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4L60E 4L65E 4L70 4L70-E SONNAX HP-4L60E-01 PERFORMANCE PACK 1994-ON. THIS KIT WILL FIT THESE AUTOMATIC TRANSMISSIONS GMC CHEVY BUICK CADILLAC PONTIAC OLDSMOBILE 4L60E 1994-ON 4L65E 2001-ON 4L70 SONNAX Part No. HP-4L60E-01 PUMP PARTS INCLUDE: Boost Valve with O-Ring, .490� Elevated Pressure Regulator Spring High RPM Pump Slide Spring 1 Spacer SERVO PARTS INCLUDE: 4th Servo Return Spring Servo Cushion Spring Servo Piston D-Ring Kit CASE PARTS INCLUDE: 3-4 Accumulator Piston Kit 3-4 Accumulator Spring Servo Release Check Valve BODY PARTS INCLUDE: Forward Accumulator Kit Accumulator Valve Shim Twist Drills ACCUMULATOR PARTS INCLUDE: 1-2 Pinless Accumulator Piston Kit 1-2 Accumulator Inner Spring 1-2 Accumulator Outer Spring 1-2 Accumulator Waved Spring Accumulator Housing Spacer Features & Benefits � Shorter shifts which get progressively firmer with load � Faster pressure increase and higher overall pressure for greater clutch/band holding power � Three ultra-reliable, patented, billet pinless accumulator pistons � Unique 1-2 accumulator spring combination for �shifts with character� � Improved high RPM pressure � Third accumulator valve gets the 2-3 right the first time, every time � Consistent results, no guessing on calibration � Prevents worn accumulators and separator plate � Optional TCC on-off conversion prevents excess TCC pressure Sonnax Performance Pack HP-4L60E-01 combines innovative heavy duty/performance calibration for firmer shifts under load without sacrificing low-speed drivability. The precision components in this kit upgrade the 4L60-E for maximum performance and durability by recalibrating pressures, recalibrating shift accumulation and including improved parts for areas that commonly wear. This kit is suitable for any heavy duty application and is a critical foundation for other upgrades when modifying the 4L60-E for high performance use.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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