i drove my my dads house today,and when i at about 30mph,the car started thumping,like someone was kicking it..this was at about 25mph and the RPM'* were jumping from 2k to 1k...and then it did it again when i was about 50-55 mph and the RPM was staying still..it was fine after about 5-10 when i stopped and drove again.

oh god i hope its not the new tranny i had put in!...

engine/tranny mount issues, perhaps? wild guess.

Do you have a service engine soon light?

I would check the distributor. My '89 se had the same problem, and replacing the distribuor got it fixed.

Distributor? We ain't got no stink'n distributors!

well, i meant the Ignition Module... it is essentially an electronic distributor isn't it?

Yes. I would also like to know if/when the plugs, wires, etc. were replaced.

thanks for all your help,turns out at the module,wher all the wires plug into, there was a big crack in it!,,and it would do this on a rainy day,and there was ripped rubber on the wires too!...i replaced them and shes running fine now,RPM'* flactuate less now

thanks for your help again

As for the case with my car, replacing the ignition module was what fixed the problem. I have replaced the plugs, but that was a while after I took care of the "thumping" issue...