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550 trans/rear end

Until someone that knows answers, I'm going to guess that they will. As I understand it, the 550 is mainly updated looks from the super55. BUT, this would not be the first time I was wrong. Chris
 
It depends which gears you want to use, the gear ratios are not the same between the two tractors.

Go to AGCOPARTS and look them up.

Rich
 
There was a couple of differentials used in those tractors. When the Super 55 tractors was changed to the 519 powertrain code the pinion shaft was part number 100 004A. This shaft had a tooth count of 13. It was later replaced by shaft number 100 004AA also 13 teeth. Those shafts will interchange. Later 550 tractors had a shaft change at Serial number 162 291, this shaft has 9 teeth.
 
(quoted from post at 16:10:41 01/13/19) There was a couple of differentials used in those tractors. When the Super 55 tractors was changed to the 519 powertrain code the pinion shaft was part number 100 004A. This shaft had a tooth count of 13. It was later replaced by shaft number 100 004AA also 13 teeth. Those shafts will interchange. Later 550 tractors had a shaft change at Serial number 162 291, this shaft has 9 teeth.
Click to expand...
Mine has serial nunber121735-519 and is a 13/53 I think I have found aback half for partsgood ring gear and carrier pinion in a bucket of parts may be good trans has been striped but parts in bucket will have to dig it out to see what is good
 
(reply to post at 08:07:48 01/14/19) [
/quote]
Turns out my parts find was no good the pinion cleaned up but was a 14 tooth which would make it a early S55 does any body know if it is possible to put a 14/53 gear set from a 55 in a 550 could use the extra speed
Click to expand...
 
(quoted from post at 13:26:35 03/07/19)
(reply to post at 08:07:48 01/14/19) [
/quote]
Turns out my parts find was no good the pinion cleaned up but was a 14 tooth which would make it a early S55 does any body know if it is possible to put a 14/53 gear set from a 55 in a 550 could use the extra speed
Click to expand...

Finally got my 550 in working order bought a parts tractor and did a Z split quick and easy still trying to find parts to built a second tractor. Got to say big thanks to Larry Hedgepeth of Canmer Ky For agreat deal on the parts tractor and Keith Center Of Keiths Tractors in Sevierville Tn. for letting me pick up from his yard saved me a lot of money and driving .
Click to expand...
 
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