My 90' 300ZX will not go in reverse
I recently purchased a 1990 300ZX with an automatic transmission. Everything was working fine the first couple of days of driving it, but on the third day I've run into a major issue. While cruising around the city of Chicago I came to a red light and was a bit in the intersection so I threw the car in reverse to back up, but the car wouldn't roll backwards. I tried giving it some gas and the car still wouldn't roll backwards. I put the car back into drive and headed back home. I parked the car in the garage and again tried to get the car to roll in reverse but it wouldn't. Now that the car is stuck in the garage, I decided to put the car in neutral and tried to roll it out of the garage, but the car would not budge.
The next day my mother's boyfriend came over to take a look; he's not a mechanic or car expert but he was able to help me test some things out. We put the car on some axel stands leaving the rear tires free to spin. Obviously when we put the car in reverse and gave it gas the tires did not spin. We then put the car in neutral and tried to manually rotate the rear tires backwards. The tires did not turn easily and we had to put in a bit of effort just to get them to rotate a couple of inches; however when we tried to rotate the tires forward they spun with ease. We then put the car in Drive and the tires starting spinning forward no problem.
From some of the research I've done so far online I've discovered that I may have some type of transmission issue, so I contacted the seller to get any information on the transmission that he had and this is what he told me...
He had a rebuilt transmission put into the car approximately two years ago. Since then he has only put on approximately 1000 miles on the vehicle as he hasn't really been driving the car for the past two years. The shop where he had the transmission work done is no longer in business and that there was only a 1yr/12,000 mile warranty on the transmission. Not sure if he's lying but he did promise to bring me the receipts and such for the transmission work this evening, which hopefully will allow me to verify his information.
Does anyone have any idea what could be the issue with the car? I'm really confused as to why I can't get the car to roll backwards in neutral. Any help would be greatly appreciated and let me know if any other information is needed to help figure out what is wrong.