INPUT SHAFT SHIPPING SEAL TWIN-COUNTERSHAFT EATON FULLER

SUBJECT: INPUT SHAFT SHIPPING SEAL

MODELS: 1989 C6, C7 AND 1990 6H, 7H TOPKICK/KODIAK TRUCKS WITH EATON FULLER M/T RT-6610, RT-6613, RT-7608LL (RPO, MPH, MPE)

When disassembling a twin-countershaft Eaton Fuller transmission built after early 1989, you may notice a small rubber lip seal on the input shaft under the front cover. Previously built twin-countershaft transmissions were not manufactured with an input shaft shipping seal. The shipping seal was added for the sole purpose of eliminating oil leakage during shipment.

If this seal is found during repair on a twin-countershaft transmission, it should be removed. There is no need to install a replacement as this is a non-serviceable item. The transmission continues to be sealed during operation by the spiral cut grooves on the input shaft

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