How strong is the 4R100 in stock form?

John in OkieLand said:

greenskeeper -- Recently bought 1997 F350

Said:
If you want it to last, keep it stock. Any chip will kill the E4OD transmission unless upgraded (assuming it's an automatic?)


I'm curious if the same Caveat is true for the '02 4R100 in the Excursions?

I bought the PHP Hydra, but have not got it installed.
My only interest is as a Daily Driver, with just a bit more MPG, and some extra oomph uphill while towing my 9,000 lb RV

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The biggest killer of the E4OD and 4R100 is the way undersized transmission coolers. E4OD is even significantly smaller than the 4R100. The E4OD also only had a single disk converter. It wasn't until the later years of the 4R they went to a multi-disk.

A good tune will add line pressure to help hold the clutches better from slipping, causing heat.

Having a gauge or monitor is best when adding a tuner so you can keep an eye on your transmission temps.


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John in OkieLand said:

Okay,
got the upgraded cooler ordered,
am I going to have to remove this front Grill bumper / winch to install it?

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You will have to drop the factory crash bar to reach the lines going up into the core support area. As for your bumper, that just depends on how much it covers underneath. I also highly suggest that you bypass the radiator if it is hooked up to it. My son's new transmission failed due to the cavity in the radiator let loose where the transmission lines go and filled the trans with antifreeze. It wiped out everything including the converter.

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