Q: My car won't shift into 3rd, 4th, and reverse.

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My 94 Nissan pu 5spd trans was shifting fine until this past weekend. It wont shift into 3rd, 4th gears an reverse. I check fliud it was low so l topped it off...it still not shifting into 3rd 4th gears an reverse..shifts fine into 1st 2nd 5th

My car has 175600 miles.
My car has a manual transmission.

Hi there. The gears 3rd and 4th are both on the main shaft inside the transmission. Those gears have a synchronizer that connects the gears together. The reverse gear does not have a synchronizer to make the gear work. It sounds like that the reverse gear has chipped a tooth and caused the main shaft gears to grind out the synchronizer. I recommend seeking out a professional, such as one from Your Mechanic, to observe the issue with your transmission.

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