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 Is this a basically stock engine and if not what modifications? It will not idle @ 475-500 RPM in DR?
You need to get the engine in proper tune (if stock) to ensure correct engagement. This car also has a throttle-valve controlled trans (if not modified) that depends on correct accelerator linkage adjustments. You need a manifold vacuum gauge at the least to begin analyzing.
Again, engine and trans mounts food, u-joints and ant pinion wrap-up?
All of this must be done before pulling the trans ($$$).
Any chance of engine shots to see what you have?
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Has anyone djusted the linkage, speciacally the linkage that has the u Bolt?
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Adjusted
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All the replies have been very welcome.
Just to try to explain this better, which I am not good at?
I have a tach in the car, the idle is down to 500 after starting and before shifting into reverse.
The car shifts well going forward, shifts very smoothly at 2000.
The car does not slam after sitting when I shift into Drive.
It only shifts-slams (always) when shifting into reverse,
Is there a chance the linkage between the gear shift handle in the car and the control going into the transmission is not adjusted correctly.
Might it not be totally engaging thus the slam.
My other Y block car is a 57 see my Profile. shifts very smoothly into reverse.
thanks again for all the help. Harold
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Maybe this will help - https://forums.fordthunderbirdforum.com/threads/1957-automatic-reverse-clunking.18317/HIGH IDLE ENGINE/TRANS MOUNTS U-JOINT(s) - YOKE - REAR FLANGE PINION GEAR WRAP-UP Further explanations in attached post. As for throttle adjustments, there are three, pedal height, carb linkage and finally TV linkage which cannot be adjusted correctly before the first two. All linkages/bushings must be good. How long has it been since serviced with bands adjustments? Fluid service? Finding someone now who you can trust to work on one is a long shot. You need a WSM (and TRANS MANUAL) to go about it properly.
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