Farm Equipment - D-14, D-15 1 & 2 granny's?

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D-14, D-15 1 & 2 granny's?

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=208639
Printed Date: 23 Oct 2025 at 3:29pm
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Topic: D-14, D-15 1 & 2 granny's?

Posted By: only AC orange
Subject: D-14, D-15 1 & 2 granny's?
Date Posted: 23 Oct 2025 at 7:54am

Is there any difference between D-14, D-15 1, and D-15 2 internals in transmission (gears, shafts, bearings, seals, etc.)? What can be interchanged is the question. Thanks

Replies:

Posted By: DrAllis
Date Posted: 23 Oct 2025 at 9:34am

Many part numbers have changed back in the day. The D-15 tractor at s/n 17565 had some changes that prior s/n's didn't have. It appears that if you had a D-14 complete tranny and a D-15 complete tranny, you could interchange a lot of parts just fine. Sometimes when they made a change to a specific gear, you had to change the other gear that mated with it. Gear tooth counts were different so they were in pairs. And who KNOWS what is in either tranny until you tear them down?? Someone may have already been in there before you. There used to be aftermarket 3rd gears available. AGCO wouldn't have much if anything after 60 years.