LT1 Formula Upgrade - Putting Your Rear In Gear Part II - Tech at Automotive.com
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LT1 Formula Upgrade - Putting Your Rear In Gear Part II - Tech - Panhard Bar - GM High Tech Performance Magazine

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LT1 Formula Upgrade - Putting Your Rear In Gear Part II - Tech
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Once broken in on the street, the rearend didn't make a peep-indicating a good gear install. The tranny proved a little rough even after a few miles and the softer calibration, breaking loose the tires on virtually every 1-2 shift (even at part throttle); however, I am waiting to pass judgment until we test out a looser converter and the fluid is changed (as recommended), after a few thousand miles. For the track, the TCI 4L60E proved lightning-quick and ideal, but the tight 2000-2200-stall converter would not allow proper weight transfer before locking up. Though this converter was great on the street and an autocross course, it wasn't cutting it even on E-town's well-prepped track. Additionally, the worn stock front brakes were causing the Formula to break the beams prematurely when stalling. While doing my best to stall the Formula, it didn't seem capable of besting a 13.39 at 102.88 mph or a 1.910 short time (on separate runs). This improvement over the Formula's previous best of 13.77 (with 2.15 60-foots) was deemed totally unacceptable by both Editor "Hammering" Rick Jensen and myself, given the long list of mods done in between. You better believe we're going to rectify this problem ASAP. [Photo by Frank Cicerale]

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