I know this is a common problem when things aren't right. What I want to know first before I remove the tranny for inspection is this. My Hydraulic lift control valve leaks bad especially when I shut it down it pours out both ends of the rod that the up & down lever is connected to. I'm sure since this system shares the same fluid this leak is allowing air in the system. Would this cause the tranny to loose power. It creeps good but when I increase the speed it squeals, & jerks with very little to no power. I checked the manuals but found no parts diagram on the tranny just the drive unit. I'm assuming this is an Eaton 10 ? If anyone has a diagram of this tranny & the control valve I would appreciate it. Rebuilding the control valve would be a quick fix hopefully.
Just for the record: The fins are clean, not running hot, fluid level is good, no water, changed the filter, belts aren't slipping, drive belt tension is good. One thing I don't like is the hose leaving the reservoir going into the top of the tranny has a loop that goes slightly up above the bottom of the reservoir then across into the top of the tranny...hose too long I think. I did notice air pockets in the hose. The fluid level fluctuates on the dip stick but not in the hot zone. I know its pulling fluid but I don't like the air pocket in the hose...is this ok. Really appreciate your help always as usual.