Tranny problem??
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Tranny problem??
Really only happens when climbing a hill at highway speed. As load increases, truck approaches the point at which it should shift from O/D to 3rd (AOD). Instead of downshifting, the truck "shutters" badly. If I pedal hard, itll downshift and run/accelerate fine, but as soon as it shifts into O/D the shuttering begins again. When level or decline, the shuttering stops. During shuttering, the RPMs don't seem to change, and I don't really think its the engine, but I'm not 100% sure. Any thoughts?
Thanks people.
Also, besides decreasing timing, what can I do to be able to run 87 octane gas? 89 'Pings' too often at 11deg. BTDC and other settings (10, 12, 14.5), to even think about trying 87. Im not paying for 93 octane for only 15MPG.
1990 F150 302ci 4speed AOD
Thanks people.
Also, besides decreasing timing, what can I do to be able to run 87 octane gas? 89 'Pings' too often at 11deg. BTDC and other settings (10, 12, 14.5), to even think about trying 87. Im not paying for 93 octane for only 15MPG.
1990 F150 302ci 4speed AOD
