Re: vibration maintaining cruising speed
I have this, I think, but in my case it is right around 40mph. It's like a harmonic distortion/low rumble and what you describe with giving it a bit more gas alleviates it - though if the speed limit is 40mph that is not much of a solution ha!
I suppose the same suggestions apply, even though I don't have a 700r4 but a TH350 (with 2 piece drive shaft) ? I wished I had a 700r4!
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Richard
'72 Chevy C10 Cheyenne *Super WHT/MED BRONZE/WHT
SBC 350 | TH350 | LWB | AC | Buddy Seats
Upgrades: Tilt | Front Sway Bar | Radio | Sliding Window | Bed Spare w/Lock
Bed Rails | Full LEDs | Courtesy Lights | Tachometer | Glovebox Lock & Light | Head Light Relays | *Upgraded Fully Super Trim
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