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Old 09-08-2012, 11:47 PM   #1
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Ford 4r100 transmission

Have a 2000 ford excursion 4x4 with a v10 triton engine and standard automatic transmission (ford 4r100) the vehicle has over 175k miles I have the transmission serviced new filter and fluid every 25 k miles. I pull a travel trailer many highway miles over mountains and valleys in the southwestern US. It appears to be working fine... How long can these transmissions last? I'm planning a long trip this summer and want to know what other people are getting out of these transmissions. Thanks for the information.....
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Old 09-09-2012, 09:30 AM   #2
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My truck- 2001 Ford F250 Powerstroke- lost its original trans at 242k miles. I purchased the truck used with 201k miles, so I am not sure if or when the trans was serviced. I did service it 3 times after I purchase because the fluid looked good and had no burnt smell to it. Do you a transmission gauge? You can make it last much longer if you monitor it when towing never allowing it to get over 210 degrees.
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Old 09-09-2012, 09:45 AM   #3
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Quote:
Originally Posted by noslofivoh
My truck- 2001 Ford F250 Powerstroke- lost its original trans at 242k miles. I purchased the truck used with 201k miles, so I am not sure if or when the trans was serviced. I did service it 3 times after I purchase because the fluid looked good and had no burnt smell to it. Do you a transmission gauge? You can make it last much longer if you monitor it when towing never allowing it to get over 210 degrees.
I don't have a transmission gage.... Don't all vehicles with tow packages have oversized transmission coolers factory installed?
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Old 09-09-2012, 05:33 PM   #4
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With proper oil changes, filter changes, and synthetic oils, the 4r100 can last a long time. It helps to have an auxiliary transmission cooler for towing. The stock tranny cooler on the 4R100 is woefully inadequate for HD use.

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Old 09-09-2012, 05:38 PM   #5
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Tru Cool Max 4739 is a good cooler to use. When installing, don't bypass the radiator!
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Old 09-12-2012, 08:14 PM   #6
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Quote:
Originally Posted by Max Freedom View Post
I don't have a transmission gage....
Then I'm surprised your 4R100 is still in one piece if you tow more than a rowboat.

Heat is the tranny killer. When towing with your stock tranny cooler setup, you can easily overheat the tranny under extreme conditions. Such as towing up a slow mountain pass at less than 40 MPH. Backing a trailer up a grade. Even stop-and-go traffic through a big city, especially if you get in a traffic jam where you are more stopped than go.

You need a good tranny temp gauge with the sender installed in the pressure port on the driver's side of the tranny. Then if you ever see over 210, you need more tranny cooling. Don't allow more than 225 tranny temp if you're not ready to buy a rebuilt tranny yet.

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Don't all vehicles with tow packages have oversized transmission coolers factory installed?
Your 2000 X-Car with V-10 engine has a bigger than normal oil-to-air (OTA) tranny cooler, but it's not big enough for towing in extreme conditions. I don't know about the V-10, but for the 2000 diesels Ford added an oil-to-water (OTW) tranny cooler beginning with February 2000 production. If your X has that OTW cooler in addition to the V-10 OTA cooler, then you may never see over 210 tranny temp. But if you don't have the OTW cooler you need to watch the tranny temp closely when towing, especially when when towing at less than highway speeds. If you ever see over 210, then order a new OTW tranny cooler for a 6.0L diesel. About $300 from www.Tousleyfordparts.com. It's a bolt on mod that will solve your tranny cooling problems. DO NOT buy a used OTA tranny cooler from anybody - it may sound like a bargain compared to $300 for a new one, but it will probably trash your tranny.
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Old 09-21-2012, 07:48 PM   #7
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The V10 has a bigger cooler than the 7.3s, so you're doing ok. A 6.0 trans cooler is a direct bolt in.
I would also get a valve body; firms up shifts reducing wear and heat.
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