slipping

molines2k8 said:
agree that the u=joint would easy to see..how about the shaft going in to the bumper and out to hub...is there a spline in there that could be stripped, catching just enough to try to move?
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There is a ujoint under that cover and out from that, towards the tire is a splined shaft. It fits into the splined hub.and then there are threads for the castle nut at the end of it. This is the nut that folks are concerned about and that needs to be tightened correctly and have a cotter pin through the castle of the nut. This will hold the nut and keep it from coming loose . ( there is a hole in the end of the shaft for the cotter pin to fit thru). You can see some pictures of these shafts in the most recent posts of mine in the ujoints needed again thread here.http://www.nettractortalk.com/forums/showthread.php?t=13788&highlight=ujoints+needed
I will also mention there is also a threaded shaft on what we call the inner ujoint. It goes into the transmission and is hidden from view behind that plate with 3 bolts there on the side of the transmission.
Did you buy this machine new? or used? If the right fluids were used since new, I would be surprised if the inner plates were worn out in the transmission with that few hours. I will not use anything but Sudt2 in mine, and I am a huge cheapscate (wear socks out etc)..The sudt2 has antifoaming additives and I won't complain about the price. Did you notice any metal on the magnetic plug when you changed the fluid? about 2 1/2 gallons to fill it up.
I am going to send you a pm . bordercollie
 
i have examined a limited slip differential now and can say that even if the clutch plates are worn out and non functioning the diff will still operate as a normal non limited differential. soooo my vote goes to the stripped spline theory. you could always chain it to a tree or something big and lightly pull until it slips while watching the axle shafts to see which one is turning under load. you could even do this by yourself by lifting the bed and watching the half shafts from the cab.
 
Yea. Authuritis, that would tell the tale.
I think he also said he felt a wobble?... When turning the tires by hand, with it jacked up, did you feel any wobble when you wiggled the tires not backward and frontward , but when pushing and pulling toward you and the engine? or were they snug?. Just a thought but that is how I check tightness , bearings etc..
 
molines2k8 said:
the transmission in my rtv 900 started slipping in 2wd F/R. In 4wd it seems to work fine...oil/filters recently changed 1250hrs...any ideas?
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In 4wd it seems to work fine...
That statement says to me that it's not the brakes or low pressure. Check the rear, where the axle comes through the hub. If it will run in 2wd with the differential lock engaged, then there's just one side of the axle slipping in the hub.
 
Finally had time to check it out real good. The axles are tight, u-joints are tight. With both wheel off I give it throttle and see what is happening. It seems like there is a brake hung up inside the tranny. From what I can see one of the brake pistons move only a bit. I tapped on the linkage some but didn't seem to loosen anything up. It rolled alright in neutral it seems.
 
something just doesn't make sense to me. you say in an earlier post that when jacked up you turn the RR wheel and the LR wheel turns opposite. this is normal.>> then when you chalk one wheel and turn the other you can turn it with some force. this isn't normal. I still believe you have a stripped spline somewhere because if it was a pressure problem putting it in 4WD would make the problem worse not better.
 
Yes it's a strange one. I apply the e-brake and rev er up and it struggles to turn, as you would expect it would. But it's get enough torque to turn w/brake on. Let me give you some info....We have a 125gal. tank we fill with water to keep some new trees going, in the bed. I instructed the guy driving it to just creep along while it's that full. anyway I don't know if he rev it up suddenly or stopped suddenly - this one will put you through the window - almost. also I wonder if the shifter got stuck and he pried too hard on it. I told him about the pull knob to release it. Maybe the shifting forks are bent/broken so it's not releasing the brake and partly in gear??? I'm just grabbing for some possibilities....
 
The manual does mention the shifting fork or spring ,being damaged- as a possibility.If all else, you may need to check the pressure relief valve.

edit: I just some something in the manual.... what about the speed control cable on the "gas" pedal?? How does the pedal feel? Maybe it needs adjusting??
 
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It wouldn't hurt to clean the spark arrestor while we are eliminating things.They do effect power.
Moline, the manual was what my pm was about. Downloading will be faster though.
 
Yes I was going to get to that arrestor too. I did get a service manual so I will peruse it here in a bit. Thanks to you guys with your suggestions. It really helps.
I'm going to check the check and High relief valve for pressure. It seems like something inside the tranny is dragging. If a spline was stripped it would seem like it would turn roughly and intermittently. That fact that I can turn left side with effort while right tire chalked would that slip be in the limited slip diff letting that happen or should it not turn at all. If so it would likely be a spline inside. Gotta check the magnet...Thanks fellas
 
The differential is either open or locked when the pedal is held down with your left foot, it's not a limited slip. I don't see how the spark arrestor could affect the machine in the way you describe, it would be the same if in 2wd or 4wd.
 
if you hold one tire from turning and can turn the other tire you either have a striped spline somewhere or a broken differential. if the diff was broken i don't think it would drive in 2wd at all. on my 2008 1100 before i installed a coast valve and you let out on the throttle the machine would come to an abrupt halt and dang near put you through the windshield. this put an extreme amount of stress on the rear axles,U joints ,splines and differential. both of my rear axles had been replaced by 700 hours. just too much shock load. and with a heavy load would be more than enough to pop an axle spline.
 
Then it must be a spline?? If the left wheel will turn, with effort, when the right wheel is chocked, is there something loose somewhere between the left hub and the bevel gear. The arrestor was a heads up to clean it while I'm there. It doesn't have that kind of loss of power in 2wd. Brake hung up ??? I need to talk to the driver and see just what happened when it started acting like this. I was in it earlier in the day with no symptoms
 
Ya that's what this one does too, stops abruptly, I have to hold on to my dog when I slow down. I was thinking the same...if he had all that water -125ga. - and he made some sort of quick move. But he had better not have gone that fast with the weight to do damage....one would hope. I told him to creep....so I need to talk with him and see what was happening.
 
I was afraid that i would pop a U joint or twist an axle so i installed a coast valve and now it doesn't do that any more. I love it and i am sure it will make my U joints last longer.
 
Actually if you can turn one wheel and hold the other still it either means a bad differential or the input shaft to the differential is turning. Since we cannot see the input to the differential or the output from the tranny it is only a guess? I do not know how much of the tranny output will turn with the input to the diff. If you have it in 4WD does the shaft to the front try to turn when you hold one rear and turn the other? I do not know how the 4WD is attached to the tranny output/Diff. input, is there pictures in the manual?
Bryce
 
shinnery said:
Actually if you can turn one wheel and hold the other still it either means a bad differential or the input shaft to the differential is turning. Since we cannot see the input to the differential or the output from the tranny it is only a guess? I do not know how much of the tranny output will turn with the input to the diff. If you have it in 4WD does the shaft to the front try to turn when you hold one rear and turn the other? I do not know how the 4WD is attached to the tranny output/Diff. input, is there pictures in the manual?
Bryce
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Yes you are absolutly correct!!! sorry i missed that one and it was wrong of me to assume that the machine would be in gear when conducting this test. i don't know just how the front wheel output shaft is connected in side the transmission but what would it be like if the machine was jacked up in gear with the 4wd engages and the front wheels on the ground.
 
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