I recently pulled my 3010 diesel into my shop with plans to rebuild the engine. (Started burning oil). Over the summer I noticed it was hard to find reverse in both speed ranges. All the forward gears seem just fine... I rebuilt the shifter and adjusted the linkages. I say its hard to find like there is not click from the detent. I kind of have to feather the shifter. Are there serviceable detents from the top cover on these? Or should I be looking at somthing else?