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SportTrac Discussion
General Sport Trac Discussion
Gen 2 Rear Diff
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<blockquote data-quote="gavin T" data-source="post: 1034125" data-attributes="member: 73737"><p>follow up :</p><p></p><p>ran the 80-90 for 1 week. put about 200 -300 miles on it. and the truck felt good but i could hear a high pitch groan/ hum form the rear diff. (2 qts) after swapping my broken drive shaft and the diff fluid i saw 1 mpg increase. after a week i put the 74-140 gear oil (~2Qts) back in and lost some mpg but the diff is not squeeling or humming so i am happy. </p><p>btw my rear diff fluid was oem... 135k on it... boy oh boy did it smell and i had a ton of metal on the fill / drain plug. they did there job!</p><p></p><p></p><p>* had to drive the car around for 20 minutes in order to heat up the rear diff enough to use a BREAK BAR to get the drain plug out. it was seized on. put anti sieze on them both and snugged them up. going good!</p><p></p><p>now if i could only pin point this damn vibration <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p></blockquote><p></p>
[QUOTE="gavin T, post: 1034125, member: 73737"] follow up : ran the 80-90 for 1 week. put about 200 -300 miles on it. and the truck felt good but i could hear a high pitch groan/ hum form the rear diff. (2 qts) after swapping my broken drive shaft and the diff fluid i saw 1 mpg increase. after a week i put the 74-140 gear oil (~2Qts) back in and lost some mpg but the diff is not squeeling or humming so i am happy. btw my rear diff fluid was oem... 135k on it... boy oh boy did it smell and i had a ton of metal on the fill / drain plug. they did there job! * had to drive the car around for 20 minutes in order to heat up the rear diff enough to use a BREAK BAR to get the drain plug out. it was seized on. put anti sieze on them both and snugged them up. going good! now if i could only pin point this damn vibration :( [/QUOTE]
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SportTrac Discussion
General Sport Trac Discussion
Gen 2 Rear Diff
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