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Stripped splines on input shaft to hydro gear

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Can look up and buy parts here for hydro gear

Posted on Mar 06, 2009


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1 Answer

2001 polaris magnum 500 wheel drive will not work on ground but when front and rear are jacked up of the ground it works why is that?

If the engine is revving, but the bike is not moving forward on the ground, then something is stripped or sheared off. When you lift the engine, drive shaft splines extend and engage enough to rotate the wheels. Also, there is less resistance so the wheels may turn easier, even if a transmission gear is broken. I've stripped these splines (the female side) My first suggestion is to pull the splined rear drive shaft out and inspect all sides. I answered a previous question on how to remove them if you search on my answers.

Oct 23, 2014 | Polaris ATV

1 Answer

My left hand hydro transmission on my 2011 troybilt zero turn is slipping and making noise. Whats wrong?

possible stripped drive key or splines on the drive shaft / hub or faulty hydraulic motor in that side . Suggest a trip to an authorised service centre as it could be under warranty.

Sep 11, 2014 | Cars & Trucks

2 Answers

How do my half shafts connect to my hub

Is this a front wheel drive if so it has splines. Sounds like either you stripped the splines on the shaft or on the hub which is pretty hard to do. Considering it takes a puller to get it off and that nut with the cotter pin pretty much presses it on.

Jun 18, 2012 | 1996 Ford Taurus

1 Answer

Does not move when in neutral and the brake is off. push forward or reverse.

hi there pauly 46 here

make sure that the hydro box bypass lever is engaged ( that is pushed in)

check that the axle /shaft keys are in place ( or unit wont move )

make sure there is tension on the drive belt and the tensioner pulley is ok and belt has not jumped off and the transmission input pulley on top off the hydro box is turning.

then check that the splines on the trans input pulley are not stripped.

then check that the input shaft splines are not stripped as well.

make sure the hydro box has got the correct amount of oil

have look and see what you can find

cheers pauly46

Apr 24, 2011 | John Deere 22HP Hydrostatic 42" Riding...

1 Answer


are the wheel / axle keys in the shafts ? make sure they are in the shafts with the wheels

provided you have correct tension on drive belt and belt is good and pulleys are all good , and spline on top of gear box input shaft is good not stipped ( as well as the pulley spline )check splines on shaft and pulley carefully

you should have movement of the variable displacement pump in the trans if all is good here ?

sounds like you may have a stuck bypass actuator in the box or the oil level has got low
and needs refilling and bleeding of air

make sure the lever is actually moving the swash plate for the transmission

if trans has a stuck or broken bypass - trans will ned opening up
let your local dealer take a look gearbox job on hydro units are not exactly easy
to fix unless you know what you are doing night pay to let local dealer repair it for you !!!!!!


Jan 23, 2011 | Craftsman 20 Hp 42" Deck Lawn Tractor

1 Answer

I have a honda interstate 500 and first gear will slow you down but soon as you give it throtle it grinds

It sounds like you have a stripped spline collar on your rear wheel. The spline collar bolts on to the center of the rear wheel and slides over the spline shaft coming out of the final drive. If it is stripped the final drive will spin but the wheel wont.
You can also get a grinding sound if the u-joint in the final drive shaft has a bad bearing. The shaft and u-joint are only sold as an assembly and would probably have to be purchased used from a salvage operation.

Dec 28, 2010 | Honda FT 500 Motorcycles

1 Answer

I have a Sabre 1846 HV. The transmission began to make a loud squealing noise and won't pull the mower. How do I evaluate the problem? How do I remove the frame to get to the transmission?

Input shaft pulley splines are stripped.Input shaft is forged steel and the pulley is cast so 99% of the time only the pulley will need to be replaced.6 bolts,hydro lever,tow rod and brake rod needs to be removed.Our shop does about 1 Sabre every 2-3 months with this same condition.Takes less than 2 hours time to repair.

May 28, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Driving a 2003 Ford windstar. Went to pass and

Very common on this make and model trans, pump drive splines inside torque converter strip out and pump is not turning, Most times there is no damage to pump shaft. Remove trans and remove torque converter, inspect the splines at the very bottom of the hub hole. If stripped out inspected pump shaft splines which are the smaller center splines coming out of trans, if ok replace torque converter and re-install trans, change out fluid, clean any metal from magnet and replace filter, fill with fluid and verify proper operation.

Mar 01, 2010 | 2003 Ford Windstar

1 Answer

I have a 2000 Expedition 4.6L Triton. I've had truck about 7 years and love it. I have had all the transmission issues this truck can have...(I thought) until now this: SYMPTOM Transmission drives well in...

4R100 or 4R70W?

