When i go to shift into second gear, and 3rd theres a big thud for a split second. But the odd thing is it gets less and less pronounced with every gear change, but most noticeable in the change from 1st to 2nd. Its non existent in the change from 4th to 5th. Now i noticed when i go to shift and i let the revs drop to 2.5k every time, regardless of what gear im in, the thud is gone. All help would be greatly appreciated. Thanks!