Transmission Help - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 18 (permalink) Old 07-23-2009, 05:48 PM Thread Starter
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Transmission Help

i have a 97 PSD w/ a little over 138,000 miles. i was going to get the tranny serviced but when talking to the guy on the phone he said i would be better off getting the tranny flushed along with a new filter. next he recommended a transmission place and then he said the place may not even want to do that to my transmission because of the mileage on it. could you explain why he told me this, and also what would be suggested. i am the second owner of the truck (i got it about a month ago) , i am not sure if the tranny has ever been flushed and got a new filter.

1997 F-350 7.3 POWER STROKE. XLT, 4X4, BLACK, REG CAB, STRAIGHT PIPED, DIAMOND PLATE TOOL BOX AND BED RAILS
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post #2 of 18 (permalink) Old 07-23-2009, 06:39 PM
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Re: Transmission Help

I would never power flush a trans..just drop the pan, change filter and refill with fluid. Do it every 20k miles+-

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post #3 of 18 (permalink) Old 07-24-2009, 08:05 PM
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Re: Transmission Help

Way too many old wives out there that believe the trans flush or even a filter change will hurt a trans if it has never had any service done to it.

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post #4 of 18 (permalink) Old 07-24-2009, 08:12 PM
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Re: Transmission Help

As a tranmission tech, I agree trans flushes are for dealership suckers.
The reason he recommended not flushing it, is because if a trans is left for that kind of mileage, the worn 'gunk' clutch material can build up in corners and crevases internaly. When a flush is done, it loosens all this material (which builds up as internal components slowly wear) into the mainstream flow, and has been known to cause blockages in the vavle body, the accumulators, lines, etc.
The best bet, especially if you don't know the service history, is to drop the pan, replace the filter, and refill. Simple is usually best.

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post #5 of 18 (permalink) Old 07-24-2009, 11:28 PM Thread Starter
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Re: Transmission Help

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Originally Posted by dennisr_f350 View Post
As a tranmission tech, I agree trans flushes are for dealership suckers.
The reason he recommended not flushing it, is because if a trans is left for that kind of mileage, the worn 'gunk' clutch material can build up in corners and crevases internaly. When a flush is done, it loosens all this material (which builds up as internal components slowly wear) into the mainstream flow, and has been known to cause blockages in the vavle body, the accumulators, lines, etc.
The best bet, especially if you don't know the service history, is to drop the pan, replace the filter, and refill. Simple is usually best.
ok thanks a lot. any recommendations on what filter or fluid to use?

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post #6 of 18 (permalink) Old 07-25-2009, 12:50 AM
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Re: Transmission Help

You can get the filter at your favorite parts joint. Fliud is any Mercon or Mercon V rated fluid.

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post #7 of 18 (permalink) Old 07-25-2009, 12:52 AM Thread Starter
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Re: Transmission Help

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Originally Posted by trackspeeder View Post
You can get the filter at your favorite parts joint. Fliud is any Mercon or Mercon V rated fluid.
ok thanks

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post #8 of 18 (permalink) Old 07-25-2009, 03:32 AM
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Re: Transmission Help

We do about 10 trans flushes a week in my shop with a T Tech 500, I have been doing it for years and never had a problem. I think some people wait till they feel something wrong with the trans, then think it is time for a flush, but its to late so if they have it done and the trans goes bad they blame it on the flush. That is why we the bad stories about servicing a high mileage trans. All oil breaks down, If you change your engine oil every 5000 miles in 100,000 miles you have changed it how many times - 20 , how many times have you done the trans? most people never. I have a 89 F250 with the original E4OD ( even the first months production ) all I have done is change the trans fluid about every 40,000, and it has 289,000 . All I'm saying is a little maintenance can go a long long way.

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post #9 of 18 (permalink) Old 07-25-2009, 06:17 AM
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Re: Transmission Help

Drain the conv also. Everyone blows off the trans. It's true that proper maint can make them live a long time. Would you think about running your engine oil 15-20K miles. Same goes for the diff.

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post #10 of 18 (permalink) Old 07-25-2009, 07:59 AM
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Re: Transmission Help

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Originally Posted by tbolt View Post
Drain the conv also. Everyone blows off the trans. It's true that proper maint can make them live a long time. Would you think about running your engine oil 15-20K miles. Same goes for the diff.
My 01 was probably the last year they had a drain plug in the TC.

01 Excursion 7.3L Powerstroke. Gauges with AIH Delete, AIS, CCV Mod, 4' MBRP, BTS Trans, 6.0L Trans Cooler and Intercooler, DP-Tuner F5 chip, ITP In Tank Mod and Boost Annihilator, Diesel Innovation's Regulated Fuel kit, BTS Big Oil system, GTP38R Turbo with 1.15 A/R housing and BPD Stage II AC injectors. Bilstein Shocks with U front and A Rear.
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