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

tranny swap

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Old Feb 14, 2006 | 05:29 PM
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From: Dover, DE
tranny swap

Looking to take a 5speed out of an 1990 f-150 4x4 and put in my 1986 f-150 4x4. Is ther any compatibilty issues that I should be worried about.
 
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Old Feb 14, 2006 | 07:46 PM
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What tranny is in the 86?
 
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Old Feb 14, 2006 | 08:09 PM
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From: Dover, DE
single rail overdrive 4speed
 
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Old Feb 17, 2006 | 03:28 PM
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From: Bored town OH
Originally Posted by ford grunt
single rail overdrive 4speed
Dont like the shift from 2nd to 3rd? I have the same tranny. 1st and 2nd are good, then when I shift into 3rd it bogs down unless I rev high in 2nd.
 
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Old Feb 17, 2006 | 08:56 PM
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Yep, my 82 F150 does the same thing from 2nd to 3rd.
 
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Old Feb 18, 2006 | 02:17 AM
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Yea, makes me not wanna tow or haul any heavy loads, I'd have to rev 2nd to 3000 rpms, just so when I shift into 3rd I'd be doing 1500.

I know the tranny will bolt up, the bolt pattern's the same. Im not sure about the rest. Since the 5 speed is longer than the 4 speed, you'd need to have your drive shaft cut shorter, and maybe drill new holes in the cross member for the tranny mount. Before I put the 4 speed in I had a C6 (I kept it for a rainy day), and the C6 is 3" longer, so I had to find a longer driveshaft. Getting a drive shaft shortend is much cheaper than getting one lengthend, which is good news.
 
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Old Feb 18, 2006 | 12:52 PM
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cutting the drive shaft shorter is no problem. because i got to do something the tranny got stuck between third and netrual. the spacers in there came loose and jammed the selector gear. thanks for your help.
 
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