new problem tranny hot
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Joined: Oct 2010
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new problem tranny hot
This is my 2nd post and new to diesels altogether . My stock top right gauge is my transmission gauge temp right ? well I'm an idiot thought it was my engine temp been getting into the orange a couple times and red once(yes I know I need aftermarket gauges but first things first) but only after driving 45 min to 1 hour. Went to Auto Zone to get a scanner but don't think I got the right one suggested by WH 6.0 and amgpro2(thank you by the way) so need one to check tranny temps to see if really getting hot or any other suggestions. Had "mechanic" replace tranny sensor $350 still reading as though its heating up "mechanic " says now need a $200 tranny harness?What should I do any help would be GREATLY appreciated!
Hotshot
Joined: Jul 2005
Posts: 13,834
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From: Middle Tn.
Has the tranny been flushed and the ext. filter changed according to maint. requirements? Every 30,000 miles min.
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New User
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Tranny was "supposedly" flushed 2 days ago by the "mechanic " that WAS working on my truck and replaced my oil cooler . That's why I'm askin for your guys help.Need to know what to do next otherwise gonna take it to a dealer and see what I should do?
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Fleet Owner
Joined: Nov 2003
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The harness has been an issue for some model years. You have a plug in your tranny pan. You can get it up to temp and drain it into a pan and measure the temp quickly to see if it really is that hot. To drain the pan would require only 8 quarts of fluid. You could even drain only a quart or so, it is just messy to put the plug back in when the fluid is hot.
FYI:
Between 100-220F the needle will remain in the same position on the gauge. At 230F it will move up slightly to the middle of the normal range. At 250F it will move to Yellow. The gauge moves to red at 280.
Mine runs consistently below 160 deg F. You can tell a difference easily between this temp and 250 deg F. Also, I can shoot my pan w/ an IR temperature scanner and let you know what that reads if it would help you.
Hopefully you are using Mercon SP or LV fluid - it is important. Hopefully also, the external filter replacement has been done at proper intervals.
Another BTW - the Tranny codes are not read by most aftermarket code readers. You usually need to go to the dealership for that.
FYI:
Between 100-220F the needle will remain in the same position on the gauge. At 230F it will move up slightly to the middle of the normal range. At 250F it will move to Yellow. The gauge moves to red at 280.
Mine runs consistently below 160 deg F. You can tell a difference easily between this temp and 250 deg F. Also, I can shoot my pan w/ an IR temperature scanner and let you know what that reads if it would help you.
Hopefully you are using Mercon SP or LV fluid - it is important. Hopefully also, the external filter replacement has been done at proper intervals.
Another BTW - the Tranny codes are not read by most aftermarket code readers. You usually need to go to the dealership for that.
Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
Ask the "mechanic" what type of ATF was used. The wrong type could be the problem. Otherwise you may need that harness. BTW I would not drain the fluid to check the temp. If it really is over 200 you could scald your hand. Just put your hand on the pan. It should be apparent if it's ~160 F (normal) or really over 200 F (screwed up).
Fleet Owner
Joined: Nov 2003
Posts: 27,894
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Ask the "mechanic" what type of ATF was used. The wrong type could be the problem. Otherwise you may need that harness. BTW I would not drain the fluid to check the temp. If it really is over 200 you could scald your hand. Just put your hand on the pan. It should be apparent if it's ~160 F (normal) or really over 200 F (screwed up).
I drain my engine oil when it is hot (around 210) and collect oil samples. You just put gloves on if you are going to hold a container. It is not hard to do without burning yourself - assuming you are being careful and are quick.
The real issue will be if you try to install the drain plug back in while it is draining. I would agree w/ you on this one moebdick, I wouldn't recommend it!
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
as a rule we replace both the harness and the tft at the same time. the reason for this is when doing the pinpoint test it will normally pass and its impossible to tell what one is causing the concern.
after that if it still fails you have an issue.
after that if it still fails you have an issue.
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