aiight did u just let them keep throwing out of gear or u forced it to stay in gear? i had this problem before my 5th and 4th gear always kept popping out and people told me that it might be my syncros or a bad clutch i was like shyt, so i flushed out my mtf and only like a 1/4 of a quart came out which there is suppose to be 2.1 quarts in there. so i filled it up took it on the road and nothing eversince, runs like new again. but first u might have to find out where ur fluid is leaking