Most likely the year planetary drive broke or has striped out. The transmission will need to be tore down. The 4l60E even with the harness disconnected would still have forward movement without shifting.
SOURCE: Rebuilt the Trans.(4L60E) in my
did you do the rebuild or did a shop do it? it sounds like the clutches werernt done properly. if the reverse is out the other gears will go out too if driven too far in that condition,
SOURCE: 1998 GMC SIErra
Check your transmission. Look underneath the truck and see if you see moisture around the transmission pan. If you see any indication of that, you may have a huge issue on your hands. Your reverse gear is seized to the Drive Gear. However hopefully it's something like needing a new clutch or a clutch adjustment
SOURCE: no reverse and shifts hard if forward gears
best bet is call scrap yard they are fairly decent priced unless you want new
SOURCE: transmission wont shift into any forward gears or
4WD! the transfer case is not stuck in neutral is it? Fluid levels are good? Have you noticed a decrease in mileage or power prior to this problem? If no then time to take it in for service it sounds like. Transmission fluid is not consummed, so if it leaked out then you may be able to fill it up and get the leak fixed, if too late then its a rebuild on the tranny.
SOURCE: 1988 Jaguar xj6 No forward in the automatic trans rev works fine
the linkage is just a slight bit off, it parks between gears when you shift into the slots. Disassemble the shifter from the center console, and slowly move just the cable its self between the positions and see if you have forword gears. When you find and sync the gears, then tighten the cable to the shifter so the positions match the notches in the shifter.
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Most likely the year planetary drive broke or has striped out. The transmission will need to be tore down. The 4l60E even with the harness disconnected would still have forward movement without shifting.
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