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Discussion Starter · #1 ·
Ok...
Whats going on? My new creampuff--'61 Tbird 390cid with FMX will not shift into 3rd until its been driven 5+ miles. Shifts 1st to 2nd fine in D1. Doesn't Slip. What's different about this '61 FMX compared to '68+ years?...transgo shift kit doesn't go on earlier models?

Car sat 3 years before I bought it last week. Tranny fluid was low, but now is at capacity. Low Vacuum? Varnish in valvebody?
 

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Since the car has been sitting for 3 years i would be having a good check of the modulator hose and check you are getting good vacuum at the modulator...
 

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Discussion Starter · #3 ·
I'll make sure to give it the once over. Anyone know the differences betweeen these early FMX's versus their later progeny? Who here speaks FMX?
 
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