Compression Ignition Addict
Join Date: Mar 2010
Location: zumbrota, mn
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not using the additive in the oil with posi will make it chatter going around corners. more than likely your posi is worn out. they were junk straight off the dealers lot. you can rebuild the posi and change the position of the shims and clutches to get more bite. i did that with my 03 and it made a huge difference.....
hello, my name is gary
new: 2008 f250 lariat 4x4 ccsb 6.4.....
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