How to Replace John Deere Transmission 

I have had to teach the vocational students for many many years so I guess I’m getting good at explaining how to videos so everyone with a little mechanical or not much mechanical aptitude can perform most videos that I put out to all of the DIYers. Thank you for watching and the kind comment! Please share my channel to help it grow. It would be greatly appreciated.

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You might keep the old one if plastic trans, wash under the clutch pulley really really good or remove it and clean Fixed

What was going on with your D140 when you did this or bought this new unit? All of a sudden this spring my D140 has a lot less power than last summer. It bogs down on slight slopes and if I get into some thick grass or higher grass. I don't know if it is an engine problem or what. I been thinking I am running on only one cylinder maybe instead of two but I also noticed my drive belt has some pretty good cracks/cuts in it.....but it still turns the blades.

@@JQUICK21 It wouldn’t pull hills anymore. Literally as soon as I hit the incline it would just stop. This slowly happened over the course of a year until it just stopped one day. Never had a problem on a flat or tall grass. I had about 150 hours on my D140. After I swapped it out it was like the day I bought it.

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I’m glad it was helpful and thank you for the kind comment. Let me know if you may have a video you want to see. If I get a S120 in for service and or a repair I will try and get a video on it if I can.

@@JohnsonsSmallEngines yes Sir.

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Thank you!

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Thanks for watching my videos and commenting. Most John Deere D, E, L and I will assume the S series are very close to this video.

What was the reason for the belt replacement? My D140 belt still turns the blades but I noticed it had some pretty good cracks or cuts in it in many places when I was under there replacing the PTO clutch. My tractor this spring has a whole lot less power and I don't know if it is the engine or what? I was thinking maybe I am running on just one cylinder instead of two but not sure if that can be my problem.

@@JQUICK21 The transmission belt was hanging on by a thread. Didn't have any loss of performance, but when I was under there for something else (don't remember) I noticed there was about an inch section of the belt that had a huge chunk missing.

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I'm glad it was helpful and thank you for the kind comment!

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@@JohnsonsSmallEngines your welcome young man 👍😎

My opinion, the John Deere Sabre and STX series was the start of there cheaper line and I agree, both were not fun to work on.

@JohnsonsSmallEngines yeah I got to tell you, very interesting tho I like challenges 😅but what I found out, to Change even a drive belt you have to take a lot of parts off even steering rod, just to Change the belt, and yes you're 100% right, check everything while you got this thing apart cuz you'll be doing it again to Change pulleys, it's almost with this thing like, one thing after another 🤣, well thanks again for the video, when I changed my idler pulley yesterday I figured out I'll look at other things, and found out my transmission pulley is crooked too, all tho I'm thinking about just cutting out battery plate to get access to it instead of dropping transmission, I got to make this deere easier to work on, vs of what the engineers anticipated us to do 😉, but over all like I said I like challenges so as aggravating as this machine sometimes is, I'm laughing to my friends about it. My one friend calls me after the weekend now and says, how the deere going🤣🤣🤣cuz he knows another thing had to brake on it😅😅😅well John it would be great if I could ask you some questions when I'll run in to any more deere mysteries , have a great day and thank you for the video again, if ill have time I'm thinking maybe I'll drop my transmission with my son just to teach him the right procedure, and than after words cut out that plate to show him that sometimes you can bend some rules of engineering, he's 13 and I like to show him also, that not always going by the book is the best. He's already working on his Mazda Miata and learned a lot of things

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I’m glad it was helpful and thank you for the kind comment.

Thanks! and thank you for watching and commenting.

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Thanks!

Thank you! Thank you for watching and the kind comment!

Quick question! Jd la125. Transmission leak, fluid puddle on floor, shaft seals both sides are good! Where else could it be leaking? Thanks!!

⁠ I would suggest putting a fresh piece of cardboard underneath the transmission area and see what happens overnight. Then look straight up and see where it’s dripping from. It could be the brake shaft coming out of the side of the transmission. Or the main drive pulley shaft. You can also look for the transmission breakdown if you can find the model number of your transmission or possibly go to the John Deere website and look up the transmission to see where all the seals are located. you also may need to clean the transmission to correctly find out where it is leaking from.

