JD 300B tranny problem

[Coca-Cola Dave]

My tractor has very little power going forward and only slightly more in reverse. It has a reverser. I hope I can get some helpful feedback as to what To look for and any possible solutions. I really hohpe there's an adjustment I can make. The fluid is full. I am wondering if the main pump pressure could have anything to do with it? What's the pressure supposed to be and where do I check that?
Thank you guys. You've been very helpful in the past. Thought I'd try you all again.
Southern NH guy

 

[tim s]

It could be low transmission pressure, and this could be caused by a plugged sump screen and or a clogged
trans filter, this is where you should start looking,, don't run it like this it will soon scorch the
clutches,, the main pressure will be affected by this too since the transmission feeds it,, trans pressure
should be in the 165psi area main high pressure is 2250psi

 

[Coca-Cola Dave]

Great. Thank you Tim. I'll start there.