7.3 update

True but pretty darn sure it wouldn't already have 900k miles on it.

 

Dand that's good. How many transmissions did you wear out? Place I used to work had a 96 F350 with a 7.3. Thing was a beast. But it had around 300k and the transmission flew apart. Certainly no shame for it considering it was always overloaded.

Probably one of the best engines ever built

 

What caused the original engine to come out at 586k?

 

Not a bad run still at nearly 600k.

mine only has about 350k on it and I’ve left the injectors and tuning stock. (I had it tuned for awhile but put the stock PCM back in.) burns about a quart every 3000-3500 miles no matter what brand or weight of oil but it’s done that since I bought it at 140k so it must just have looser tolerances. Right now I’ve got Amsoil signature series 15W40 in it since I know a dealer and get good pricing. At some point I’ll probably take it to the injector guy in Chardon, OH and let him fix me up.

 

the ZF6 manual was the way to go on these old ones. Fairly stout setup with the right clutch and flywheel. Guys spend 5k on fancy builds on those old 4 speed autos just so they’ll do what the ZF6 can with some clutch work. Bigger 6.0 oil cooler is the best bang for the buck mod to a stock automatic though.

 

Have a 96 F250 , shed kept . Will outlast me NA 7.3

 

Oh yeah a Mag-Hytec tranny pan is a good upgrade too. Increases the oil capacity and cools it off better with the finned aluminum.

If you’re having to turn the A/C off to keep the engine from getting too hot your rad might be getting time for replacement. Feel around for cold spots on it when you pull into a rest area. What kind of oil temps are you seeing when pulling up a hill?