Hi All,
I've got a '95 F-350 with 275K miles on it. When I bought the truck about 5 years ago, the PO told me it had a recent transmission rebuild and a shift kit but he didn't know which one. And overall the trans feels very strong. At that time it was shifting VERY hard ... like throw your back out hard. After a lot of troubleshooting it ended up being the barometric pressure sensor. Replaced that and it's been great for the most part.
Last summer I bought a fairly heavy 5th wheel trailer so did a bunch of stuff to get the truck up to speed, one of which was to put in an intercooler. At that time we didn't feel like the intercooler and the 2 trans coolers by the radiator would all fit, so we removed those coolers and put in a remote frame mounted Derale cooler. Also put in a Mag-Hytec deep pan. With the pan and the remote mounted cooler, it has a LOT of fluid.
Since then, the trans has been running pretty hot. It will settle in at 200 or so unloaded just running around down as my daily driver and 225 when towing through the mountains. Last trip it started throwing a P1728 when it gets hot.
Things I have tried:
Questions / Next Steps
I read somewhere that there is a theory that the deep pans are a bad thing in that the fluid takes longer to get hot, but once it does, the cooler just can't keep up. If this is the case, should I go back to the stock pan? Add more cooling? I want to change the fluid anyway since it's been running so hot so changing the pan would be pretty easy to see if that helps.
I'm also wondering about the torque converter. I don't know if it was replaced when they rebuilt the trans and I know these can be a weak point. Long term I'd like to put a built trans like a BTS or JW in. But that's a lot of $ so I'd like to put it off as long as I can. Wondering if replacing the TC with a better one (like the one from Precision Industries for example) would make sense? Maybe do a valve body at the same time so I know what it is?
Any other suggestions appreciated.
I've got a '95 F-350 with 275K miles on it. When I bought the truck about 5 years ago, the PO told me it had a recent transmission rebuild and a shift kit but he didn't know which one. And overall the trans feels very strong. At that time it was shifting VERY hard ... like throw your back out hard. After a lot of troubleshooting it ended up being the barometric pressure sensor. Replaced that and it's been great for the most part.
Last summer I bought a fairly heavy 5th wheel trailer so did a bunch of stuff to get the truck up to speed, one of which was to put in an intercooler. At that time we didn't feel like the intercooler and the 2 trans coolers by the radiator would all fit, so we removed those coolers and put in a remote frame mounted Derale cooler. Also put in a Mag-Hytec deep pan. With the pan and the remote mounted cooler, it has a LOT of fluid.
Since then, the trans has been running pretty hot. It will settle in at 200 or so unloaded just running around down as my daily driver and 225 when towing through the mountains. Last trip it started throwing a P1728 when it gets hot.
Things I have tried:
- The Derale cooler was set up to pull air from above the cooler vs. push it through. I reversed the polarity to switch it to pushing through. This made no difference.
- The cooler has a thermostat that turns on the fan at 180*. I bypassed this on my last trip towing to just have the fan always run when the ignition is on. This made no difference either.
Questions / Next Steps
I read somewhere that there is a theory that the deep pans are a bad thing in that the fluid takes longer to get hot, but once it does, the cooler just can't keep up. If this is the case, should I go back to the stock pan? Add more cooling? I want to change the fluid anyway since it's been running so hot so changing the pan would be pretty easy to see if that helps.
I'm also wondering about the torque converter. I don't know if it was replaced when they rebuilt the trans and I know these can be a weak point. Long term I'd like to put a built trans like a BTS or JW in. But that's a lot of $ so I'd like to put it off as long as I can. Wondering if replacing the TC with a better one (like the one from Precision Industries for example) would make sense? Maybe do a valve body at the same time so I know what it is?
Any other suggestions appreciated.