DIY transmission service: do's and don'ts ? - Ford Powerstroke Diesel Forum
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Old 06-26-2013, 10:49 AM
579 579 is offline
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DIY transmission service: do's and don'ts ?

I just did a vehicle history repot on my 97 f350 cc 4x4.

It was a free one I found online. It's never had a tranny service and my truck currently has 238k miles on it. I've only had the truck a month and so far so good but it's my daily driver and I want to ensure it stays that way.

I want to change the filter but I'm reluctant to do a flush . I found this while searching

Changing ATF: 7.3L PowerStroke Engine and 4R100 Automatic Transmission. - Diesel Forum - TheDieselStop.com

I just wonder : should just drop the pan, change filter, and replace fluid?

Or should I do the whole flushing procedure ?

I am aware of the hear say involving new tranny fluid washing old clutches out and causing failure. In y'all's experiences how true is this ?


Also do,I need to drill and tap a fitting in the pan for a temp gauge ? I will add one later but not right away.

Thanks
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Old 06-26-2013, 11:04 AM
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That flushing article was written by Mark Kovalski, a former Ford auto trans engineer (and a regular, and very valuable, poster on various PSD forums in auto trans related posts). I don't think I would have any hesitation with doing that, but that just my opinion. Cheers!
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Old 06-26-2013, 02:53 PM
579 579 is offline
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I would trust it as well. Without a doubt.

Thank you for responding .

but I'm worried about bringing all that new detergent in contact with all my 16 year old internal transmission components .... Just planning ahead . I don't want transmission woes again . Just had that. It sucks so bad .
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Old 06-26-2013, 02:58 PM
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"Also do,I need to drill and tap a fitting in the pan for a temp gauge ? I will add one later but not right away."

no tapping required there is a plug on the driver side, right above the pan.
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Old 06-26-2013, 05:15 PM
579 579 is offline
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Awesome . Thanks ! That's good to know!
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Old 06-26-2013, 06:17 PM
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The issue with flushing is when the lube shops do a chemical flush. That can loosen stuff up and cause damage. That reminds me I got 35k on my trans and have not serviced it.
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Old 06-27-2013, 02:57 AM
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How sure are you of the miles on the trans?? Those reports aren't necessarily 100% accurate.

If its does not have an issue now, personally i wouldn't flush. This is what i would do...

Buy this pan(holds more fluid and has a drain plug... http://www.summitracing.com/search/i...material/steel

Then drop the pan and let trans drain, remove TC inspection cover and drain converter. Purchase a GOOD dex3 AFT (synthetic preferably), a new filter, and an after market cooler.

Like this one...
Amazon.com: Tru-Cool Max LPD47391 47391 Low Pressure Drop Transmission Oil Cooler: Automotive Amazon.com: Tru-Cool Max LPD47391 47391 Low Pressure Drop Transmission Oil Cooler: Automotive

I would then completely bypass the rad cooler all together, and remove the secondary cooler if installed, and install the unit above.

Install new filter and pan,fill converter with fluid, install fluid, drive...
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Old 06-27-2013, 04:18 AM
579 579 is offline
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"Install new filter and pan,fill converter with fluid, install fluid, drive..."

That's what I was thinking .... But if I'm already going to drain the tc then I might as well follow through with the flush.

I'm pretty sure the fluid has not been changed in a long long time....

The radiator cooler has been eliminated already and it has a aux cooler on it now. L
It looks stock. It's 11"x10" in size . Do I still need bigger?

Does that one from summit need an extension adaptor for the filter since it holds more fluid?

The description says its a stock pan

Thanks for the links and feedback
My transmission and myself thank you.
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Old 06-27-2013, 04:23 AM
579 579 is offline
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This one looks pretty radical

Derale 14208 Transmission Cooling Pan for Ford E4OD, 4R100, 5R110 and5R110W : Amazon.com : Automotive Derale 14208 Transmission Cooling Pan for Ford E4OD, 4R100, 5R110 and5R110W : Amazon.com : Automotive
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Old 06-27-2013, 04:03 PM
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Quote:
Originally Posted by 579 View Post
"Install new filter and pan,fill converter with fluid, install fluid, drive..."

That's what I was thinking .... But if I'm already going to drain the tc then I might as well follow through with the flush.

I'm pretty sure the fluid has not been changed in a long long time....

The radiator cooler has been eliminated already and it has a aux cooler on it now. L
It looks stock. It's 11"x10" in size . Do I still need bigger?

Does that one from summit need an extension adaptor for the filter since it holds more fluid?

The description says its a stock pan

Thanks for the links and feedback
My transmission and myself thank you.
The only reason I would say no flush is because its never been done to your knowledge. It may end up loosening up a bunch of crud that could get stuck in the vb or shift solenoid and do more harm than good.

The sell a deep filter, that is the one you want.

As far as the cooler goes I see it this way. Heat is what kills a transmission, so the cooler the better, the more miles you will get out of it. I run a 36 row 6.0 cooler on mine bc I tow a lot with it. My mini is a 5ton machine, I rarely see anything near 130 when pulling it.

Sent from AutoGuide.com App
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