Well we got an 89 T 5 tranny for my car. I got it back today, one complaint. Grrr. It seems to want to jump out of first gear. I think I found a way around it, if i hold it in first and give it alot of gas on take off its okay. My dad said he might try to adjust the clutch and see if it helps. Any idea's? I hope its not the synchro's.
The mechanics said they drove it around with no probs.

The T-5 I have in my garage right now is in about the same condition as yours and I had to give $200 for it. It was out of a '90 5.0 with 146k on the clock. I don't think it's the synchros that are causing your problem . A bad synchro will grind as you shift into a gear rather than fall out of. I haven't had a T-5 apart yet to see, but most trannys have 3 or 4 little detents on the synchronizer hub assy. that are spring loaded outward and retained by a spring clip. These detents ensure that the synchronizer hub sleeve, when slid over to either the 1st, 2nd, 3rd, or 4th gear hubs, stays locked to that hub. The synchronizer rings themselves, are only responsible for lining up the next corresponding hub for the gear exchange. If yours is comming out of gear, especially under a load or just letting off the gas, these detents or that spring clip is probably damaged. You may even have to replace the whole synchronizer hub assembly, if you can't get the detents or the spring clip(s) seperately.
We all know the T-5 is a lighter duty trans but there's guys here at the track runnig 11's on a slightly updated T-5's and another runnig 12's on his stock AOD. A friend of mine had a T-5 in his 84 hatch and he drove it like there was a race every day. And in return that tranny was out of the car just about as often as the oil changes.
I'm a good driver, I think I just end up with junk trannies that have been beat to hell before me.