Modern Rebuilt Trans for Towing

I am of the school, "if it is not broke don't fix it !"

The best thing you can do is use a transmission cooler and change the fluid every 50K miles. I recommend using what the factory used.

theoldwizard1 wrote:
I am of the school, "if it is not broke don't fix it !"

The best thing you can do is use a transmission cooler and change the fluid every 50K miles. I recommend using what the factory used.

Replace the factory cooler with the unit from the 6.0's Torqueshift. Cool as a cucumber.

A lot of 4R100 transmissions last 12-140 k miles. Some are going 200k miles. I am at 175k miles. I am trying to update my truck so I don't go out and spend 40,000 dollars for a newer one.

If you decide on a replacement, Ford’s HD4R100 is a good one which comes with warranty. In 2001 or 2002 I went to Lead Hill, Arkansas in my F-250 Powerstroke and had Brian’s Truck Shop (BTS) rebuild my 4R100. Leaving there towing a 7;000# TT the sharp, crisp shifts were immediately noticeable. To this day, it is just as responsive.

Yes, definitely upgrade ypur transmission cooling and add a transmission temperature gauge.

Are you swapping it out just to upgrade or are you swapping it out because the original is toast.

I had 2 7.3's great trucks but transmission was the weak link.
I replaced trannies in both of them.
10-12 years ago I may have considered upgrading the tranny. But now I would not swap trannies just to upgrade.
If I were going to upgrade I would swap the entire truck for something newer.
If the current trans. is working leave well enough alone.
If the current trans fails consider an upgrade BD but give lots of consideration to a newer truck.
As great as the 7.3 was, it is getting to be a lot of old technology by today's standards.

Lantley wrote:
Are you swapping it out just to upgrade or are you swapping it out because the original is toast.

I had 2 7.3's great trucks but transmission was the weak link.
I replaced trannies in both of them.
10-12 years ago I may have considered upgrading the tranny. But now I would not swap trannies just to upgrade.
If I were going to upgrade I would swap the entire truck for something newer.
If the current trans. is working leave well enough alone.
If the current trans fails consider an upgrade BD but give lots of consideration to a newer truck.
As great as the 7.3 was, it is getting to be a lot of old technology by today's standards.

Son did the ungraded trans on a 7.3 still towing strong. Like Lantley said they are old tech the 6.0 pulled a lot stronger than the 7.3. The 6.7 is stronger yet and the reports on the "new" 6.7 are it's better yet with the 10sp auto.