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Transmission 121-9178

Part Number: 121-9178

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Questions & Answers

Repair Instructions

*This part replaces obsolete part #: 115-4652.

Product Information

Specifications

Shaft is Approx. 20.5" Long

Warning: California's Proposition 65

Frequently Purchased With

Lawn Mower Dri..
$27.40

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$4.99

Retainer-bushi..
$14.97

Bushing-sleeve..
$3.99

Mulching Blade..
$24.90

Baffle-rear
$16.97

Compatibility

This part is compatible with the following machines:

Toro

Expand the 111 compatible machines

Products Compatibility

This item works with the following types of products:

• Lawn Mower

Questions & Answers for Transmission

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Repair Instructions: Submitted by Customers Like You

8 of 9 people found this instruction helpful

Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Lawn Mower Drive Belt - 115-4669

Repair Difficulty:

Medium

Time Spent Repairing:

1-2 hours

Tools Used:

Screwdriver, Socket set, Wrench Set, Spring clip pliers

Transmission stopped pulling on my Toro personal pace walk behind mower

Found easy to follow repair instructions on U Tube. followed the step by step instructions. Very easy, just took me a little extra time than the experts seeing how I don't do this kind of repairs every day. Replacement parts from Ereplacement parts .com came very quickly and I will certainly use them again.

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4 of 4 people found this instruction helpful

Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Lawn Mower Drive Belt - 115-4669

Repair Difficulty:

Medium

Time Spent Repairing:

1-2 hours

Tools Used:

Pliers, Socket set, Wrench Set, grease gun

The lawn mower was no longer self propelled

1. Figured out how to take the drive transmission out.
a. Removed the handle, plastic and metal shrouds underneath,
b. Removed the drive wheels and metal side plates holding the transmission.
c. Loosened the belt guide at the engine.
d. Removed the drive belt.
e. Removed the transmission from the side plates. Detach from the control cable.
2. Install the new drive belt around the engine pulley, Tighten the belt guide.
3. Do the reverse of the dis-assembly. Grease all rotating parts
4. Start lawn mower and check operation.

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3 of 4 people found this instruction helpful

Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Repair Difficulty:

Medium

Time Spent Repairing:

1-2 hours

Tools Used:

Screwdriver, Socket set, Wrench Set, Nutdriver, Adjustable Wrench, Square Head Socket, Snap Ring Pliers

Lawn Mower would not self propel

Removed the blade, removed belt cover and pulleys. Removed both belts. Removed rear wheels and the right side axle holder, slid transmission out. Replaced transmission and re-assembled.

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1 of 1 people found this instruction helpful

Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Repair Difficulty:

Medium

Time Spent Repairing:

30-60 minutes

Tools Used:

Socket set, Nutdriver

Lost self propelled

Followed excellent video on YouTube.
Removed blade
Removed belt covers
Removed belt
Removed axle pins
Slid out axle/transmission assembly and replaced it

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1 of 1 people found this instruction helpful

Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Repair Difficulty:

Medium

Time Spent Repairing:

30-60 minutes

Tools Used:

Pliers, Socket set, Wrench Set, Nutdriver, Adjustable Wrench

Mower needed a new transmission

I had watched the video on You tube to see the repair actually in action. This helped in the process of the repair

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1 of 1 people found this instruction helpful

Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Repair Difficulty:

Easy

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Pliers, Socket set, Wrench Set

Transmission failed

1. Look up on U-Tube how to replace unit followed most of the direction not all of them.
2. After disassembly found that the bushing and bearings on for the axle were bad.
3. When replacing transmission also get the bushing and bearings for the axle
4. Pick up at local shop and replaced both sides
5. The actual work time was about on hour.

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Tool Type:

Lawn Mower

Parts Used:

Ball Bearing - 104-8699

Transmission - 121-9178

Repair Difficulty:

Medium

Time Spent Repairing:

1-2 hours

Tools Used:

Screwdriver, Socket set, snap ring pliers, putty knife or scraper

Rear-wheel drive wheel would spin when making a turn (transmission). Rear wheel squeak (bearing).

1. Remove rear wheels.
2. Remove drive belt covers.
3. Remove one rear wheel support bracket.
4. Remove transmission.
5. Remove bearing from each rear wheel support bracket.
6. Re-assemble in reverse directions.

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Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Lawn Mower Drive Belt - 115-4669

Repair Difficulty:

Easy

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Pliers, Socket set, Wrench Set, Snap Ring pliers.

Self propel would not engage.

Followed instructions on the video.

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Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Lawn Mower Drive Belt - 115-4669

Repair Difficulty:

Easy

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Pliers, Socket set, Adjustable Wrench, snap ring pliers

Transmission grinding

Disassembled the parts connecting to the transmission taking note where everything went. Removed the transmission and put the new one in. Reassembled the parts connecting tothe transmission. Works like a charm.

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Tool Type:

Lawn Mower

Parts Used:

Transmission - 121-9178

Repair Difficulty:

Easy

Time Spent Repairing:

1-2 hours

Tools Used:

Socket set, snap ring pliers, Square drive screw bit

Transmission pulley wore out

Followed Youtube instructions from ereplacement parts.

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Reviews

Average Rating (out of 5):

5 Reviews

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Excellent service n quick response!!!

Guest - August 31, 2021 Verified Purchase

Quick repair

This was the fastest repair ever,easy website to navigate and quick delivery. Price was good including shipping. I will definitely use them again. Check them out your self. Butch from East Have,Ct.

Andrew - May 9, 2020 Verified Purchase

Git er done

The right part, the right price, the right fast delivery, I'd say it was all right!

Guest - April 15, 2020 Verified Purchase

the part installed without difficult even though there were slight differences in the way the belt pulley was attached to the diffferential.

My mower is working fine again now. thanks!

Guest - June 27, 2019 Verified Purchase

Arrived on time and installed easily.

Arrived the shipment within the time promised. Installation was very easy and the lawn mower now works very well. No need to push really hard anymore.

Guest - November 17, 2020 Verified Purchase

Verified Purchase

eReplacementParts Team

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