4020 trans

Kory1998 · Nov 27, 2018

Is their any reason on why I need to pull the lower drive shaft on my 4020 synchro is I?m going to rebuild top shaft
Or what all does the bottom shaft consist of besides main drive gears and shift fork collars, what all need to be checked because I know you can?t by new gears anymore.

SVcummins · Nov 27, 2018

Just looked up several gears on jdparts all still available .

David G · Nov 27, 2018

I would definitely check bushings bearings and syncros if there.

Kory1998 · Nov 27, 2018

Price wise is the problem

Is their anyway that the lower shaft can go south.
Besides wear and tear.

Cliff Nelson · Nov 27, 2018

If bottom shaft shifting is not giving trouble and collars/gears look good there is no reason to go that deep. Bottom shaft service requires removing wheels, axles, and differential first.

SVcummins · Nov 27, 2018

Do you have the service manual ?

tomstractorsandtoys · Nov 28, 2018

Why are you working on the top shaft? If you are having problems in high and or reverse you are on the right track but if you are missing a range (1st,3rd and reverse or 2nd,5th and R ect)you have bottom shaft issues. Linkage is very important and is a good place to start before trans work. I also update the pointers in the side of the trans case with a ball and retainer setup that was used starting with the later 30 series tractors. Get a Deere service manual and take your time you can do it. Tom

Al Baker(pumpman) · Nov 28, 2018

The bottom shaft on this tranny isn't something for a beginner. If you tackle it make sure to have a good JD manual. Al

4020 trans

Kory1998

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SVcummins

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David G

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Kory1998

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Cliff Nelson

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SVcummins

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tomstractorsandtoys

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Al Baker(pumpman)

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