Mileage for tranny

[onecrazyblackredenck]

What is the typical mileage for a 7.3 automatic tranny. What are symptoms of weak tranny? How to prevent? I run lucas in it right now. Can someone explain slipage?

[bigcountrysg]

Originally Posted by onecrazyblackredenck

What is the typical mileage for a 7.3 automatic tranny. What are symptoms of weak tranny? How to prevent? I run lucas in it right now. Can someone explain slipage?

Slippage is when the clutches in the tranny can not hold the power being given to the tranny. Usually when this happens your tranny feels sluggish. Also it can be when the clutch plates in the Torq Converter can no longer hold the power any more either. This will give you slow throttle response, when a clutch internally goes out usually when the tranny shifts into that gear the rpms go up and you go no where. Typical problems is the Torq converter starts wearing out and then it contaminates the fluid or burns the fluid up which then damages the rest of the tranny.

Typical mileage well lets see my oem tranny went out at 5,000 miles, the new tranny went out at 80,000 then I had that one go out at about 120,000 miles and I just had it rebuilt this time with all suncoast products and triple disc torqconverter at 136,000 so now I should be good for a long time. I would say if you maintain the tranny always doing the fluid changes and flushes at the 30,000 intervals you should be good for a long time. But I typically hear of tranny problems in these trucks around the 100,000 mile mark.

5,000 mile the tranny went out I was pulling way to much wieght up hill ended up bruning up the torq converter. Ford replaced the tranny with a brand new one.

80,000 mile, something happen to the pump and the throttle body, Ford replaced the pump and throttle body that lasted until 120,000 miles.

120,000 mile tranny went completely out, I replaced it with a tranny from the parts yard by my house with one that came out of a truck that had around 30,000 supposedly. That tranny lasted until 136,000

136,000 miles I had the tranny rebuilt by AAMCO with the upgrades.

So a tranny being man made and mechanical could fail at any time.

[MrJohnWayne]

I've got 190,000 on the stock tranny in my F250 work truck. Don't know about the average miles people see though.

[Mikes7.3]

Originally Posted by bigcountrysg

Slippage is when the clutches in the tranny can not hold the power being given to the tranny. Usually when this happens your tranny feels sluggish. Also it can be when the clutch plates in the Torq Converter can no longer hold the power any more either. This will give you slow throttle response, when a clutch internally goes out usually when the tranny shifts into that gear the rpms go up and you go no where. Typical problems is the Torq converter starts wearing out and then it contaminates the fluid or burns the fluid up which then damages the rest of the tranny.

Typical mileage well lets see my oem tranny went out at 5,000 miles, the new tranny went out at 80,000 then I had that one go out at about 120,000 miles and I just had it rebuilt this time with all suncoast products and triple disc torqconverter at 136,000 so now I should be good for a long time. I would say if you maintain the tranny always doing the fluid changes and flushes at the 30,000 intervals you should be good for a long time. But I typically hear of tranny problems in these trucks around the 100,000 mile mark.

5,000 mile the tranny went out I was pulling way to much wieght up hill ended up bruning up the torq converter. Ford replaced the tranny with a brand new one.

80,000 mile, something happen to the pump and the throttle body, Ford replaced the pump and throttle body that lasted until 120,000 miles.

120,000 mile tranny went completely out, I replaced it with a tranny from the parts yard by my house with one that came out of a truck that had around 30,000 supposedly. That tranny lasted until 136,000

136,000 miles I had the tranny rebuilt by AAMCO with the upgrades.

So a tranny being man made and mechanical could fail at any time.

Sounds like my story! I've had mine out 5x's. 4 rebuilds and 1 front seal. So maybe you got a good one and maybe you didn't only time will tell. Service it every 15,000 miles like your life depends on it and if or when it goes out spend the money and have it rebuilt by Suncoast or Brians Truck Stop or John Woods or somebody who can build you a 400hp+ Trans you'll be money ahead in the long run.

[CUMMINS_KILLA99]

i have 125000 on my all stock tranny. i have the ts chip on my truck and i pull a goose neck trailer all the time no problems here. good matainece and a tranny temp guage will get you the most life out of your tranny.

[Mikes7.3]

Originally Posted by CUMMINS_KILLA99

i have 125000 on my all stock tranny. i have the ts chip on my truck and i pull a goose neck trailer all the time no problems here. good matainece and a tranny temp guage will get you the most life out of your tranny.

There you go! Some trucks have good ones and some don't. Mine fell in the latter.

[WD40]

1250000. WOW that is some miles. I bet you just got one to many 0's right. LOL. (onecrazyblackredencks ) I can't add anything to what the others have said. It all bolls down to severe and how you treat it. Keep it cool and change the oil, and it will love you.

[Mikes7.3]

I never towed anything more than a u-cart concrete trailer. Mostly freeway miles and I'm a fanatic about maintenance. I never had to service it because I couldn't get 20k out of it before it WOULD GO OUT.LOL
The first time it only had 1000 miles on it off the lot brand new. Ford put a reman in it because the only new trans (never used) are in Detroit so I had a new truck with a reman trans go figure.

[CUMMINS_KILLA99]

never had a problem yet but when it goes out ill definatly upgrade but why fix something if it aint broke. they either last a while or they go out quick

[chopstx667]

I'm at 110k on the stock tranny but serviced it according to the time tables. I don't feel any sluggishness or slippage of course I wouldn't know what it would feel like though hehe. I also run Hypertech III on stage 3 all the time but don't race it much...or try not too.