Trans temp to high?
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Junior User
Joined: Jun 2011
Posts: 57
Likes: 0
Trans temp to high?
Today the outside temp is about 107. My buddy has a 99 7.3 4x4. He text me and said at a stop light trans temp climbs to 220. driving is about 200. That seems too high. Im thinking the cooler is clogged. Any suggestions? Thanks
Tuned
Joined: Oct 2005
Posts: 427
Likes: 1
From: Melrose MN
It is located on the side of the tranny and connects the inlet and outlet of the cooler lines. If your cooler become clogged the bypass opens because of the pressure and still allows fluid to flow and lube the tranny. I unhooked the outlet line from the tranny before the cooler and had no flow that was how I knew it was bad. Also had help from Mark. Do a search on tranny flushing and you will learn where the lines go and other good info.
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Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
The stock trans.cooler is very small,way too small for these trucks.....the cooler on the left is a stock 7.3 cooler,the one on the right is a stock cooler from an'06 F250...a 6.0 cooler...
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,714
Likes: 2,639
From: SE Florida
These transmissions run 60-100°F above ambient. They can run 220°F all day long with NO problems. Your fluid is NOT burned from running 220°F.
The main problem with the early trucks is that they didn't have a cooler in the radiator and the air to oil cooler wasn't big enough, either.
The main problem with the early trucks is that they didn't have a cooler in the radiator and the air to oil cooler wasn't big enough, either.
Molon Labe
Joined: Dec 2006
Posts: 5,272
Likes: 1
From: Alaska
My BTS was at 200 in traffic today @110* ambient.
Thats with my Tru-cool cooler and an upgraded OTW radiator, (my 26 row 6.0 cooler is still laying on the kitchen table....
)
Adding a larger cooler is a great Idea, but My original trans lasted 240k with just the little stock cooler, so 200* temps no longer bother me.
We have gotten spoiled with the quest to have low trans temps...
Thats with my Tru-cool cooler and an upgraded OTW radiator, (my 26 row 6.0 cooler is still laying on the kitchen table....
)Adding a larger cooler is a great Idea, but My original trans lasted 240k with just the little stock cooler, so 200* temps no longer bother me.
We have gotten spoiled with the quest to have low trans temps...
Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
My BTS was at 200 in traffic today @110* ambient.
Thats with my Tru-cool cooler and an upgraded OTW radiator, (my 26 row 6.0 cooler is still laying on the kitchen table....)
Adding a larger cooler is a great Idea, but My original trans lasted 240k with just the little stock cooler, so 200* temps no longer bother me.
We have gotten spoiled with the quest to have low trans temps...
Thats with my Tru-cool cooler and an upgraded OTW radiator, (my 26 row 6.0 cooler is still laying on the kitchen table....
)Adding a larger cooler is a great Idea, but My original trans lasted 240k with just the little stock cooler, so 200* temps no longer bother me.
We have gotten spoiled with the quest to have low trans temps...
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,714
Likes: 2,639
From: SE Florida
The fluid will start burning above 400°F. That's not a typo, I said above four hundred degrees Fahrenheit.
Ford specs say it can run all day long with NO problems up to 220°F. You can go up to 250°F for no more than 1/2 hour at a time. If you get above 250°F you should find a safe place to stop and idle or fast idle in park or neutral to cool the trans.
Ford specs say it can run all day long with NO problems up to 220°F. You can go up to 250°F for no more than 1/2 hour at a time. If you get above 250°F you should find a safe place to stop and idle or fast idle in park or neutral to cool the trans.
