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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Manual To Automatic?

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Old Sep 20, 2007 | 09:51 PM
  #1  
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truckman15
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Manual To Automatic?

What all is needed to change to put a automatic trany in a 1981 ford f100 with a 4.9 300 inline six with a 3 speed manual?
 
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Old Sep 21, 2007 | 07:28 AM
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From: Kuna ID
Transmission
shifter(aftermarket would be easiest)
Tranny cooler
Possibly different driveshaft and crossmember
 
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Old Sep 21, 2007 | 09:35 AM
  #3  
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1980FORD
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From: Greensburg,PA
New flex plate for automatic also.
 

Last edited by 1980FORD; Sep 21, 2007 at 09:42 AM.
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Old Sep 21, 2007 | 08:31 PM
  #4  
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From: savannah,ga
tranny cooler lines
starter
kick down rod or tv cable for aod
maybe back up lite wires and neutral saftey wires or switches
I did this using a 1983 e150 as a donor into a 76 e150
using a donor truck is easiest way to get all parts at one time
 
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Old Sep 23, 2007 | 03:19 AM
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Originally Posted by mhg
using a donor truck is easiest way to get all parts at one time
Definitely, I was suprised how many times I had to pull other parts off the donor truck when I did my auto to stick conversion.
 
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Old Sep 23, 2007 | 09:59 AM
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i would assume the drive shafts should still work on the auto. i took and 86 f250 and it had a 6.9 with manual. i dropped a 400 in it with a c6 and kept the same drive shafts and have yet to have any problems from it.
 
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Old Sep 24, 2007 | 09:41 AM
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They could work, but some trannies have a slip joint on the back and other have a fixed yoke. It depends on what kind and when the tranny was built. I did the same thing with my 67 stang, went from an auto to a stick and used my original DS. When I did the swap in my truck, my auto DS was a fixed yoke while the new stick DS had a slip joint.
 
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