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5r55 E, n,s,w ?


Mickey Bitsko

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Are the bell housing bolt patterns and input shaft the same on all 5r55 transmissions for use with the 4.0 ohv ?
 


exbass94

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Well the 4.0 OHV has always had the same bolt pattern, so if the transmission was originally behind a 4.0, then yes, they're the same bolt pattern.

The 5r55S, W, and N though, while they have very similar names, are entirely different internally than the 5r55E used in Rangers. They probably have different gear ratios, different sensors, dimensions, etc. Some of these were used behind V8s which have different bell housing patterns. I don't know about the input shaft.

Basically I wouldn't bother even looking at the N,S, or W transmissions. Look for a 5R55E out of a Ranger or Explorer.
 

Mickey Bitsko

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Thank you for your reply, the 5r55E I'm currently running is fine[170k]. I'm going to have a "power flush" by a very reputable transmission shop monday, when I called and talked to the owner of the shop [30years experience] , he did not recommend the heavy of a flush on a high mileage 5r55e, he recommended a std.pan filter type maintenance , I asked him if maybe a freshen up kind of rebuild in the future ie; VB, transgo, etc, he said these transmission are pretty weak and if I wanted a little more hd transmission I should consider a manual...well..I like automatics.. hence the question.
There are quite a few members on this forum that agree with this reasoning, I've never been one to go with flow, but may need to take a new position.

One more note, I have read you CAN build a 5r55e pretty strong with a lot money which I don't have and won't have,
More input would be appreciated, thanks again
 
exbass94

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I wouldn't be afraid of a flush. I highly doubt it's a "power" flush. Most flush machines just hook up to the cooler lines and let the transmission's own pump pump the old fluid out, while the machine simultaneously pumps fresh fluid in. When people hear the word "flush," they seem to envision power washing the inside of the trans or something, and that is simply not what happens. I've HEARD of machines that supposedly force fluid through the trans at a high pressure, but I've searched, and I've NEVER actually seen one, and I doubt that such a thing even exists. More likely, someone just THINKS that's what it does.

See my post in this thread: http://therangerstation.com/forums/showthread.php?t=74839
No need for me to type that all over again.
 

Mickey Bitsko

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Very good post exbass94, I'm not sure of the procedure of the shop i'm using but I'll let you know next week,preventative maintenance has always been a pet peeve. I'll stay with the 5r till it quits and then worry about it.



edit:to clear things up , the owner didn't mean don't do a complete flush on all hi mile tranny's,[ just the one's as you stated] no previous maintenance . My last pan drop filter change was 10-12k, I now think it should be fine.

Thanks again for enlightenment.
 
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adsm08

adsm08

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I tend to disagree with the idea that you shouldn't flush a high-mile trans that has not been kept up with.

That's like saying "well, I'm late for changing my oil, might as well never do it".

I flushed the trans on my sister's first car at 150K miles. It had never been serviced before. Three years later and over 50K miles (she was driving from Harrisburg PA to Nashville TN a few times a year) it was still going strong when a water main broke under the car.


If a transmission fails shortly after a flush it probably already had an issue that was about to present itself, or was being chalked up to sticking valves and dirty fluid. Then the fluid get changed, the symptom doesn't improve, and now the owner says the flush broke the trans. Then the myth gets repeated over and over.
 

Mickey Bitsko

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Well it sure makes sense ,when you think about it ,anything mechanical should get maintenance.
 
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