STX 38 transmission (manual)

T

tooler

Forum Newbie
My new to me tractor suddenly seized up so the belt starts to burn. I removed the deck and found that the pulley on the transmission moves back and forth. I assume the bearing is shot, is this a common occurrence and will I have to change all the bearings?
 
tooler said:
My new to me tractor suddenly seized up so the belt starts to burn. I removed the deck and found that the pulley on the transmission moves back and forth. I assume the bearing is shot, is this a common occurrence and will I have to change all the bearings?
Click to expand...
Hi tooler,

These had upper input shaft bushings in the trans housing that would seldom wear. You would need the number off the trans/differential housing to possibly locate any parts. Green Part Store may be able to help.

It was common for the pulley splines to wear out and strip, but the input shaft needs to also be replaced due to wear.

Otherwise, it sounds like it's time to possibly look for a used replacement transmission or another parts mower. Manual trans models are little harder to find in my area.

As I recall when I worked for the local JD dealer this model was the mower model that started the "black deck versus yellow deck" debate among owner's years ago. It was just a deck paint color difference. (Marketing Sales psychology at its best).

Yellow '89-'93.

Black '94-'97.

Both were very popular back then, but people often like to brag about which one is better.
 
Auto Doc's said:
Hi tooler,

These had upper input shaft bushings in the trans housing that would seldom wear. You would need the number off the trans/differential housing to possibly locate any parts. Green Part Store may be able to help.

It was common for the pulley splines to wear out and strip, but the input shaft needs to also be replaced due to wear.

Otherwise, it sounds like it's time to possibly look for a used replacement transmission or another parts mower. Manual trans models are little harder to find in my area.

As I recall when I worked for the local JD dealer this model was the mower model that started the "black deck versus yellow deck" debate among owner's years ago. It was just a deck paint color difference. (Marketing Sales psychology at its best).

Yellow '89-'93.

Black '94-'97.

Both were very popular back then, but people often like to brag about which one is better.
Click to expand...
Thanks, this is a yellow deck, important only when buying parts at John Deere AFAIK. I have two others and never had transmission trouble. This machine is in mint condition compared to those.
 
You need two SCE108 needle bearings. JD AM34141, Tecumseh 780086.
And the input shaft. Tecumseh 776332, JD M82843

The bearings is the easy part but it is the input that is hard to get if available.
 
tooler said:
Thanks, this is a yellow deck, important only when buying parts at John Deere AFAIK. I have two others and never had transmission trouble. This machine is in mint condition compared to those.
Click to expand...
Hi tooler:

Some of the older parts guys remember the yellow versus black deck debates, but it was mainly so they could identify the serial number breaks from early too late models. John Deere even used the trend in some of their later advertising publications at the time.

That has been a common practice with John Deere equipment for years. (Produce and inferior initial product, then quietly make minor design changes and introduce it as a "new" better product)

I also recall people swapping from "yellow" over to "black" decks because they had a higher resale value in the used markets.

I never worked in the parts department, but I'm sure there were some minor differences that made them "special".
 
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