John Deere 2555 high range shifter

This may be a Pandora’s box question but I will throw it out there. I have a 1988 JD2555 that seems to be running just fine. I shifted into high range and shifted into 2nd gear and the diesel kept right on T it’s normal RPM but the tractor trans never felt like it hooked up. It keeps moving forward but no increase in speed, almost feels like the clutch is slipping. All the other gears in the high range did the same thing. Does this sounds like a clutch issue or is there something in the trans valve that’s acting up. I’ve never had reason to use the high range since I bought the tractor until this weekend. Fluids are good, filters replaced just don’t understand what’s happening. Low range works great.

When you state "high range" are you referring to the hyd hi-lo or manual range in trans? Yes traction could be slipping. Does foot clutch pedal have at least 1'' free travel?

(quoted from post at 15:52:24 09/17/18)
When you state "high range" are you referring to the hyd hi-lo or manual range in trans? Yes traction could be slipping. Does foot clutch pedal have at least 1'' free travel?

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I am referencing the left shifter on the floor. Forward being low. Pulled toward the seat would be high range I believe. I will verify there is at lease an inch of tree travel. The linkage is in the middle of the slot and the order has to be pressed all the way forward to get the shifter to go into 1-4 gears without a grind. I will double check the free travel tonight

(quoted from post at 15:52:24 09/17/18)
When you state "high range" are you referring to the hyd hi-lo or manual range in trans? Yes traction could be slipping. Does foot clutch pedal have at least 1'' free travel?

Click to expand...

The shifter is marked II of 2. The pedel has more than an inch of travel before it engages the clutch or causes a slip I forward motion when depressed

Sounds like it could be the traction clutch. If you are driving in low range and
depress the brakes with force, does it stop? Not too big of a job to replace, but
you will need to split the tractor. Turn the flywheel and replace the pilot and
release bearing while you have it apart. If it is the hi lo clutch, I better let
someone else answer.
Ben

Ditto on traction clutch slipping.

(quoted from post at 20:52:19 09/17/18) Sounds like it could be the traction clutch. If you are driving in low range and
depress the brakes with force, does it stop? Not too big of a job to replace, but
you will need to split the tractor. Turn the flywheel and replace the pilot and
release bearing while you have it apart. If it is the hi lo clutch, I better let
someone else answer.
Ben

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I’ll give it a try this evening. I’ll make a guess the RPM’s should be up in a normal range for driving speed and press the brakes firmly. Should stall the engine or engine should continue to pull through the braking activity. If the brakes stop the tractor and the engine keep running the clutch is slipping. My belief is if all was working well the engine would overcome he brakes or brakes stall the engine.

(quoted from post at 06:42:56 09/18/18)
Ditto on traction clutch slipping.

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So I gave it a run this evening. 2100 rpm in 3rd gear 1st range or low. Stepped on the brake hard and it pulled the tractor down to almost a stop with the engine dropping about to a stall. Ran the same test in second range 3rd gear and 2100 rpms. Tractor slowed quickly engine was pulled down about 1000 rpms but did not show any signs of stalling. I think it’s slipping in the second range much more than in the first range.

That's normal to slip easier in a higher gear. If the clutch is slipping, it is
more apparent in the higher gears. Can you stop the tractor completely by braking
and not stall the engine in a higher gear? If so, then the clutch is slipping.
Ben

(quoted from post at 22:12:35 09/18/18) That's normal to slip easier in a higher gear. If the clutch is slipping, it is
more apparent in the higher gears. Can you stop the tractor completely by braking
and not stall the engine in a higher gear? If so, then the clutch is slipping.
Ben

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Yes, I could have stopped the tractor with the engine still pulling against the brakes. I figured it was unnecessary to completely stop as it was evedent it would have continued. Figured why trash the clutch any further at that point