If your transmission is a 700r4 (4l60) you have a reverse band that engages when you want to go in reverse. since it drives forward your low reverse clutch and your fwd clutch are working. This leaves the band which was probably slipping now is not engaging.
Since the fluid is burnt is a indication of overheating probably caused by the clutches slipping and the trans left in overdrive in speeds lower than 40 mph. its possible that you have a pressure problem but you need to remove the pan and inspect for any metal or clutch material. but you will probably have to have it rebuilt or find a good used one.
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it is a 700R4. Is there a possiblity of a spool in the valve body not moving properly? The oil is now burnt. Im pretty sure I'll need to rebuild or maybe try a junk yard tranny.
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