Trans temp
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Junior User
Joined: Mar 2010
Posts: 96
Likes: 0
From: austin Tx
Trans temp
So I installed gauges a few weeks back, Trans temp, boost, and egt, everything seemed normal until it started warming up outside. Today I noticed the temp was at about 90deg above ambient unloaded. Is this normal. I have read that 75-100 is ok but I am assuming that is loaded. Am I just being paranoid? And it increases while stopped at a stop sign.
Senior User
Joined: Sep 2010
Posts: 145
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From: Stafford, Virginia
my 7.3 runs 60-70 above ambient, even when towing. 90 above is alot, and increasing at a stop is not good. should drop when stopped. may have a stuck cooler bypass valve. search the threads on that. much info.
Laughing Gas
Joined: Aug 2003
Posts: 836
Likes: 9
I don't think its normal for your Trans temp to go up when idling... I have heard that temps will rise if the bypass valve sticks. Some try tapping on it to get it to release. I just installed gauges on my 99 as well but I have not been able to get the Trans temp to get much above 100 but where I live it's only in the 40's and 50's right now. Just curious what was your outside temp? My 99 had a very small Trans cooler which I upgraded to the 6.0, about 2 1/2 times bigger.... Also the 99's don't route the Trans line through the radiator so no additional cooling there...
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Junior User
Joined: Mar 2010
Posts: 96
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From: austin Tx
So this morning I got in my truck and before I started it I recorded a few temps and I realized the problem right away before I even started my truck the trans temp was reading 75 deg. That’s nice since its 50 outside. So I contacted the manufacture and they are sending me a new sending unit
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
Good Catch. That right there is why i always check gauges before i install them or rely on them.
Before you thread in the new sender, Check it against a boiling pot of water and another gauge reading the water temp to compare..
Before you thread in the new sender, Check it against a boiling pot of water and another gauge reading the water temp to compare..
