GM uses a wear plate to prevent the pump from wearing the magnesium case. However, the wear plate fails prematurely, allowing leaks to develop as the lugs wear through the case. Sonnax offers an improved version of the OE wear plate using harder materials.

Fits NP136, 236, 246 and others with magnesium cases
Harder than OE version
Drop-in replacement

More From This Category

RTS OE Automatic Transmission Modulator Valve, GM TH350, TH400, Adjustable Single Red Stripe , Each

RTS OE Automatic Transmission Modulator Valve, GM TH350, TH400, Adjustable Single Red Stripe , Each

$34.51

Sonnax High Clutch Drum Flange, Powerglide 1.69/1.58 Ratios, Each

Sonnax High Clutch Drum Flange, Powerglide 1.69/1.58 Ratios, Each

$88.62

Sonnax Heavy Duty Forward Clutch Hub, GM, 400, 425, 4L80-E, 4L85-E, Each

Sonnax Heavy Duty Forward Clutch Hub, GM, 400, 425, 4L80-E, 4L85-E, Each

$208.51

TCI Automatic Transmission Rebuild Kit, Pro Super, GM, 700R4, Kit

TCI Automatic Transmission Rebuild Kit, Pro Super, GM, 700R4, Kit

$839.05

Sonnax Manual Shift Shaft Kit, GM, 4L80-E Short '91-'94 W/O Nss, Each

Sonnax Manual Shift Shaft Kit, GM, 4L80-E Short '91-'94 W/O Nss, Each

$47.17