1175 transmission

My neighbor has a 1175 that is stuck in 4th gear. Can anyone
give me a idea where to start looking for the issue?

Remove the pins connecting the shifting rods to the transmission. If you can move the shift lever after doing so then the problem is in the trans. Trans cover removal would need to be done in order to check the shift assembly. And of course if you still can not shift it after the pins are removed the problem is in the console linkage, Rod.

Does the transmission lever in the cab move out of 4th gear but leave the transmission in 4th?

The shift lever will not move in the cab when hooked up. The linkage is free it is something in the trans itself. I didn't know if there was A common issue in the trans to look for.

See included pictures. If the problem is internal, it is likely that
1. The 3rd- 4th cluster gear is not sliding on its spline or
2. the 3rd-4th fork is not sliding on its shaft. Might be a jammed detent.

Maybe it is a lube problem. I would start by making sure the transmission is full of oil so that a generous amount of oil gets slung up and onto the shafts and splines. I find those sight guages on my 1170 can look deceptive. They screw in having a pipe thread and a hex drive. I would remove the lower sight guage and make sure the oil is up at least up to the bottom sight guage hole on level ground.

If the 3rd-4th cluster gears slidable spline is jammed, reversing the torque direction on this loose-fit spline might free it up. With no drawbar load, driving forward across a sizeable grader ditch will cause a momentary torque reversal and might cause a very tiny rotational movement within the spline. I would repeat this process a few times and see if it will shift out of 4th after each trip across the ditch.


PS After close inspection of the picture showing the levers and studying their descriptions, there seems to be a mistake so my 3rd-4th labels are partly wrong. Outer lever 30, showing the small spline, should drive inner lever 27 showing the small spline and not drive 24 showing the bigger spline. Clear a mud---LOL

Other things one could check without opening the transmission include---

Using the hands, try to rotate the outer levers in both directions. Is there backlash? How much backlash? Referring to the previous pictures, where might the backlash be coming from? Is there noise? How much noise? Where might the noise be coming from?


If hand torque on the outer levers does not yield any possible clues, stick the pin or a nail into the lever hole and clamp a pair of vise grips onto the lever plate and resting against the nail. Use this to increase the torque going into the transmission shift mechanism. Is it still tight and refuse to move?


If there is backlash, using the vise grips bang the backlash and listen for internal noise. The internal lever has some clearance within the yoke slot and might make a slight sound if you bang it. The internal lever might be jammed within its slot because of wear etc. and not make a noise.


Reposition the vise grips and repeat the process in the other direction.


Wear in the shaft bushings should not bind up the movements but might make a noise. Outer bushing wear might be seen in the process.


Fork wear should not bind up the movement unless it allows the internal lever to get bound up within its slot in the yoke.

I have had a couple that the detent sleeve retaining roll pin sheared allowing the sleeve to get out of place locking the shifter forks. Top cover has to come off obviously but at least it is not a power shift with all their plumbing to contend with.

Thank you for the information. I will be checking out everything you have said this week after I get the pressure washer after it for a minute.