output Circuit Failure
The associated circuitry connected to the smart junction box (SJB) or fuse, or the SJB itself may have an issue causing a brake shift interlock concern.
Brake shift interlock is inoperative or does not operate correctly.
Go To Pinpoint Test A .
SYMPTOM CHART
Condition
Possible Sources
Action
Shift interlock system does not release/lock correctly
Circuitry open/shorted
Fuse(s)
Stoplight switch
Go To Pinpoint Test A .
Shift interlock system does not release/lock correctly
Shift lock actuator
INSTALL a new selector lever assembly. REFER to Selector Lever in this section.
take it back to the shop that rebuilt it and tell them to readjust the throttle pressure cable. if its shifting early then you will damage the transmission from having to low pressure
-very important check for brake light when pressed (outside rear)
-did u recently change any bulb at the rear if yes recheck if it the right brake light bulb 1157
u need to do a dignostic for the d4 light and it will lead u to the problem
Since all gears shift hard, and the transmission is in correctly (i assume) then it will be a linkage or spring type of problem in the shift mechanism or hook up to the trans. I also assume you have put back all the correct parts.... Last time i r/r a tranny that was like this, i didn't hook up the shift levers right... Rick
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