4spd auto to 5 spd auto?? - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 06-17-2011
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Icon4 4spd auto to 5 spd auto??

as the titles states... is there any way i can do this? i have a 92 3.slow... supercab... 2 piece long drive shaft.. 4 spd auto.... 3.48 rear open diff.. at most im getting 65 out of it,,, at 70 its screaming at near 3k and its begging for another gear.... how much trouble if any to pull a 5spd auto outta newer ranger 3.slow and put it in? w drive shaft and whole nine?
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Old 06-17-2011
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the 5 speed is more computer controlled. would probably require some rewiring. would probably be easier to swap the rear gears. i run 3.27s in mine and love them on the high way. 2300 rpm at 70 mph
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Old 06-17-2011
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Wirelessly posted

I'm pretty sure you'll need a new engine harness, pcm the aluminum shaft. Just re gear it
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Old 06-18-2011
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The a4ld has overdrive and is nearly the same as the 5spd just weaker parts.

To me it sounds like you are missing 4th, esp with with a 3.48 rear gear.

FWIW, I cruise 21-2200 at 70 with 3.73's.
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Old 06-18-2011
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It doesn't sound like your even getting into 4th gear. I have a 5 speed manual and I'm only hitting 2500 cruising at 70. if i left it in 4th, which is equal to your 3rd gear (1 to 1 ratio) then I'd be running near 3000.
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Old 06-19-2011
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Late model transmissions are fully controlled by the engine computer and the 92 has mostly hydraulic controls. A swap like this would be a giant can of worms and would not solve the problem anyway. The new gear of the 5-speed is added between the earlier 1st and 2nd, not tacked on as a taller overdrive.

Judging from your avatar, your revving problem is the combination of short gears and shorter than stock tires. Something like a 3.08 ratio or larger diameter tires should get you closer to where you want to be.
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Old 06-20-2011
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^^^ my avator is my old baby shes in crushed ranger heaven i dont have a pic of the new (old) replacement for specail reasons >:)
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