Easy
15-30 minutes
This item has been OEM sourced an is intended to be used with walk-behind lawnmowers from Toro and Lawn Boy. The metal pinion gear attaches the mower\\\'s transaxle and is used to interconnect with the wheel\\\'s gear to rotate the drive wheel. This item is available as an individual replacement part.
Gear-pinion, 15t 131-5399
OEM part for: Toro
Part Number: 131-5399
$4.99
In Stock
Ships within 1 business day 
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Compatibility
This Gear-pinion, 15t will fit the following 273 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Lawn Mower Parts
This part replaces obsolete part #: 131-0875, 110-9417
Customer Part Reviews ?
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Part worked as described
Easy to install. These allowed me to switch to wheels with metal teeth instead of flimsy plastic to propel the mower.
Guest -
July 16, 2021
Verified Purchase
good parts
very happy with this gear,
Guest -
May 25, 2020
Verified Purchase
Good replacement
Fast delivery. good product
Guest -
September 30, 2019
Verified Purchase
Worked as expected
Got my parts quickly and hot them replaced..mower runs like a new one!
Guest -
June 17, 2019
Verified Purchase
Great Service
Great service, parts fit beautifully. Thank-you
William -
May 4, 2019
Verified Purchase
Who is easy to fine and works good
The gear was just right right one that I needed. Thanks
Guest -
May 1, 2019
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Pinion gears and rear wheel gears teeth worn out
GLENN - May 31, 2017
👍 3 of 4 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Snap ring plires
Remove the rear wheels by unscrewing the bolts holding them on
Remove the retaining rings from the shaft and remove the worn gears
Install the new gears on the shaft, install the retaining rings
Install the new wheel on the shaft and tighten up the bolts to hold the wheels on
Remove the retaining rings from the shaft and remove the worn gears
Install the new gears on the shaft, install the retaining rings
Install the new wheel on the shaft and tighten up the bolts to hold the wheels on
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Snap rings were broken, cogs inside rear wheels worn, and knobs on wheel adjustment were broken
Charles - July 30, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set
Removed the rear wheels, cleaned area, filed out snap ring grove, installed pinion gears, installed snap rings, and installed wheel. Installed two new nuts in frame to hold rear cover with the screws. All a simple process. You shipped the correct parts on a timely basis. Back cutting grass.
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Gears were stripped
Michael - June 29, 2022
Tool Type
Lawn Mower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Parts Used
Pulled both rear wheels. Replaced the pinion gear, reinstalled both rear wheels, but in doing so you have tut o make sure all parts are realigned properly
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self propelled not working, right rear wheel drive gear broke and pinion gear
richard - August 27, 2021
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, snap ring pliers
replace pinion gear and rear wheel gear with new parts from ereplacementparts
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Drive gears worn and damaging the driven gears.
John - July 15, 2021
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
, Gear puller, C clip pliers
Parts Used
I replaced both gears. One was seized and I had to use a gear puller to remove the old gear. The other gear came off easily by just pulling with my hand. I cleaned both axels and the gears were easily installed. Do not over expand the clips that secure the gears. I broke one clip and had to go find a replacement. Slightly expand the clip and pull straight out. They are easy to remove. I used C clip pliers by the way.
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Lawn mower drive gears damaged from bent wheel support.
John - May 7, 2020
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Snap ring pliers
Parts Used
1. Remove 2 rear wheels.
2. Remove snap rings from each axle.
3. Remove damaged gears and install new ones.
4. Put snap rings back on.
5. Put wheels back on.
Note- the snap rings are small. The first one I took off flew away and it took me 10 minutes to find it. Otherwise this would be a 15-30 minute job.
2. Remove snap rings from each axle.
3. Remove damaged gears and install new ones.
4. Put snap rings back on.
5. Put wheels back on.
Note- the snap rings are small. The first one I took off flew away and it took me 10 minutes to find it. Otherwise this would be a 15-30 minute job.
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Rear wheels workout
JOHN - August 11, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Nutdriver
Replacing worn parts
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Left rear wheel wouldn't drive
William - May 5, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Snap ring pliers
Parts Used
Took wheel off, removed snap ring, installed new gear, installed snap ring, installed wheel, started lawnmower and mowed part of my acreage.....5 acres..,
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The gear teeth on the pinion gear chipped and wore out after 24 cuttings.
Carol - August 17, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set
Parts Used
1. Took the wheel off.
2. Removed the o-ring.
3. Put the new pinion gear on.
4. Reattached the o-ring.
5. Reattached the wheel.
2. Removed the o-ring.
3. Put the new pinion gear on.
4. Reattached the o-ring.
5. Reattached the wheel.
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Drive gears where stripped/ worn down on both sides.
Scott - June 29, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Snap ring pliers
Parts Used
1. Took the rear wheels off, one side at a time.
2. Removed the snap ring and the old pinion gear.
3. Installed the new gear with a little spray of white lithium grease for extra security.
4. Put the wheel back on to finish the job.
2. Removed the snap ring and the old pinion gear.
3. Installed the new gear with a little spray of white lithium grease for extra security.
4. Put the wheel back on to finish the job.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
