Td8e transmission problem

[Mowit]

Td8e that has been sitting in a barn for 3-5 years and recently got it running. Runs good steers good and goes thru all the gears smooth. But the problem is after driving for a short distance the dozer starts slowing down, the drive shaft also slows down. Filter and fluid has been changed and screen cleaned with no debris in it. Any suggestions what to check next ?

 

[Acecadet]

Is it the short or long transmission? If it is the long transmission, the fluid in it has to be checked while warm and running. Dipstick is under the floor boards.

 

[Mowit]

Is it the short or long transmission? If it is the long transmission, the fluid in it has to be checked while warm and running. Dipstick is under the floor boards.

 

[Mowit]

It's the short transmission. Fluid level is good, I'm thinking it may be a bad oring or cracked hose sucking air.

 

[Acecadet]

Does your clutch pressure gauge drop off at all when it gets warm?

 

[Mowit]

Unfortunately gauge is not readable glass is foggy.

 

[R.D.G013]

If the driveshaft slows down, does the engine revs slow down as well or is it at full revs but under load because of a transmission problem. Sounds more like a fuel supply problem to me if the engine revs drop as well.

 

[Mowit]

Engine runs fine. No surging or loss of power from engine.

 

[g_man]

Torque converter ??