eibbed 63 #1 Posted November 11, 2016 Gentlemen, Is a 551 transmission the exact same as a 702 transmission? My thanks to your reply in advance. Dave Share this post Link to post Share on other sites
Achto 27,823 #2 Posted November 11, 2016 2 hours ago, eibbed said: Is a 551 transmission the exact same as a 702 transmission? The 551 uses a 5010 transmission. The 702 uses a 5025 transmission. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,104 #3 Posted November 11, 2016 The 5010 was the 3-piece case trans last used in the 401 only in 1961 The 5007 was the first 2-piece case trans used in the 551 and 701 in 1961 Have never compared the parts but in 1962 at serial number 62-02856 there was a bend added to the shifter to clear the HY-2 hydraulic pump. That may be the only difference in the 5007 and 5025. The 5025 was replaced by the 5046 in 1964 because they no longer considered the shifter a part of the transmission. That may be the only difference in the 5025 and 5046. Garry 3 Share this post Link to post Share on other sites
Achto 27,823 #4 Posted November 11, 2016 Thanks for adding that info @gwest_ca. This is why collective knowledge is so much better. 1 Share this post Link to post Share on other sites
stevasaurus 22,882 #5 Posted November 11, 2016 Garry is correct. I have rebuilt both the 5007 and the 5025 and internally, they are the same. It looks like Wheel Horse changed to a different parts numbering system when you compare the 2 parts list...ie...the drain and vent plugs, but on both transmissions the side plug is 1/4" and the drain plug is 3/8". That is the only thing that I found to be different. If you have what you think is a #5007, you could look at the casting date on the trans case...if it is from 1960 or 1961 (and I only say 1960 because I would think they would already have these parts to use in 1961)...it would be a good bet that you do have the #5007 transmission. Just know that a casting date from 1961 may be used in the 1962 #5025...the case halves are the same part number in both transmissions. They would use left overs first. 1 Share this post Link to post Share on other sites
eibbed 63 #6 Posted December 16, 2016 (edited) Gentlemen, Thanks for all of the very informative comments. Unfortunately, since I posted my question, I decided to post my 551 transmission for sale in the Classified Section of our forum. Should it not sell, I now know for sure that I can keep it as a backup for my 702. Dave Edited December 16, 2016 by eibbed Share this post Link to post Share on other sites
