No trans fluid change... Ever? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 33 (permalink) Old 03-31-2015, 09:26 AM Thread Starter
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No trans fluid change... Ever?

Just bought my truck about a month ago. Guy said he has never changed the fluid in the trans, not even touched it. I've heard from quite a few people that if I put new fluid in there then it will wash out all of the shavings and what not and I will probably have issues. What do you think? Change it or leave it?


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post #2 of 33 (permalink) Old 03-31-2015, 01:19 PM
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Re: No trans fluid change... Ever?

How many miles on it?
Did he ever change the external filter?

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post #3 of 33 (permalink) Old 03-31-2015, 07:20 PM
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Re: No trans fluid change... Ever?

If the trans is in good shape new fluid can only help it. If the trans is about to die new fluid won't save it. If it were mine I'd change the fluid.

Mark
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post #4 of 33 (permalink) Old 04-01-2015, 05:27 AM Thread Starter
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Re: No trans fluid change... Ever?

It has 240,000 miles on it. I'm the third owner. Carfax showed first owner serviced everything religiously and he owned it for the first 100k. The second owner claims to never have touched the trans. Where is the external filter located?


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post #5 of 33 (permalink) Old 04-01-2015, 05:30 AM Thread Starter
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Re: No trans fluid change... Ever?

Quote:
Originally Posted by Mark Kovalsky View Post
If the trans is in good shape new fluid can only help it. If the trans is about to die new fluid won't save it. If it were mine I'd change the fluid.

I read you're sticky about the trans flush. I'm not sure I agree with what you're saying though. I am no expert by any means but it seems to me that if the trans is running great then adding new detergent to it will wash out all of the shavings and what not that have collected. I know the new fluid won't hurt it, but what the new fluid does might. That's what makes me nervous.



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post #6 of 33 (permalink) Old 04-01-2015, 08:44 AM
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Re: No trans fluid change... Ever?

The external filter is on the passenger side - up near the front bumper.

It requires a 22mm socket and it is best to use an impact wrench to remove the filter housing (it is not secured very well and a ratchet will potentially bend things).

The filters from Ford are expensive. Get one from DieselFiltersOnLine.com.

I would remove the filter (change it) and see what the old one looks like.

The internal filter is not one that needs changing.

FYI - you can change the fluid easily since the pan has a drain plug. However, there is so much fluid that is retained after you drain the pan, you still have slightly less than 50% new fluid with a single drain/re-fill operation.

I think a series of drain and fill operations (along with the filter change) would be advisable. After the first drain and fill, drive it a few hundred miles and do another drain and fill. I would even do it a third time. Not cheap, but better than a flush IMO.

I would use Mercon SP or LV fluid only.

Mark
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post #7 of 33 (permalink) Old 04-01-2015, 02:43 PM
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Re: No trans fluid change... Ever?

I bought my powerstroke with 187k then out of curiosity on the wear of the trans @300k miles I dropped the pan to check for metal fines....found very little, I did a 5 gallon flush...truck is now at 355k

1996 F350 Crewcab lb 2wd auto, tommylift, now over 451k, 355k 3/31/15

1991 F250 Xtracab lb 2wd auto, sold again! Driveline and chassis is under a '65 F350 cab

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post #8 of 33 (permalink) Old 04-01-2015, 04:01 PM
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Re: No trans fluid change... Ever?

Quote:
Originally Posted by MattHatchett View Post
I read you're sticky about the trans flush.
That does not apply to this transmission. It will not work on a 5R110 TorqShift transmission.

Quote:
Originally Posted by MattHatchett View Post
I'm not sure I agree with what you're saying though. I am no expert by any means but it seems to me that if the trans is running great then adding new detergent to it will wash out all of the shavings and what not that have collected.
You say you're not an expert. I am an expert. You just spouted internet myth nonsense. But if you believe that, don't change your fluid. I won't be the one paying for your new trans.

Quote:
Originally Posted by MattHatchett View Post
I know the new fluid won't hurt it, but what the new fluid does might.
Speaking of nonsense, what does that sentence mean? New fluid won't hurt it, but new fluid might hurt it?!?!?!?

Mark
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post #9 of 33 (permalink) Old 04-01-2015, 05:09 PM
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Re: No trans fluid change... Ever?

Quote:
I think a series of drain and fill operations (along with the filter change) would be advisable. After the first drain and fill, drive it a few hundred miles and do another drain and fill. I would even do it a third time. Not cheap, but better than a flush IMO.
Why is it better ? a flush replaces all the fluid with new fluid in one shot vs new fluid mixing with dirty fluid three times

no voodoo , backflush , chemicals just old out new in via the flush machine that preheats the new oil so the t stat stays open

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post #10 of 33 (permalink) Old 04-01-2015, 07:04 PM Thread Starter
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Re: No trans fluid change... Ever?

Quote:
Originally Posted by Mark Kovalsky View Post
Speaking of nonsense, what does that sentence mean? New fluid won't hurt it, but new fluid might hurt it?!?!?!?

I was saying what the new fluid DOES will hurt it. I understand you're an expert but this is not an Internet myth. I know a few people who will back me on this. If the fluid hasn't been changed, then all of the buildup/shavings/whatever that has gathered there is kind of keeping everything in sync. Wash all of that away and problems can occur.


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