Harsh Reverse Engagement, 1st Shift of the Day (Replace Upper Control Valve Body Spacer Plate Gasket)

Some owners may comment on a harsh garage shift from Park to Reverse during the first shift of the day. The condition will not repeat itself after the first shift of the day, but will return the next day during the first shift of the day. If the customer concern does not exactly match this description, additional diagnostics should be performed.

Condition may be caused by an unintended transmission fluid pressure spike occurring during the first Park to Reverse shift of the day due to air in the reverse hydraulic circuit (32) being fed into the line pressure circuit (6) across gasket slot number 41, (Figure 1, Item 1).

Replace the gasket between the spacer plate and the case cover with the new style gasket that has eliminated the gasket slot number 41 (Figure 1, Item 2). The new gasket has a white stripe across one side (Item 3) to help identify it as the new style gasket in the production assembly process. A "Service Only" kit, P/N 24221401, contains the new gasket. Early kits contain gaskets taken from production inventory and have white stripes. The white stripe is removed in later production and later gasket kits.