5r110 keeps burning up
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3rd Gear
Joined: Sep 2024
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5r110 keeps burning up
My 5r110 started having issues shifting. Been awhile so trying to get facts straight. Ended up taking it to a tranny guy that maintained these tranny's for the City vehicles. He has gone through it 5 times and it works good for 5-10 miles, actually got 40 out of it this last time and the temp gauges goes straight to hot and tranny starts slipping while in limp mode. If I stop and cool it it will go. If not it burns all the clutch packs. Where do I start to find the problem. This has been almost 3 years. He replaced the entire insides out of another tranny same thing. I think it is electrical
Lead Driver
Joined: May 2011
Posts: 5,800
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My 5r110 started having issues shifting. Been awhile so trying to get facts straight. Ended up taking it to a tranny guy that maintained these tranny's for the City vehicles. He has gone through it 5 times and it works good for 5-10 miles, actually got 40 out of it this last time and the temp gauges goes straight to hot and tranny starts slipping while in limp mode. If I stop and cool it it will go. If not it burns all the clutch packs. Where do I start to find the problem. This has been almost 3 years. He replaced the entire insides out of another tranny same thing. I think it is electrical
Codes?
Hotshot
Joined: Jul 2013
Posts: 14,301
Likes: 2,197
Too bad no one makes an external filter for the these transmissions…
The only paper toilet one bi pass we’re always full of black gunk.. no the black gunk is through the valve body and electronics inside the trannies
if anyone knows of a kit please post.
The only paper toilet one bi pass we’re always full of black gunk.. no the black gunk is through the valve body and electronics inside the trannies
if anyone knows of a kit please post.
Fleet Mechanic
Joined: Mar 2023
Posts: 1,598
Likes: 939
For me it's to hopefully catch the debris if I ever grenade the single disc lockup clutch in the torque converter so that debris doesn't make its way back to the trans and destroy it.
https://www.dieselsite.com/dieselsit...ystemTFIK.aspx
I mounted mine outside the frame rail on the passenger side. Its the red filter with the gauge, the white filter is for the coolant.
...
Logistics Pro
Joined: Jan 2010
Posts: 4,136
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Yeah if you're having these kinds of issues then you aren't getting any cooling of your transmission fluid. It definitely doesn't sound electrical to me.
Generally speaking, whenever a transmission fails, it is standard procedure to either flush all cooling lines at minimum, or replace them. It's harder to replace the cooler if it's in the radiator so sometimes a flush is all that is possible for that.
With the 5R110, there is a bypass filter that basically doesn't do much, very little of the fluid actually passes through it so it doesn't filter very much, but if the filter on it has never been changed it's a good idea to...or do as Anton did and go for an actual filter setup.
The 5R110 was a pretty robust transmission so far as I can tell. You definitely shouldn't be eating the internals over and over.
Generally speaking, whenever a transmission fails, it is standard procedure to either flush all cooling lines at minimum, or replace them. It's harder to replace the cooler if it's in the radiator so sometimes a flush is all that is possible for that.
With the 5R110, there is a bypass filter that basically doesn't do much, very little of the fluid actually passes through it so it doesn't filter very much, but if the filter on it has never been changed it's a good idea to...or do as Anton did and go for an actual filter setup.
The 5R110 was a pretty robust transmission so far as I can tell. You definitely shouldn't be eating the internals over and over.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
The aux transmission cooler out front cannot be adequately flushed. If it isn't replaced when the trans is rebuilt or replaced you are almost guaranteed to have another transmission failure. The cooler in the radiator is easier to flush, but the safe thing to do is to replace the radiator, too.
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3rd Gear
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no. I did blow air through it to see if it was plugged. I wont have the codes till I go back up the mountain to the truck. I connected my Forscan to monitor the tranny an the Temp did steadily climb. At 245 it failed and this time it shuddered every acceleration and then barely made it home.
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FTE Leadership Emeritus
Joined: Sep 2003
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From: Houston, Texas
Originally Posted by Mark Kovalsky
The aux transmission cooler out front cannot be adequately flushed. If it isn't replaced when the trans is rebuilt or replaced you are almost guaranteed to have another transmission failure. The cooler in the radiator is easier to flush, but the safe thing to do is to replace the radiator, too.
This is the cause of repeat failures. Most shops are in a hurry and often flush the cooler. Sometimes you can get away with it, but more often than not, you can't and should replace the cooler. It's worth the time and trouble to not have to pull the transmission again.
Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
This^^^^
This is the cause of repeat failures. Most shops are in a hurry and often flush the cooler. Sometimes you can get away with it, but more often than not, you can't and should replace the cooler. It's worth the time and trouble to not have to pull the transmission again.
This is the cause of repeat failures. Most shops are in a hurry and often flush the cooler. Sometimes you can get away with it, but more often than not, you can't and should replace the cooler. It's worth the time and trouble to not have to pull the transmission again.
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