Tow Light flashing
Logistics Pro
Joined: Nov 2010
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I had a transmission shop scan mine, got codes my reader didn't catch. They were all transfer case codes though.
Ford might be able to do it quick, or a local transmission shop will probably do it for free or maybe a coffee
Ford might be able to do it quick, or a local transmission shop will probably do it for free or maybe a coffee
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Much more info in the Tech folder but this is about temps:
04-13-2009 | 11:53 PM
bismic
Temperatures and OBD-II info:
An aftermarket temperature gauge is highly recommended.
The "Factory" transmission temp gauge, it is a glorified "idiot" light as its response is severely dampened. The panel gage will show the temp as fully warmed up at 50 *F. Between 100-220F the needle will remain in the same position on the gauge. At 230F it will move up slightly to the middle of the normal range. At 250F it will move to Yellow. The gage moves to red at 280. This is supported on page 36 of the OBDII Theory and Operations manual. The tow/haul light will flash at 275.
I am probably being conservative, but transmission temps much over 230 are probably a little too warm for continuous service in my opinion. Similarly, I would recommend to never exceed 250 for more than a short duration - say 30 minutes. Note - this is because a measured temp of 250 actually means some areas and parts may be as high as 300 - synthetic tranny fluid should be good to 300 *F or so.
Quote
04-13-2009 | 11:53 PM
bismic
Temperatures and OBD-II info:
An aftermarket temperature gauge is highly recommended.
The "Factory" transmission temp gauge, it is a glorified "idiot" light as its response is severely dampened. The panel gage will show the temp as fully warmed up at 50 *F. Between 100-220F the needle will remain in the same position on the gauge. At 230F it will move up slightly to the middle of the normal range. At 250F it will move to Yellow. The gage moves to red at 280. This is supported on page 36 of the OBDII Theory and Operations manual. The tow/haul light will flash at 275.
I am probably being conservative, but transmission temps much over 230 are probably a little too warm for continuous service in my opinion. Similarly, I would recommend to never exceed 250 for more than a short duration - say 30 minutes. Note - this is because a measured temp of 250 actually means some areas and parts may be as high as 300 - synthetic tranny fluid should be good to 300 *F or so.
Quote
Posting Guru
Joined: Oct 2006
Posts: 1,693
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From: Francestown, NH
https://www.ford-trucks.com/forums/8...ml#post7670499
Quote:
"There are at least 50 different reasons why the tow/haul would flash. The ONLY way to know why is to have the codes read. You need to have a very specific tool to be able to read Ford transmission codes. Anywhere that will read codes free won't have this tool."
Posted by
Mark Kovalsky
Former Ford automatic transmission engineer, 1988-2007.
I guess that answers my question too
Quote:
"There are at least 50 different reasons why the tow/haul would flash. The ONLY way to know why is to have the codes read. You need to have a very specific tool to be able to read Ford transmission codes. Anywhere that will read codes free won't have this tool."
Posted by
Mark Kovalsky
Former Ford automatic transmission engineer, 1988-2007.
I guess that answers my question too
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
That is probably the last thing that I would go by. When my tranny finally went after the build that I did to my truck (I was expecting it to go out), my factory gauge showed nothing out of the ordinary and my direct clutch was burned up pretty bad (only true weak link in these trannies in my mind).
Posting Guru
Joined: Apr 2008
Posts: 2,392
Likes: 1
From: Green Lane, Pa.
That is probably the last thing that I would go by. When my tranny finally went after the build that I did to my truck (I was expecting it to go out), my factory gauge showed nothing out of the ordinary and my direct clutch was burned up pretty bad (only true weak link in these trannies in my mind).
If you ever had a TFT sensor go south you would have understood my question. When they fail they can effect the shift patterns like hanging up in third. They will also spike the temp needle along with the check gauge's coming on, but not all these symptoms will occur.
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
Nope, still on the original sensors for my truck.
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