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Help with Limited Slip


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I have a Brush Hog TH420 side by side and having trouble with spinning one tire. The other tire will kick in but only after you spin like hell and dig a hole. The final drive /gearbox is a Comer Industries out of Italy. The part number is 9.485.003.00, SN 0082, Date is E04.  I can find a parts breakdown. When you bring up the transaxle it shows the internal differential but no breakdown. It does say see diff assembly but there is no diff assembly.  I'm not sure if this type is no some other side by side. 


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With the older cars with limited slip rear ends you had to use certain fluid. It might be the cause of your problem.  Has it ever been changed?  How many hours, miles since the last change?           Manual says to use and change the transaxle fluid.                                                        Mobilube HD LS 80W-90  (or equivalent)                                                                                                                                                                                                                                         https://www.manualslib.com/manual/878997/Bush-Hog-Th420.html?page=54#manual

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