Tranny Slipping?

[jjackso2]

01 Sport, V8, 128K miles

this past week, on long trip, it felt like the transmission was slipping. It happened about 4 times over 350 miles. traveling at 70-75 mph, get a loud "clunk" like the tranny tried to do a quick 5-4-5 shift, or the trans disengaged. Has anyone had something similar? Is it the tranny or something else?

 

[chocolat1701]

Solenoid packs or coils going bad. Common issues with this car did you get a check engine light

 

[jjackso2]

no lights...how would cop going bad cause this? Would it be this intermittent?

 

[mikeyswood]

That's your overdrive servo going bad. The case of the transmission has actually worn out.

It's a piss-poor design that Ford still produces.

The fix is actually pretty simple:

Get the corrected servos from http://www.fordservoboretransmissionfixsolution.com/

Add a bit more of a chamfer:

Then (carefully yet forcefully) shove the caps back on:

You may want to consider doing your solenoid and 3-4 spring at the same time.