Tranny Temps Climbing
07-22-2007, 05:08 PM
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Tranny Temps Climbing Over the weekend, I noticed my tranny temps were up in the 220-240 range. Tranny shifts hard and firm, converter locks up fine.
Temps won't go down. Engine temp is around 200*
Tranny = FLP Level IV
Converter = Vig 3200
Cooler = B&M 24K
My guess is the tranny is starting to slip. So before I plan on a replacement. Anything else it could be?
Temps won't go down. Engine temp is around 200*
Tranny = FLP Level IV
Converter = Vig 3200
Cooler = B&M 24K
My guess is the tranny is starting to slip. So before I plan on a replacement. Anything else it could be?
07-22-2007, 07:48 PM
#4
Well that helps, thanks.
How long have you been seeing these temps?
Has there been any work done, tuning etc...?
Check your fluid condition, if it is dark and has that pungeant cooked trannsy fluid smell, then yeah you might want to plan a replacement. If the fluid is ok, then you may ahve a converter clutch going away generating heat and debris.
g
How long have you been seeing these temps?
Has there been any work done, tuning etc...?
Check your fluid condition, if it is dark and has that pungeant cooked trannsy fluid smell, then yeah you might want to plan a replacement. If the fluid is ok, then you may ahve a converter clutch going away generating heat and debris.
g
07-22-2007, 08:22 PM
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Started last weekend when the converter wasn't locking up. A bit low on fluid so added some. No work done lately. Just tuned the tranny to shift earlier from 6400 to 6200.
Fluid looked fine. Smells ok.
So even if the converter locks up fine, it could still be the converter? I bought the converter used 2 years ago. Tranny is 3 years old.
Fluid looked fine. Smells ok.
So even if the converter locks up fine, it could still be the converter? I bought the converter used 2 years ago. Tranny is 3 years old.
Last edited by Ed Blown Vert; 07-22-2007 at 08:45 PM.
07-22-2007, 09:26 PM
#6
Yes.... the converter not locking is the reason for the temp increase.
But in one sentence you say it started with the converter not locking and then you say it is locking up just fine..... something has changed in your powertrain to generate heat right? If it is shifting properly and the fluid condition is good then that is a major clue! The converter generates 90% of the heat in an automatic. If it is locked up, it is not generating heat, or at least not near the same as if it were not locked up.
Your condition is directly related to your tune I bet. If the converter does not lock up it will generate heat if it is a higher than stock stall...and even those do the same thing, just not as acute as a high stall unit. Take a look at your lock up tables and see how they have been affected by the recent changes.
It is my opinion that your TCC lock up tables were modified and now your converter is spending more time unlocked than it should be or than it was previously. And that is where the heat is being genreated.
g
But in one sentence you say it started with the converter not locking and then you say it is locking up just fine..... something has changed in your powertrain to generate heat right? If it is shifting properly and the fluid condition is good then that is a major clue! The converter generates 90% of the heat in an automatic. If it is locked up, it is not generating heat, or at least not near the same as if it were not locked up.
Your condition is directly related to your tune I bet. If the converter does not lock up it will generate heat if it is a higher than stock stall...and even those do the same thing, just not as acute as a high stall unit. Take a look at your lock up tables and see how they have been affected by the recent changes.
It is my opinion that your TCC lock up tables were modified and now your converter is spending more time unlocked than it should be or than it was previously. And that is where the heat is being genreated.
g
07-22-2007, 11:11 PM
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I guess I wasn't too clear. Last weekend my temps rose and the converter stopped locking up. I was a bit low on fluid and after adding some. The converter started locking up fine.
This weekend I took the car out and cruised on the freeway, the temps were about 220 with the converter locked. Even while at freeway speeds the temps never dropped.
I understand if the converter isn't locked, temps will increase.
TCC tables were not touched, only the "Full Throttle Shift Speeds" tables.
What I don't understand is the temps not dropping while locked and at freeway speeds.
If let the car idle and keep the fans on, the temps never drop. Engine temp will drop to 180.
And thanks for trying to help
This weekend I took the car out and cruised on the freeway, the temps were about 220 with the converter locked. Even while at freeway speeds the temps never dropped.
I understand if the converter isn't locked, temps will increase.
TCC tables were not touched, only the "Full Throttle Shift Speeds" tables.
What I don't understand is the temps not dropping while locked and at freeway speeds.
If let the car idle and keep the fans on, the temps never drop. Engine temp will drop to 180.
And thanks for trying to help
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07-22-2007, 11:21 PM
#8
bear in mind that the trans will may some heat of its own and if your running through the factory cooler the trans will be forced to run at east at that ,I would check that there is adequate air fow and fans working 220 while warm is not and outragious temp
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07-22-2007, 11:31 PM
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Yep, currently it runs to the factory cooler than the B&M. I am going to bypass it since its not my DD.
220-240 is not what I normally see so it had me worried.
When should I worry?
I'll check the cooler and make sure it's working.
220-240 is not what I normally see so it had me worried.
When should I worry?
I'll check the cooler and make sure it's working.
07-23-2007, 03:15 AM
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do you have the lower air dam installed on your car?
when i bought my car it didn't have one and the tranny temps on my car with a stock tranny/stall climbed to 195* with a 24K b&m cooler installed.
but once i installed the air dam, my tranny temps dropped off....i bearly see 180* and thats driving in a neighborhood for an hour or so..
when i bought my car it didn't have one and the tranny temps on my car with a stock tranny/stall climbed to 195* with a 24K b&m cooler installed.
but once i installed the air dam, my tranny temps dropped off....i bearly see 180* and thats driving in a neighborhood for an hour or so..
07-23-2007, 08:34 PM
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Might also check that there is nothing going on in the fluid
path; for example a collapsing hose on the suction side or
a blockage in the lines, etc. Feel the cooler lines and if they
are cool at both sides of the cooler, there's no fluid moving
in the cooling loop. Both sides equally hot means an air
problem, and like that.
path; for example a collapsing hose on the suction side or
a blockage in the lines, etc. Feel the cooler lines and if they
are cool at both sides of the cooler, there's no fluid moving
in the cooling loop. Both sides equally hot means an air
problem, and like that.
07-24-2007, 10:19 AM
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Originally Posted by Ed Blown Vert
Yes both sides of the cooler was very hot. I will check for air flow this weekend. Thanks.
I'm swapping my 32K cooler for a 40K perma cool here shortly and running a fan on it... cant be too safe...
07-24-2007, 08:32 PM
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Originally Posted by silver-mod-o
I'm swapping my 32K cooler for a 40K perma cool here shortly and running a fan on it... cant be too safe...
07-25-2007, 06:58 AM
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Originally Posted by Ed Blown Vert
Isn't that a large cooler? Where are you going to install it?
-probably also helps to know I'm working on a truck... hence the 4500lb weight... and need for such cooling capacity, I'd suspect you'd be good with anything over 30K which is considerably smaller.
