190 2 pinion vs 190 4 pinion 200 rear end
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Topic: 190 2 pinion vs 190 4 pinion 200 rear end
Posted By: brad durst
Subject: 190 2 pinion vs 190 4 pinion 200 rear end
Date Posted: 27 Mar 2020 at 10:00am
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what 190's have a 4 pinion rear end? and will they inter change with a 2 pinion. i do know that you can not take a 4 pinion out of a 200 and put it in a early 190. so is the later 190xt series 3 use the same 4 pinion as the 200 or is it different
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Replies:
Posted By: DougG
Date Posted: 27 Mar 2020 at 6:16pm
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Pretty sure the XT 3 and 200 are the same , the 2 was in 67 and earlier models with the small axles,,
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Posted By: DrAllis
Date Posted: 27 Mar 2020 at 7:05pm
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Small 2 3/4" axles (prior to s/n 9001) were all 2-pinion from the factory and even after the driveline update kit. All other 190's and 190XT's from s/n 9001 up to 23000 were still 2-pinion differentials and had the larger 3 1/4" axles. At s/n 23001 ( series 3) the 4-pinion differential was introduced, which was December of 1968, so just say from 1969 onward they were all 4-pinion diffs. So, by that time, there were enough 2-pinion tractors that had failed, they were getting repaired with 4-pinion kits which required a new ring and pinion because the ring gear I.D. was milled out larger than a 2-pinion ring gear. A 200 and 7000 differential is essentially the same as any 190XT 4-pinion diff. I would guess there could be as many as 50% of the 190XT's that have been repaired to 4-pinion diffs. If the tractor came from an area where there was moldboard plowing done, it has probably been changed to 4-pinion because the 2-pinion didn't hold up very well. 2-pinions hold up to 1200 HP if the pin is needled/hardened and the backside of the side gears are machined to accept flat roller brgs. EITHER DIFFERENTIAL MUST HAVE THE OIL LEVEL RAISED TO FLOOD THE DIFF TO HAVE ACCEPTABLE LIFE.
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Posted By: brad durst
Date Posted: 28 Mar 2020 at 10:01am
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ok. so how are peaple putting the 4 pinion in the older 190's the ring gear assembley out of the 200 will not fit into my older small axle 190 rear end housing. so im using my 200 rear end housing and my small axles. witch that all seems to work fine
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Posted By: DrAllis
Date Posted: 28 Mar 2020 at 6:45pm
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They are either finding the correct "4-pinion" ring gear/ring and pinion set from a 190XT that had a 4-pinion in it, or milling the hole in their 2-pinion ring gear to be able to slide onto the 4-pinion diff case.
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Posted By: brad durst
Date Posted: 29 Mar 2020 at 8:02pm
Posted By: Bobo Husker
Date Posted: 04 Apr 2020 at 11:45am
Can anybody verify if the later d19 differential side gears were 23 spline or 25.
Thank you in advance
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Posted By: DrAllis
Date Posted: 04 Apr 2020 at 7:42pm
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Same as a 190XT/200 whatever that is.
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Posted By: Bobo Husker
Date Posted: 04 Apr 2020 at 8:04pm
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Ok so should be 25 spline. I looked the part up on a parts house and they said 23 spline so was wondering.
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