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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.
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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]
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4.7 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Excellent
Color: Navy Blue, Size: Large
Excellent product. Attractive weave design. Fabric is comfortable and thick enough to hold its form without being too warm. Holds up well to machine washing. I ordered a second set in another color and also an other shirt in a contrasting color and design. Perfect fit.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
It fits true to size.
This fits my husband perfect. It is not too sporty but sporty enough. If we were going somewhere dressed casual this suit is it and he would still be comfortable. He is a sporty guy always. It is nice to see him a little more dressed, but still comfortable. This is great material.
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Reviewed in the United States on January 6, 2026
★★★★★ 5
Quality is great!
Absolutely gorgeous! True to fit... Great product! I love it! ❤️
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Reviewed in the United States on March 19, 2026
★★★★★ 4
Definitely stylish and true to fit
An amazing set fits perfectly. I would necessarily call it a track suit because it’s more stylish than that however, the comfort is track suit / walking suit feeling. I got mine in 2x and it fits as I expected it to so yes it is true to size. The colors don’t fade and the weight of the set feels like it was made with quality material, not some flimsy sown together item full of loose strings.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Fit
Color: Navy Blue, Size: X-Large
This fit perfectly my son looked great in it.
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Reviewed in the United States on June 4, 2026