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Ford 3500 backhoe

Jim 68 Ford 3500 backhoe, trans clunking in low range only.
Both the trans & rear end where over full. Approx. 6 qts & 12 qts respectively. The trans was milk. The rear end has brownish/red oil in it. I would have guessed gear oil but neither of them smell like gear oil and is not as think. And it is thicker than automatic trans fluid. It's about as thick as motor oil. Rear end has no lift arms and no live PTO. Trans is a 6X4. What should both have in them?

Grant Jim,

Most guys use Universal Tractor Fluid (UTF) in the trans and rear end. Equivalent to Ford specification 134D. This is a Ford approved practice. You can get it in 5 gallon buckets at Tractor Supply Stores, auto parts stores, Walmart, etc. Read the labeling on the bucket to be sure it meets Ford spec 134D.

The milky fluid in the transmission is due to water entry. The shifter boots on the shift levers are probably deteriorated/leaking.

My fluid gets milky over time (years) and my tractor is never stored outside. So some of it is due to condensation.

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