Tranny temp 200, rpm 4k is that safe
05-22-2016, 12:15 PM
#1
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Tranny temp 200, rpm 4k is that safe
So first towing experance, in my 99 ford f150, 4.6l v8. 65 mph with head wind of 18 mph and i tan at 4k rpm for about 10 miles on a hill open road. The transmission temp never went above 200 degrees (the sending unit is in the line port in the tranny). Is that safe? I read 4 k is ok.
05-22-2016, 08:09 PM
#2
You never mentioned the weight or the frontal area of the trailer.
For every doubling in speed you increased your drag 4x.
In the towing community I too had to realize that higher than normal cruise RPM's (when not towing) vs towing will be different. As long as you not red lining you should be fine.
its best to ensure a higher RPM than a lower one lugging the engine.
For every doubling in speed you increased your drag 4x.
In the towing community I too had to realize that higher than normal cruise RPM's (when not towing) vs towing will be different. As long as you not red lining you should be fine.
its best to ensure a higher RPM than a lower one lugging the engine.
05-23-2016, 10:40 AM
#3
4K is not going to hurt your motor.
200 degrees on the tranny for a truck of that era is a great plenty. Make sure to look at your fluid and give it a smell. It shouldn't look or smell burned.
Probably a good idea to change your tranny fluid every 30K or so . . .
200 degrees on the tranny for a truck of that era is a great plenty. Make sure to look at your fluid and give it a smell. It shouldn't look or smell burned.
Probably a good idea to change your tranny fluid every 30K or so . . .
05-23-2016, 12:30 PM
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are you saying 200 is high, because before i put the tranny cooler in it was running 180's not towing.
the trannsmission fluid is brand new i just changed it.
05-23-2016, 12:31 PM
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You never mentioned the weight or the frontal area of the trailer.
For every doubling in speed you increased your drag 4x.
In the towing community I too had to realize that higher than normal cruise RPM's (when not towing) vs towing will be different. As long as you not red lining you should be fine.
its best to ensure a higher RPM than a lower one lugging the engine.
For every doubling in speed you increased your drag 4x.
In the towing community I too had to realize that higher than normal cruise RPM's (when not towing) vs towing will be different. As long as you not red lining you should be fine.
its best to ensure a higher RPM than a lower one lugging the engine.
05-23-2016, 02:18 PM
#6
Grumpy Old Man
No 200° tranny sump temp is not high. 225° sump temp is the red line.
(the sending unit is in the line port in the tranny)
Not a good location for the tranny temp sender. If the sender is in the "hot" line to the coolers, then 200° is nothing. It could go over 300° with no problem. If the sender is in the "cold" line coming back to the tranny from the coolers, then 200° may indicate a too-hot tranny because sump temp could exceed the 225° red line without you having a clue.
You need to move the sender to a port on the side of the tranny that gives you sump temp, or close to sump temp. I don't know about your tranny, but the 4R100 tranny in my 1999 F-250, and the 4R70 tranny in L'il Bros' 1992 F-150 has a port on the left side of the tranny that gives sump temp. If your tranny does not have a port that gives you sump temp, then one fix is to install a threaded bung in the side of the pan below the ATF level, and install the sender in that bung.
05-23-2016, 02:26 PM
#7
Cowboy of the Skies
4k rpm for a 4.6 is nothing.
As for your trans temps....damn i wish i could keep mine that low.
Maybe if i packed my transmission in ice before i drove it.
As for your trans temps....damn i wish i could keep mine that low.
Maybe if i packed my transmission in ice before i drove it.
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05-23-2016, 07:00 PM
#8
I picked up my tranny temp from the OBDII port on my '05. Normal was 160. Towing 180. Saw 200 only once on a long, slow climb.
If you change fluid every 30K, you will be fine.
If you change fluid every 30K, you will be fine.
05-23-2016, 07:57 PM
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No 200° tranny sump temp is not high. 225° sump temp is the red line.
Not a good location for the tranny temp sender. If the sender is in the "hot" line to the coolers, then 200° is nothing. It could go over 300° with no problem. If the sender is in the "cold" line coming back to the tranny from the coolers, then 200° may indicate a too-hot tranny because sump temp could exceed the 225° red line without you having a clue.
You need to move the sender to a port on the side of the tranny that gives you sump temp, or close to sump temp. I don't know about your tranny, but the 4R100 tranny in my 1999 F-250, and the 4R70 tranny in L'il Bros' 1992 F-150 has a port on the left side of the tranny that gives sump temp. If your tranny does not have a port that gives you sump temp, then one fix is to install a threaded bung in the side of the pan below the ATF level, and install the sender in that bung.
Not a good location for the tranny temp sender. If the sender is in the "hot" line to the coolers, then 200° is nothing. It could go over 300° with no problem. If the sender is in the "cold" line coming back to the tranny from the coolers, then 200° may indicate a too-hot tranny because sump temp could exceed the 225° red line without you having a clue.
You need to move the sender to a port on the side of the tranny that gives you sump temp, or close to sump temp. I don't know about your tranny, but the 4R100 tranny in my 1999 F-250, and the 4R70 tranny in L'il Bros' 1992 F-150 has a port on the left side of the tranny that gives sump temp. If your tranny does not have a port that gives you sump temp, then one fix is to install a threaded bung in the side of the pan below the ATF level, and install the sender in that bung.
Not my transmission but that is were my sending unit is
