4R70W (2001 & UP), 4R75W D i s t r i b u t o r D a t a S h e e t PART NUMBER 76507F-01K COMPLAINT Cause SECONDARY CO
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4R70W (2001 & UP), 4R75W
D i s t r i b u t o r D a t a S h e e t
PART NUMBER 76507F-01K
COMPLAINT Cause
SECONDARY COMPLAINTs
Cross leaks at valve body, separator plate cracking • Forward and direct clutch failure 4R70W Valve Body
Lack of reinforcement allows oil to push separator plate up, resulting in cross leaks and cracked plate.
Bolts
COrrection This new Sonnax bolt-on plate provides mechanical clamping of lower valve body plate and gasket, eliminating cross leaks, cracks or plate flexing.
Valve Body Retainer Plate
Retainer Plate Drill & Tap Here
76507F-01K 1 Retainer Plate 1 Gasket 2 Bolts
Gasket
Sonnax Part Summary The valve body stiffener plate in the 2-3 accumulator area was eliminated on 2001-up 4R70W & 4R75W transmissions. Oil pressure builds up in unused cavities under the separator plate causing the plate to flex upwards as much as .010", allowing forward and direct oil passages to cross leak. The Sonnax retainer plate 76507F-01K bolts in place and provides the clamping force to compress the lower valve body gasket. This prevents cross leaks, separator plate flexing and cracking, so that cracked separator plates can be reused. Features & Benefits Allows previously cracked separator plates to be reused. Prevents cross leaking. No special tools required. Installs in just minutes.
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Forward Clutch Oil
Crossleaks
You need this if... Upon inspection, there are signs of poor compression in the underside area of the used gasket. Poor compression indicates probable forward and direct oil cross leaks.
©2009 Sonnax Industries, Inc.
Direct Clutch Oil Check underside of gasket here.
76507-01K Rev:-, 76507-01K
06-26-09
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