Looks like that Redline fluid I just put in the rear end was for not.
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I can deal with it, adding this....
https://www.summitracing.com/parts/DTL-912A317
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Good news $50.00 rebate, more civilized traction (was considering Lock Rite)
Bad news it will be a bit before I can afford to have it installed.
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Might not need that $WD transfer case after all? Time will tell.