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Hi Mark, The flashlight is a 800 Lumen LED Rechargeable Magnetic Folding Slim Bar Work Light from harbor freight. Its new and a little pricy but it has a great magnet, rechargeable, and bright.

Hi Dave, make sure your running the engine at full speed. The transmission will make make grunting “groaning “ feel / noise if your running the engine at a low speed. Also check the owners manual to see if you can change the oil on yours. Some of the better tractors you can but it depends on what model transmission you have. I will be picking up a x300 series for service soon and I will check it out.

@@JohnsonsSmallEngines Hi Brad. I always make sure the engine is at full revs before I engage the blades. I try not to lug it when just motoring about but it does groan a little when setting off or going up hill......don't know if that's a bad sign? I've checked the owners manual and it doesn't look like you can change the oil. The starter motor is sticking too but a squirt with some brake and clutch cleaner frees it up. Have you done a vlog on changing the deck belt on an edge mulching deck......that would be informative. Apologies, I've just thrown a lot at you there!! Dave

You’ll just need to go with the way the transmission is until it doesn’t go. I’ve had machines in and through normal wear and tear start to sound different but not much you can do. Do you have big hills? or tow heavy? Those two can play a role in the transmission failing. How many hours are on the machine? What size mower deck? I’ll check to see if I have a video. I’m not on my computer so I will check tomorrow.

@@JohnsonsSmallEngines No, not many hills and try not to tow so it has an easy life really.......just 2.5 hours weekly grass cutting during the season. I only cut dry grass too. It has about 550 total hours on it right now but I service it annually religeously. It has the 42" edge mulching deck. Many thanks for your help bruv! Best Dave

Got on my computer. This is what I have. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-jHjzpUZy4EY.html

A little under 400. The property had extreme hills.

Hi William, thank you for watching, supporting my channel and the kind comment :)

I do not have a video on changing the transmission fluid on a John Deere LT150 but I do have this one on installing a new transmission belt. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-arQHhTc1dBA.html. It will at least let you see what the transmission looks like. Most all transmission replacements will be similar but not the same.

Thank you. It depends on where you get the transmission roughly $700.00 to $950.00 just for a new one (Not rebuilt). For this model.

Do the best you can. That’s all you can do!

There is normally more to do than just and upgrade, there are different axle sizes meaning different rims needed and more work then a easier refit. For me to charge for the more expensive transmission and all the work needed, the price would have been 3/4 to cost of a new machine. Good looking out tho!! Thanks for watching commenting and supporting my channel.

@@JohnsonsSmallEngines I'm a little surprised, the Owner opted for what they did. The cost of a Transmission isn't cheap. These are pretty much throw away machines after about 5 Years. I wouldn't even consider purchasing a Machine with the Plastic Transmission.

The transmission is not plastic.

@@JohnsonsSmallEngines I know, I was speaking about the ones that are.

The bolt is self tapping, no need to take the time, "saving time, saves the customer $" just like the factory does on the assemble line, plus there is no stress at all on the bolt, it is just there to help keep the belt from falling off when the clutch/brake is applied. Thanks for watching and commenting.

Yes

Ty so much for the quick reply & happy holidays.@@JohnsonsSmallEngines

You are looking for the plug that connects to the brake safety switch that is attaches to the transmission, located on the wiring harness. Here is a diagram of the D100 harness from the John Deere web site. partscatalog.deere.com/jdrc/sidebyside/equipment/76302/referrer/search/pgId/2730318

Thanks man like all your drive keep uo the good work@@JohnsonsSmallEngines

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@@JohnsonsSmallEngines Thank you so much, a great instructional video!

Yes, If one comes in.

It is a sealed unit and a new transmission comes with oil in it. There is not really a “fill” hole. Some will use the vent or other rubber cover on the transmission. Must be very careful not to break the to vent plug.