The dash board lights,tachometer,speedometer,and trans. lights stopped working, and the trans does'nt work properly (rough shifting and starts off in 2nd or 3rd gear)
SOURCE: trouble codes
You might want to check for a mouse nest under the Underhood fuse block, seen them chew up wiring under there many times.
SOURCE: 1998 Chevy Cavalier-electical
youve either got a bad connection at the new battery or the power wire is shorting out did he have too pull the cables too get them too fit?
SOURCE: 1997 blazer sluggish in drive reverse is fine
P0740 is TCC circuit malfunction P0753 is shift solenoid A circuit electrical P0758 is shift solenoid B P1406 is EGR pintle position and P01860 is TCC circuit.
SOURCE: 1995 chevy k1500
Sounds like a simple fuse problem. Try checking and replacing fuses inside the truck and under the hood as well. check them ALL, as some fuses say they control one thing, but end up controlling more than a few :)
SOURCE: 4l60e slips in 3rd and 4th
There are to many things that can cause this problem, best thing to is go get the ECM scanned for DTC codes at a transmission shop or Auto zone or Parts Source since they scan for free.
The ECM should have DTC code in it's memory on how the transmission is Performing and have the Transmission line tested for Fluid pressure.
Good luck and hope this helps. Oh and also ways check with more then on transmission shop if there tell you that you need a new Transmission,
It could be a simple as the transmission filter falling off causing the lost of transmission fluid pressure. Check the transmission fluid too.
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Two forward gears only
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Gear missing or slipping
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No upshift or slipping upshift
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No downshifts
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Non-First gear start
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Refer to First Gear Range Only - No Upshift .
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Refer to Third Gear Only .
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Refer to Second/Third Gear Only or First/Fourth Gears Only .
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Refer to Slips in First Gear .
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Refer to Slipping or Harsh 1-2 Shift .
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Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .
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Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .
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Refer to No Part Throttle or Delayed Downshifts .
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Refer to Second Gear Start .
Trouble Code: P1870
Transaxle Component Slipping (4T60-E)
Trouble Code Conditions: DTC P0502, P0503, P0740, P0753, P0758, P0785 and P1860 not set, engine started, vehicle driven to a speed of 30-82 at an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from 8-35%, commanded gear not in 1st gear and the gear range is D4, TF
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