5 speed transmission. From 1st to second and second and to 3rd it slides In like butter baby!!!!!! When going 3rd to 4th you can not just yank it into 4th. You must feel that slight click when in in nuetral, than slide it into 4th. Also if your no lift shifting keeping the gas pinned and just dumping the clutch when going into 4th that's a lot of torque your jolting the trans with at 4500-5000 rpm. It's Similar to preloading your drivetrain at the line or just reving it up and dumping the clutch. Usuall only one of these will result in catastrophic failure to some part.