4r55e/5r55e question - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 10-07-2010
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4r55e/5r55e question

Ok, since the 4r55e and the 5r55e is very mechanically similiar, can the valve body and pcm for a 97 be swapped into a 95 and it function as a 5r55e?
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Old 10-10-2010
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the 4r is a four speed auto trans and the 5r is a five speed auto trans. plus i believe the 95 is obd1 and the 97 is obd2. if this is correct then it will not work for sure. your best bet is to go to your local trans shop and ask them for guidance.
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Old 10-10-2010
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Mechanically they are almost identical. 1st gear gets overdriven and becomes "2" gear, and 2 becomes 3rd, etc. 95 is EEC-V and has the obd II data link connector. I can datastream and everything else like the 96 and later. So, it's a bit of a bastard child PCM. Local trans shops would be useless for any type of conversion like this.
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Old 10-10-2010
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Let me see if I can get you eec pinouts for this. I have 95 and 96 to reference, i know the electronic controls for the trans changed in 98. So it sounds possible, but this half breed computer may have hidden gremlins.
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Old 10-10-2010
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I can get you pdf's of these if you want some that looks a bit cleaner.



95



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96


Name:  9640eecpin1.jpg
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Old 10-11-2010
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Awesome, thanks. These should help.
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Old 10-11-2010
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Was it 97 when the 5R55E came out or 96?
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Old 10-11-2010
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97

Quote:
# 1997 Ford Aerostar
# 1997–Current Ford Ranger
# 1997–Current Mazda B-Series
# 1997–Current Ford Explorer
http://en.wikipedia.org/wiki/Ford_Bo..._Transmissions


I don't have a 97 manual. 95 96 99 02 are the years I have. Changes happened in 98 and 01 so the info should be good but, YMMV.
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Old 10-11-2010
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Thanks.
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Old 10-12-2010
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As compared to the 95/96 4R, the 1997 5R adds an Output Shaft Speed sensor and an Overdrive Drum Speed sensor; both mount through holes in the trans case. The 5R also uses a completely different Transmission Range Sensor and matching engine/trans harness. There may be more.

The extra "1st OD" gear only functions during heavy throttle acceleration. The transmission controls skip it any other time. So, potentially slightly better acceleration but no impact on fuel economy. Even if it were possible to swap parts to create a 5R, would that be worth it?

Last edited by V8 Level II; 10-12-2010 at 05:17 AM.
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Old 10-12-2010
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Yeah, the whole tranny thing may not be worth is but at least getting the 96 PCM with the full obd II may be worth it.
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Old 10-12-2010
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Not much functional difference there, IMO. Maybe high data rate misfire detection or maybe a couple more active monitors in 96 - not sure what the specific Ranger breakdown was for the 95 OBDII phase in.
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Old 10-12-2010
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OBD II will allow programmers and such for the 96. There's virtually nothing available for the 95.
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