Description: 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 for game-changing acceleration on the track. This keeps performance engines in the optimal power band while allowing a longer pull in first and second gears, improving consistency and performance. Manufactured and engineered for outstanding durability, the carrier's gears are precision-ground to OE standards, thrust washers feature highly wear-resistant PTFE-coated material and the captured bearing is thicker late design. Lube channels direct oil to the pinion pins, and the carrier can be disassembled for inspection and service. Keeps engine in power band on 1-2 and 2-3 shifts Delivers longer pull in 1st and 2nd Gears Six-pinion planet loaded with advanced durability features No special tools or machining required Contents Carrier Assembly Input Sun Gear Warning: Cannot be used with '07-later reaction shaft. For these applications source an '06-earlier reaction shaft or use Sonnax universal heavy duty reaction shaft kit 74602-01K. See instructions for details.
Price: 695.5 USD
Location: Columbus, Ohio
End Time: 2023-09-03T16:20:17.000Z
Shipping Cost: N/A USD
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Item Specifics
Return shipping will be paid by: Seller
Returns Accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Return policy details:
Brand: Sonnax
Other Part Number: S74582HDK
Items Included: Heavy Duty Front Planet with Sun Gear
Manufacturer Part Number: 77284-K
Universal Fitment: Yes
Vintage Part: No
Performance Part: Yes
