Need help isolating or moving trans temp sensor
#1
Need help isolating or moving trans temp sensor
I'm sorting out the remaining issues on my HPCR/48RE conversion of my '68 F250. I've been working on what I thought was a tranny overheat problem after the truck had run a while, but what I've figured out (with the help of my point and shoot LED temp sensor) that the tranny is not overheating. The 4" exhast runs right along side the transmission and very close to transmission temp sensor. I am assuming that as the exhaust pipe heats up under load it is 'cooking' the temp sensor.
Is there another spot on the transmission I can locate the sensor? Is there a simple way to shield the sensor from the exhaust pipe?
Thanks
Peter
Is there another spot on the transmission I can locate the sensor? Is there a simple way to shield the sensor from the exhaust pipe?
Thanks
Peter
#2
Registered User
MASS diesel sells a replacement tranny line (goes between trans and cooler on the side of the block) that has a port for the trans temp sensor. It's what I used and provides the hottest point to monitor temps at...
Where are you checking temps with your LED temp sensor and what is it hitting?
Where are you checking temps with your LED temp sensor and what is it hitting?
#4
Thanks for the MASS diesel idea.
I'm checking at the bottom of the transmission pan and at the inlet and the outlet of the transmission cooler. I'm hitting 150 on the pan and the inlet to the cooler and 120 on the outlet while the gauge is showing 250.
Peter
I'm checking at the bottom of the transmission pan and at the inlet and the outlet of the transmission cooler. I'm hitting 150 on the pan and the inlet to the cooler and 120 on the outlet while the gauge is showing 250.
Peter
#5
Registered User
The pan is not a good place to check trans temps in my opinion. Check the output line, it is the hottest and most accurate. Even if the pan fluid is cool, the output line temps could be hot enough that the fluid inside cannot lubricate the internals and will break down and not do its job. Then, it gets cooled down and sent to the pan where it can be overheated again, causing trans failure. Check the output line temp after you have backed up a hill at lower speeds.
Thread
Thread Starter
Forum
Replies
Last Post
bulabula
3rd Gen Engine and Drivetrain -> 2003-2007
7
11-11-2013 10:35 PM
Richpwb
3rd Gen Engine and Drivetrain -> 2003-2007
2
08-15-2008 08:01 PM
RonP
3rd Gen High Performance and Accessories (5.9L Only)
8
11-02-2005 04:22 PM