Sonnax BW-SD-4 inner damper springs are for the BW 310mm LU (Chrysler A618), 47RE and 48RE Cummins diesel. These springs replace worn and weak OEM springs that may have taken a set.
The much weaker .162" wire outer springs used in A618, 47RE dampers have long been know to bottom out in TC clutch engagement. This harsh clutch engagement may eventually cause the turbine shaft to break along with other transmission components. Chrysler upgraded to a larger .177" wire diameter outer spring on the 48RE. Although this spring has a 43% increased damper capacity over the earlier version, it is still prone to bottoming out, especially if the diesel engine is chipped or modified for greater torque.
Improves performance of earlier two stage damper
15% More damper torque capacity than the OE 48RE Springs
65% More damper torque capacity than the OE 47RE Springs
One damper assembly requires 8 springs

More From This Category

Crow Cams 11/32 RETAINER ECOTEC CONICAL

Crow Cams 11/32 RETAINER ECOTEC CONICAL

$204.59

DBA Rear Street Series Brake Pads, For Holden Commodore VF / 2013-17, Kit

DBA Rear Street Series Brake Pads, For Holden Commodore VF / 2013-17, Kit

$57.30

Haltech Merchandise, Classic T-Shirt Black with Blue Logo Size: 3XL

Haltech Merchandise, Classic T-Shirt Black with Blue Logo Size: 3XL

$35.00

Nitrous Express Adapter Fitting, Y-Block, Pure-Flo, Aluminum, Black Anodized, -4 in. NPT Male Inlet, -4 AN Male Outlets, Each

Nitrous Express Adapter Fitting, Y-Block, Pure-Flo, Aluminum, Black Anodized, -4 in. NPT Male Inlet, -4 AN Male Outlets, Each

$61.44

ARP T-Shirt, Short Sleeve, Cotton, Ash Color, ARP Logo (Front and Rear), Men's Medium, Each

ARP T-Shirt, Short Sleeve, Cotton, Ash Color, ARP Logo (Front and Rear), Men's Medium, Each

$45.21

DBA Rear Street Series En-Shield Brake Rotor, 284mm, For Kia Niro HEV&PHEV DE 1.6L 21, Kit

DBA Rear Street Series En-Shield Brake Rotor, 284mm, For Kia Niro HEV&PHEV DE 1.6L 21, Kit

$126.20