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SportTrac Discussion
Engine & Drivetrain
Differential service - slight whining
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<blockquote data-quote="DILLARD000" data-source="post: 1041707" data-attributes="member: 74901"><p>Assuming 2WD rear differential?</p><p>2001 ExST OwnersManual calls for </p><p>80w90 in OpenSlip Diffs & 75w140+Additive in TracLok\LimitedSlip Diffs.</p><p>MilkyWhiteSludge indicates water in the oil; has the truck ever been driven thru deep water or flooded?</p><p>I'd open cover & fully drain the Diff one more time,</p><p>give it a good spray down with BrakeCleaner, let that drain+dry,</p><p>refill with OwnersManual spec 75w90.FullSyn\80w90.FullSyn or 75w140.FullSyn+Additive,</p><p>but use a premium HiTemp\HiPressure brand like AmsOil or TriboDyn.</p><p>If that don't quiet the whine, then a rebuild or new Diff may be needed.</p></blockquote><p></p>
[QUOTE="DILLARD000, post: 1041707, member: 74901"] Assuming 2WD rear differential? 2001 ExST OwnersManual calls for 80w90 in OpenSlip Diffs & 75w140+Additive in TracLok\LimitedSlip Diffs. MilkyWhiteSludge indicates water in the oil; has the truck ever been driven thru deep water or flooded? I'd open cover & fully drain the Diff one more time, give it a good spray down with BrakeCleaner, let that drain+dry, refill with OwnersManual spec 75w90.FullSyn\80w90.FullSyn or 75w140.FullSyn+Additive, but use a premium HiTemp\HiPressure brand like AmsOil or TriboDyn. If that don't quiet the whine, then a rebuild or new Diff may be needed. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Differential service - slight whining
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