i have a world models spitfire with pre installed retrakts,i hooked up the servo,when my retraks are down its O.K,when there up there a bit floppy whats the problem

It sounds like your using a standard servo and not a retract servo. I Have been able to get away with some higher torque servos with out a retract servo to solve the problem.

it is a retrak servo the tork is 80

If this is like all the mechanical retracts this co puts out in all their models, there is not much you can do, but to replace them with phneumatic uints. They are just cheaply made and come with a lot of slop. If the retracts are down and locked and still wobble, that is how they are. I wish these co's would just sell the model sans retracts and cut the cost. this is what Top Flight did with their Mustang. They ship it with fixed gear that can be removed and Robart gear fits right into the mount.