The addition of the billet intermediate servo, billet band anchor and billet band strut allow this kit to address the common know shortcomings of this 48RE transmission. This kit also comes with a new billet blueprinted 4.4 band lever. The new thrust washer kit also contains selective for setting endplay.
The 27-spline, triple-disc billet torque converter included with this kit comes standard with a 2,000 stall speed (Part #: 2761848-3D), with other stall speeds available, depending on your needs. The torque converter is lined with carbon graphitic clutch material and equipped with a precision CNC machined forged billet apply piston to ensure no deflection occurs. This is an upgrade from the 23-spline, triple-disc billet converter that comes in the #SC-48-4 kit.
This rebuild kit also includes our much larger, one-piece, billet 27-spline input shaft. This shaft is made from 300 maraging steel and is then heat treated and stress relieved to handle the additional demands of higher torque and stress loads. This shaft is precision ground to exact tolerances. We're also including our exclusive 27-spline stator support with this kit to accommodate the larger input shaft.
This Category 5 48RE master rebuild kit also includes a band upgrade. While some of our other kits include a Raybestos Pro Series carbon fiber flex band, in this kit we use our billet rigid band. This band is CNC machined from billet steel and then lined with carbon graphitic lining to ensure unmatched performance by any other manufacturer.
In our full competition builds, safety is always at the forefront. One of the biggest upgrades to this kit is the addition of our Ultimate Weapon Billet Direct Drum. This billet direct drum is made from 4140 billet steel; this is to ensure the utmost safety when you consider the direct drum is traveling 2.2 times the speed of the engine. As you can imagine, when things let go at that speed, the results are catastrophic, and we've all heard the stories of severed limbs with transmission failures. This drum also maintains conformity at higher RPMs, reducing deflection when the band is applied. This combination has proven to dramatically reduce shift times. In addition to the safety features, this drum has an extended snap ring groove to allow the inclusion of more clutches. This is matched perfectly with the extended height of our 27 spline input shaft and hub, also included in this kit.
Our Category 5 SunCoast 48RE rebuild kit also includes upgrades to the flexplate. The factory 48RE flexplate is replaced with our SunCoast billet 48RE one piece unit. This new 48RE flexplate exceeds 29.3 SFI certification. This new 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.
We also include the addition of new apply pistons for both forward and direct. SunCoast Category 5 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. The forward piston is also 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 our 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 the correction you've been looking for.
We also replace the factory intermediate shaft with a billet one. Designed for high torque & heavy towing applications, the shaft is precision machined and ground from 300 Maraging steel (VASCOMAX) and heat treated for superior surface toughness and durability. It is made for high torque engines and is an ideal replacement part to satisfy the demands for extreme off-road service and high performance applications. The intermediate shaft is spline-machined with large blended radius to reduce common fractures associated with the OEM design.
Lastly, we include a billet output shaft. Designed for higher horsepower/torque engines, this performance product has been tested in excess of 1,400 ft/lbs of torque. Shaft is machined from 300M material then Heat Treated for torsional strength and precision ground on all critical diameters.