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Description
SunCoast Category 3 600HP 48RE Transmission Rebuild Kit w/ Flex Plate 03-07 Dodge/Ram 5.9L CumminsSunCoast's Category 3 rebuild kit for the 48RE in 2003 2007 Dodge Diesels contain the essentials to rebuilding your transmission. This kit is recommended for customers seeking to build the stock 48RE with improvements made to the band, band actuation, servos, accumulator piston, torque converter and input shaft. With the addition of a billet intermediate servo, billet band anchor and billet band strut, this kit addresses commonly known shortcomings of
SunCoast's Category 3 rebuild kit for the 48RE in 2003-2007 Dodge Diesels contain the essentials to rebuilding your transmission. This kit is recommended for customers seeking to build the stock 48RE with improvements made to the band, band actuation, servos, accumulator piston, torque converter and input shaft. With the addition of a billet intermediate servo, billet band anchor and billet band strut, this kit addresses commonly known shortcomings of the 48RE transmission. Rated for 600HP, this kit also comes with a new billet blueprinted 4.4 band lever as well as a new thrust washer kit containing selections for setting endplay.
Another addition to this kit is SunCoast's billet one piece input shaft. The shaft is made from 300 maraging steel and is then heat treated and stress relieved to handle the demands of higher torque and stress loads from towing and street use. There's no need to worry about fitment either, as each shaft is precision ground to make it a true drop-in replacement.
The Category 3 48RE master rebuild kit also includes a band upgrade. SunCoast includes a substantial upgrade from the factory transmission by crossing over to a billet rigid band. The band is CNC machined from billet steel and then lined with carbon graphite lining to ensure unmatched performance over any manufacturer.
SunCoast Category 3 48RE rebuild kits also include an upgraded flexplate. The factory 48RE flexplate is replaced by SunCoast's billet 48RE one-piece unit. The billet 48RE flexplate exceeds 29.3 SFI certification and it's one piece design is CNC machined from a single forging. Specific reliefs are machined out from between the converter mounting area and the crank flange to enable minimal designed torsional flex.
The last upgrade to this kit is the addition of new apply pistons for both forward and direct. SunCoast Category 3 48RE master rebuild kits replace the factory cast pistons with new billet apply pistons. The direct piston is also included with new custom calibrated springs and the forward piston is replaced with a new billet piece. These improvements allow higher clamping forces without any deflection providing a much more direct shift feel and eliminating potential cross leaks within the drum.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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- Delivery 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]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Genuine Lexus Filter / Quick Delivery
Initially I had installed non-genuine Lexus filter, which the seller claims it fits Lexus RX. That filter fits (kinda). After installing the air-filter and closing the lid, I could see the edge of the filter because the lid did not close tightly. I am not a mechanic, but I was concerned. Hence, I ordered the genuine Lexus filter from Lexus dealer through Amazon. I paid twice more than non-genuine filter (including extra shipping charge of $10.00).
Genuine filter arrived in the FEDEX box (looks and feels pretty sturdy enough to protect the filter) only 2 days after I placed the order. I have just replaced the filter. The lid closes perfectly. Although I spent total $40, for the peace of my mind, it's the money well spent.
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Reviewed in the United States on July 20, 2022
★★★★★ 5
Fits 2015 Lexus RX350
Perfect fit for a 2015 Lexus RX350.
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Reviewed in the United States on September 5, 2025
★★★★★ 5
Lexus, you have never let me down!
I asked for original equipment and that is what I received. Delivery only took a few days from a dealer mid way across the country. A perfect FIT.
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Reviewed in the United States on November 7, 2025
★★★★★ 4
Great Filter - shipping needs to be improved
The air filter was great and would recommend the OEM filter. My only
Complaint is that they didn’t ship it in a box but only slapped on a shipping label on to the original air filter box.
It took about a week to get to me (Arizona) and the box looked really beat up and luckily the filter was still ok by the time it got to me. Recommend putting it in a box to protect it from damage.
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Sandy
Exact fit for my 2022 RX 350
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Reviewed in the United States on September 4, 2025