34322 02K IN

2018-09-17

: Sonnax 34322-02K-In 34322-02K-IN 4672 instructions part uploads

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GM 400, 425, 4L80-E, 4L85-E
Extreme Duty
Forward
Clutch Hub Kit
Part No.
34322-02K
• Bearing
• Hub
WARNING: Compared to OE or other replacement forward clutch hubs, this hub and bearing
combination has an additional .025" thickness designed-in to reduce endplay and provide
further endplay adjustment options.
NOTE: No machining is required for typical installation.
NOTE: This forward clutch hub and bearing combination shifts the support of the forward clutch hub
from the main shaft to the direct housing and sun gear shaft.
NOTE: Preassemble unit to check and set endplay before nal transmission assembly.
Directions
a. Stack bearing and forward clutch hub onto direct clutch housing.
b. Place bronze washer on top of forward clutch hub.
c. Place forward clutch housing on top of bronze washer.
d. Install pump cover and gasket.
NOTE: For 4L80E, install necessary overdrive components to allow endplay check.
c. Check front end play. Ensure output shaft is pre-loaded forward when checking front
endplay. See front endplay selective washers and specications (Figures 1 & 2).
d. If endplay is too tight, material can be removed from following locations as needed.
• Front of direct clutch housing
• Rear of forward clutch hub
• Rear of forward clutch housing
Bearing
Hub
©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company 34322-02K-IN 09-10-18
866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Page 1
Instructions
HIGH PERFORMANCE TRANSMISSION PARTS
PERFORMANCE
4L80E Front Selective Thrust Washers
Thickness Identication Color OE # INDUSTRY #
.123" Black 8677575 34211HE
.107" Green 8677574 34211HD
.091" Brown 8677573 34211HC
.075" Red 8677572 34211HB
.059" Blue 8677571 34211HA
Front End Play Specication .004–.022"
Rear End Play Specication .005–.025"
THM400 Front Selective Thrust Washers
Thickness Identication Color OE # INDUSTRY #
.130" Purple 8623306 34211G
.117" Black 8623305 34211E
.106" Green 8623304 34211D
.095" Brown 8623303 34211C
.084" Red 8623302 34211B
.073" Blue 8623301 34211A
.062" ** Yellow 8623300 34211
Front End Play Specication .003–.024"
Rear End Play Specification .007–.019"
**Check to ensure lube passage at rear of pump cover is not crowded by forward clutch housing.
Figure 1
Figure 2
©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company 34322-02K-IN 09-10-18
866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Page 2
Instructions
HIGH PERFORMANCE TRANSMISSION PARTS
PERFORMANCE
EXTREME DUTY FORWARD CLUTCH HUB 34322-02K

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