Aftermarket LSD/diffy?
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Joined: Mar 2010
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Aftermarket LSD/diffy?
I recently purchased a one-owner 2000 Expedition XLT 5.4L, 9.5 rear w/102K miles. After being assured (by the Chevy dealer) that the only sounds I heard from the drivetrain were "normal" sounds in 4WD when not in low-traction situations, I think I've got the rear-end LSD chatter problem.
I drained both front & rear diffs, refilled with the OEM recommended fluid & added friction modifier in the rear. The chatter was immediately reduced but is now back, about 400 miles or so later. After looking on this forum - and others - it sounds like I'll be having to replace the clutch packs or whatever.
For now I don't have any heavy duty driving applications, but I do plan on towing an RV in the next year or so. Are there any reputable aftermarket parts that I could use? Seems that since the OEM parts have been having trouble for several model years I'd want to stay away from them if I can.
I drained both front & rear diffs, refilled with the OEM recommended fluid & added friction modifier in the rear. The chatter was immediately reduced but is now back, about 400 miles or so later. After looking on this forum - and others - it sounds like I'll be having to replace the clutch packs or whatever.
For now I don't have any heavy duty driving applications, but I do plan on towing an RV in the next year or so. Are there any reputable aftermarket parts that I could use? Seems that since the OEM parts have been having trouble for several model years I'd want to stay away from them if I can.
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Joined: Feb 2008
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Try another bottle of friction modifier before you go down the path to a rebuild. It could be a $5 solution for a $1000 problem. My dealership always uses two in higher mileage vehicles. It has worked fine in mine for the last 25k.
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LSD/diffy Update
Now have a grand total of 139K on the Expy, not a single problem since the original flush-and-fill of front & rear differentials.
Got the RV last year, towed about 800 miles without a "hitch".
Glad I didn't go down the rebuild route!
Got the RV last year, towed about 800 miles without a "hitch".
Glad I didn't go down the rebuild route!
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