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Description
SunCoast Category 4 700HP 48RE Transmission Rebuild Kit w/ Flex Plate 03-07 Dodge/Ram 5.9L CumminsSunCoast's Category 4 48RE rebuild kit includes everything necessary to build your 2003 2007 Dodge 48RE transmission well beyond the capability of the factory 48RE. This high performance rebuild kit is for customers seeking significant improvement over the stock transmission along with improvements to the band, band actuation, servos, accumulator piston, torque converter, input shaft, output shaft and forward drum. The addition of the billet
SunCoast's Category 4 48RE rebuild kit includes everything necessary to build your 2003-2007 Dodge 48RE transmission well beyond the capability of the factory 48RE. This high-performance rebuild kit is for customers seeking significant improvement over the stock transmission along with improvements to the band, band actuation, servos, accumulator piston, torque converter, input shaft, output shaft and forward drum. The addition of the billet intermediate servo, billet band anchor and billet band strut allow this kit to address the common deficiencies of the 48RE. SunCoast's kit also comes with a new billet blueprinted 4.4 band lever. A new thrust washer kit also contains selections for setting endplay. For the enthusiast seeking high-power performance, this is the kit to transfer all that muscle to the road.The Category 4 kit also includes SunCoast's one-piece billet 23-spline input shaft. The shaft is crafted from 300 maraging steel and is then heat treated and stress relieved to handle the additional demands of higher torque and stress loads. Fitment isn't an issue as the shaft is precision ground to make it a true drop-in replacement.
Included in the kit is also a band upgrade. While some other SunCoast kits include a Raybestos Pro Series carbon fiber flex band, in this kit they use a billet rigid band. This band is CNC machined from billet steel and then lined with carbon graphite lining to ensure unmatched performance even by other manufacturers.
SunCoast's Category 4 rebuild kit also includes upgrades to the flexplate. The factory 48RE flexplate is replaced with a SunCoast one-piece billet unit. The billet 48RE flexplate exceeds 29.3 SFI certification which is the standard for racing and sled pulling. The billet one-piece design is CNC machined from a single forging, and specific reliefs are machined out between the converter mounting area and the crank flange to enable minimal designed torsional flex.
SunCoast Category 4 rebuild kits replace the factory cast pistons with new billet apply pistons. The direct piston is also included with new custom calibrated springs while the forward piston is replaced with a new billet piece. These two improvements allow higher clamping forces without any deflection occurring. Giving a much more direct shift feel and eliminating potential cross leaks within the drum.
Another piece included in this kit is a full billet rear clutch retaining hub, made from 4140 heat-treated, stress-relieved billet steel versus the OE cast piece. The factory cast retainer is known to fail in high torsional fatigue situations such as higher line pressure, commercial use and heavy-duty towing and hauling. This new billet piece is stronger, more reliable and is the performance correction you've been looking for.
Lastly, a billet output shaft is added to the Category 4 kits. Designed for higher horsepower/torque engines, this performance product has been tested beyond 1,400lb-ft of torque. The shaft is machined from 300M material then heat treated for torsional strength and precision ground on all critical diameters.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
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Product Reviews
★★★★★ 5
Very nice care basket!
Size: Classic Cozy Collection, Color: "Get Well Soon" Card
I really liked the quality of the mug. I gave this as a gift! I wanted to buy it for myself too! The tea and honey looked like good quality!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
★★★★★ 5
Perfect way to say I’m rooting for your wellness
Size: Classic Cozy Collection, Color: "Get Well Soon" Card
Sent to friend recovering at home from a heart attack who messaged me, “ Your incredibly thoughtful gift just arrived. Thank you so much sweet friend. It smells sooo good! Looking forward to slipping on the cozy socks and sipping a chai. I feel your love.” Thank you for offering a suitable way to express encouragement and comfort when words aren't quite enough.
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Reviewed in the United States on May 19, 2026
★★★★★ 4
Nice little gift.
Size: Classic Cozy Collection, Color: "Happy Birthday" Card
It was a nice gift for the price.
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Reviewed in the United States on November 15, 2025
★★★★★ 5
Worth it!
Size: Classic Cozy Collection, Color: "Sending Hugs" Card
Great gift, worth the purchase!
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Reviewed in the United States on February 19, 2026
★★★★★ 5
Beautiful Gift
Size: Classic Cozy Collection, Color: "Thank You" Card
Beautifully packaged gift box. We got it for my son’s 1st grade teacher and she loved it. Great quality and presentation, thank you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
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