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Clark C500 Y50:
Transmission fluid & model year id

Older Clark, C500 y50.
Sat for years and im bring back to life.
Shortly after i got it running / moving it around it blew one of the crunchy lines
Pulled the 3 hyd lines going in and out of radiator to trans and filter housing to have made up.
Now need to figure out what fluid was in it... was dirty / black but feels like atf. Unsure.
Trans has the 2 lever on left side dash H/L F/R

Serial number
Y355-463-2530 471


If anyone could point me to proper fluid for this and possibly the model year of this thing.
Thanks

• Posted 9 May 2025 11:02
• Discussion started by Scott_Dacri
• California, United States

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Thank you John , But I found the year out yesterday afternoon..
April - 1971..supposed
If you have the part numbers for manuals for this unit or a place to go for them , that would be great.
Thanks again

• Posted 11 May 2025 03:46
• Reply by Scott_Dacri
• California, United States

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I will look up year it was made and let you know I have several repair manuals for all of Clark

• Posted 11 May 2025 03:28
• Reply by John_Bradley
• Texas, United States

Jb69

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Thank you John

• Posted 11 May 2025 01:44
• Reply by Scott_Dacri
• California, United States

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Most Clarks used Dextron 2 in trans
Up to the newer units
Clark dealers sell a trans fluid that is compatible to all of their units old to new

• Posted 10 May 2025 00:20
• Reply by John_Bradley
• Texas, United States

Jb69

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