What transmission fluid for Allis 20-35?
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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=159531
Printed Date: 13 Apr 2026 at 12:36pm
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Topic: What transmission fluid for Allis 20-35?
Posted By: Jacob (WI,ND)
Subject: What transmission fluid for Allis 20-35?
Date Posted: 31 Mar 2019 at 8:50pm
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Hi all, I previously asked around and found out that the general consensus for engine oil for the 20-35 is either straight 30 weight, or 15w40 diesel engine oil. OK, now how about the transmission? I don't believe I have asked this one yet, and I wasn't coming up with anything by searching. What do you all run in your transmissions? Trying to get all these details figured out for start up this summer, thanks! ------------- Jacob Swanson 1920 6-12; 1925,1926 20-35 longfenders; 1925,1926 15-25's; 1927,1929 20-35 shortfenders; C; B's; IB; WC's; WD; WD45 |
Replies:
Posted By: Dave H (NE)
Date Posted: 31 Mar 2019 at 9:24pm
| Jacob. I use 140 trans oil in mine. Dave |
Posted By: Jacob (WI,ND)
Date Posted: 08 Apr 2019 at 10:10pm
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Thanks Dave, I keep meaning to call you to catch up. It's been a while. One of these days, I swear. Anyone else have a 20-35 with fluid in the tranny?  ------------- Jacob Swanson 1920 6-12; 1925,1926 20-35 longfenders; 1925,1926 15-25's; 1927,1929 20-35 shortfenders; C; B's; IB; WC's; WD; WD45 |
Posted By: SteveM C/IL
Date Posted: 09 Apr 2019 at 9:29pm
| I put 80-90 in my UC.The stuff that was in there musta been original.Resembled plastic roofing cement. Had to dig it out. |
Posted By: Darrell G (MN)
Date Posted: 10 Apr 2019 at 11:48am
| It was a substance called extra heckela, Mobil still makes it, I took 80-90 and poured in a pail and used a mixer on a drill and put gun grease in it and mixed to make it thicker, works great. 4-11-19 update. I found more info and Extra Hecela was 600 wt oil. I found records that I used 80/140 and added gun grease, 600 wt is quite thick, however it helps with remaining on the gears for lubrication. |
Posted By: allisrutledge
Date Posted: 10 Apr 2019 at 1:05pm
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Jacob, I looked for the barrel I used in my A but it is long gone I suppose. I'm 99 percent sure it was 140 wt also. ------------- Allis Chalmers still exist in my mind and barns |
Posted By: NEVER green
Date Posted: 11 Apr 2019 at 8:44am
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I am going to use 140 wt gear oil and a couple gallons of that thick Lucas. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: Jacob (WI,ND)
Date Posted: 13 Apr 2019 at 10:04pm
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Thanks for the advice, all other advice is welcome. I realize not nearly as many guys here are running these old ones as say WD's or whatever. For reference to others that may be seeking this info, this document says the transmission holds seven gallons of oil. Which sounds about right because I know we drained out over five gallons worth of sludge from mine and it was not full. Link, see page 18: http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1004&context=tractorpower" rel="nofollow - http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1004&context=tractorpower
------------- Jacob Swanson 1920 6-12; 1925,1926 20-35 longfenders; 1925,1926 15-25's; 1927,1929 20-35 shortfenders; C; B's; IB; WC's; WD; WD45 |
Posted By: Leesok
Date Posted: 13 Apr 2019 at 10:25pm
| 000 pourable grease in all pre 40 trannys and rear ends around here. |