I have a 96' chevy suburban w/ a vortec engine, need any recommendation for adding

The Iceman

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some horsepower? the problem is its geared for towing, and has trouble with the 4spd tran with O/D. it stays in the third gear way to long before shifting to the next and then longer for the overdrive to kick in. on hot days its a short situation, but when its cold its wait and see .causes it use more fuel than when its hot.
 
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