Sonnax 77284-k Transmission Front Planet Kit, 2.84 Ratio W/ Input Sun Gear 4l60e

Details:

4L60, 4L60-E, 4L65-E, 4L70-E 2.84 Ratio Input Carrier Kit Part No. 77284-K The steepest first gear ratio of any four-speed automatic (3.06) belongs to the GM 4L60 (700-R4)/4L60-E family of transmissions. The shift from 3.06 ratio (1st Gear) to 1.63 ratio (2nd Gear) is a dramatic RPM drop that causes performance engines to fall out of their power band. Sonnax 2.84 input carrier kit 77284-K transforms the popular 4L60 series from an OE “wide ratio” 3.06/1.63 to a “close ratio” 2.84/1.55 fo...

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