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c transmisson question

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=126309
Printed Date: 11 Oct 2025 at 2:22am
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Topic: c transmisson question

Posted By: Richmar
Subject: c transmisson question
Date Posted: 25 Jul 2016 at 9:12am

I have a C tractor that will not stay in third. What do you think I need to look for to correct this problem? I need to hold the shift lever to keep it in gear. Any help would appreciated.

Thank You

Richmar

Replies:

Posted By: Bonny Lad Farms
Date Posted: 25 Jul 2016 at 9:28am

To the best of my knowledge that situation always indicates a worn out gear.
There is no physical adjustment on the selector, internally or externally. Usually this indicates that there is just plain old wear on the gear to where there isn't a sufficient amount of surface to engage with and hold.
What should look like a relatively squared front on the gear will look like very rounded.
Hope that helps. Steve

Posted By: Richmar
Date Posted: 25 Jul 2016 at 9:30am

Steve:

Thank You!

Rich

Posted By: Bonny Lad Farms
Date Posted: 25 Jul 2016 at 9:32am

No problem.

Posted By: Bill Long
Date Posted: 25 Jul 2016 at 6:56pm

You also may want to look at the gear shifter rails. We found that there was very little problem with them when we sold them but after all this time the detent spring may be broken or the shifting rails worn.

Move the shift lever around and see if when you place it in gear that you have a solid feel.

If not drain the oil from the transmission and remove the shifter place located on the left hand side of the transmission. Check the high shifter rail to see if has a solid move into place. If not then remove it. Be careful cause the detent balls can fly out. May be a detent spring or a damaged rail.

We had to do this a lot with the WC shifter but not much the B-C shifter.

Let me know by private mail on this site and I may be able to give you more detailed information.

Good Luck!

Bill Long

Posted By: Bill Long
Date Posted: 25 Jul 2016 at 6:56pm