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Old 10-21-2009, 04:42 PM   #20
Wrenchbender Ret
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
Re: 2004R trans with 3.08 axle

The TC lockup depends on what system you use. I get the vacuum switch off a late 80's van & hook it to ported vacuum. I use a pressure switch on the 4th gear pressure outlet. It only locks up in 4th gear with cruising throttle.
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