Welcome to the forum! It's an adjustment or the rear spring is gone. These use a two spring set up to let it center when you take your foot off. So you need both springs on there. I just happen to have one torn down so you can see things. The first pic shows both springs. The one on the right is much larger and is attached to an eccentric at the front (second pic). If it is creeping fwd., then you need to ease the tension on the front spring. May not take much!
2015-07-22 17.57.20.jpg 2015-07-22 17.57.31.jpg
The position of the little crankshaft shaped ( eccentric/dog-leg/offset) piece on the front spring is your critical adjustment. As long as everything else is in order, the position of that part determines the tension on the springs. Changing the length of the linkage from the pedal to the trans only adjusts the position of the pedal at rest. The spring tension on the front spring controls the center position of the F/R
valve in the transaxle. Also check the front spring mount to make sure the spring hook is actually in between the washers on the eccentric. sometime, when the pedal is in full reverse position, the spring hook can get misaligned on the washers, causing creep.
Edited by Chopperhed, July 22, 2015 - 07:39 PM.