Power is transmitted from the torque converter to the geartrain components through the input shaft and forward clutch cylinder.
  • By holding or driving certain members of the gearset, four forward ratios and one reverse ratio are obtained and transmitted to the output shaft. The ratios are as follows:

GEAR RATIO 1ST 2.71 to 1 2ND 1.54 to 1 3RD 1.00 to 1 4TH 0.71 to 1 REVERSE 2.18 to 1
Input Shaft
The input shaft is supported by two bushings in the stator support. End positioning of the input shaft is controlled by the splines in the converter turbine and the overdrive planet assembly.
Output Shaft
The output shaft is supported by two bushings in the case and by the slip-yoke and bushing in the extension housing. End positioning is controlled by the parking pawl gear and snap ring or shoulder and by the reverse ring gear hub and snap ring.
Overdrive System
The overdrive planetary system consists of the overdrive planet assembly, overdrive sun gear, overdrive ring gear, coast clutch cylinder, overdrive one-way clutch assembly and the center shaft, as shown in the following illustration. The overdrive planet assembly is splined to the input shaft. The overdrive sun gear is centered by a bushing on the input shaft and held in place laterally by needle bearings on the reactor support and the overdrive planet assembly. The overdrive sun gear is splined to the coast clutch cylinder, which in turn is splined to the overdrive one-way clutch inner race.
The outer race of the one-way clutch is splined to the overdrive ring gear, which is splined to the center shaft. The center shaft is centered by the forward planetary assembly and is laterally held by needle bearings on the center support and the overdrive planet assembly. The center shaft is splined into the forward clutch cylinder.
Two friction clutches are assembled in the overdrive planet assembly. The coast clutch is splined between the coast clutch cylinder and the overdrive ring gear. The coast clutch is activated to perform engine braking in MANUAL 1, MANUAL 2 and third gear with the transmission control switch engaged.
The overdrive clutch is splined between the case and the coast clutch cylinder. The overdrive clutch holds the coast clutch cylinder and, in turn, the overdrive sun gear, to permit the planet assembly to overdrive the ring gear.
Forward Drive System
The forward drive system consists of the forward clutch cylinder, intermediate brake drum, intermediate one-way clutch, input shell, forward ring gear, forward ring gear hub, forward/reverse sun gear and the forward planetary carrier and forward planetary gears.
The forward clutch cylinder is splined on the center shaft. The forward ring gear is piloted on the forward ring gear hub. Thrust bearings on the forward planet assembly and forward clutch cylinder hold the forward ring gear hub in place.
The intermediate brake drum is radially supported by bushings on the center support and is laterally controlled by thrust washers on the forward clutch cylinder and center support. The intermediate brake drum has the inner race of the intermediate one-way clutch press-fitted on its pilot. The intermediate one-way clutch's outer race is splined to the intermediate friction clutch, which is splined to the case. The intermediate brake drum has lugs that are slotted into the input shell to form a mechanical connection. The input shell is splined into the forward/reverse sun gear. The forward/reverse sun gear is common to two planetary gearsets. The forward planet is splined to the output shaft and is laterally positioned by needle bearings on the sun gear and on the forward clutch cylinder, as shown in the following illustration.
Two friction clutch assemblies, the direct clutch and the forward clutch, are shown with the forward planetary assembly. The direct clutch assembly splines the forward clutch cylinder to the intermediate brake drum. The forward clutch assembly splines the forward clutch cylinder to the forward ring gear. The forward clutch is activated during all forward gears. While in third or fourth gear, both the direct and forward clutches are applied to hold the forward planetary assembly and enable it to act as a solid shaft.
In second gear, the intermediate clutch assembly holds the forward/reverse sun gears. It is applied, along with the intermediate one-way clutch, to hold the intermediate brake drum, input shell and forward/reverse sun gear. In higher gears, the one-way clutch overruns.
Low and Reverse Drive System
The reverse planetary assembly consists of the reverse planetary carrier, reverse planet gears, the reverse ring gear, the reverse ring gear hub, the reverse clutch hub and the low-reverse one-way clutch assembly.
The reverse ring gear hub is splined to the output shaft and to the reverse ring gear. The reverse ring gear hub is laterally held by a needle bearing on the inner race of the low-reverse one-way clutch and a snap ring on the output shaft. The reverse planet assembly is splined to the low-reverse clutch hub. The low-reverse clutch hub is connected by the reverse clutch to the case. The inner race of the one-way clutch is bolted to the case.
The reverse clutch assembly is activated in REVERSE gear and in MANUAL 1. The reverse clutch bypasses the reverse one-way clutch during coast and MANUAL 1. The reverse clutch holds the reverse planet assembly in REVERSE gear to enable the sun gear to drive the reverse ring gear in the opposite direction.
Apply Components
The following information describes the operation of the three 4R100 one-way clutches.
One-Way Clutch—Overdrive
The overdrive one-way clutch, shown in the following illustration, transmits engine torque from the overdrive sun gear to the overdrive ring gear in first, second and third gear range. The overdrive one-way clutch transmits power when the sprags are engaged between the inner and outer races. The inner race is splined to the coast clutch cylinder, which in turn is splined to the overdrive sun gear. The outer race is splined to the overdrive ring gear.
The overdrive one-way clutch engages whenever the overdrive planetary system attempts to drive the overdrive sun gear clockwise when the overdrive ring gear has a counterclockwise torque from the vehicle. When torqued counterclockwise, the overdrive one-way clutch engages and acts as a wedge to lock the sun gear and the ring gear together. During coast, the overdrive one-way clutch enables the ring gear to overrun or spin at a faster rate than the sun gear.
The overdrive one-way clutch overruns when in overdrive (fourth gear). In overdrive, the coast clutch cylinder is held by the overdrive one-way clutch, which in turn holds the overdrive sun gear. This causes the overdrive planet assembly to walk around the sun gear and overdrive the overdrive ring gear. The inner race of the overdrive one-way clutch is thus held stationary while the outer race is allowed to overrun clockwise.

Nov 10, 2009 | 2000 Ford Expedition

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