Engine/Transmission (1994 - 1998) transmission temp??

[diesaldual]

After about a year of waiting to put the gauge to use I finally installed my sending unit in the hot line(with the help of jannetty racing temp manifold).

My question is how hot should this thing get. This morning running down the interstate at about 70mph she got to 210-230, then when I got of the interstate and stopped and waited at the red light she went to 250-pegged the meter and never came back down below 240.

Should I check my sending unit?? What if if if?? Help!!

 

[SlyBones]

What kind of gauges / sender did you install? Something sounds wrong. I would check to make sure its properly installed, grounding, wiring, etc. Need to know a little more about the sender and its connection to the gauge.



In general, TC make heat when in fluid coupling mode, and dont make heat when in lockup. Tighter TC's make more heat sitting at a stop in traffic, and make less heat while moving compared to looser/stock TC's.



I have been using a DD pan and synthetic fluid which probably helps, but unless I am towing or sitting in stop and stop traffic for long periods of time, my Isspro EV series never moves off the peg ( 140* or less hot line ).



While crusing down the freeway at 70 you should be in lockup. If the temps were up, then should see them come down as soon as you hit lockup. If they were not up they should not go up by driving in lockup.



Lets say you are pulling the RV out of a camping spot in 1st/2nd gear, and it has a nice little incline, Hot Line temps of 230-250 are not uncommon.



If you are struggling to backup at RV into a spot, in reverse a lot, maybe a little incline to it, trans temps can get way up there. Watch these very close. Good use of a 2 wheel low kit, even for us auto guys.



My '97 the PCM would shift the transmission into OD as low as 30-35mph. But it does not go into lockup until 50mph. Unless you use the OD lockout button, typical driving in city traffic was using OD unlocked a lot. This used to get my hot line temps to about 180 or so. -- Using the OD lockout button will save this as you use 3rd locked instead of OD unlocked for city driving. -- Now I have a DTT smartcontroller. This keeps the transmission in 3rd until 50mph ( user adjustable ). Then it goes to OD and locked. So even if I forget the OD button city driving is 3rd not OD which appears to be less load on the transmission because now the temps dont go up at all, in these circumstances.

 

[diesaldual]

It is autometer gauge and sending unit.

I have had torque converter changed also about a year ago to alot better unit.

When in lockup it is around 210-230degrees.

 

[SlyBones]

I really dont know what the autometer sending unit looks like. Does it have 1 wire or 2. The Isspro ev series I now have has 2 wires. The old model only had 1.



With the 1 wire setup the ground comes from the body of the sending unit, via the threads. Dont know about the 2 wire setups. Anways depending on installation method, is this piece properly grounded? Did you use any teflon tape in the threads, interferring with proper grounding? Any wires crosses or reversed on 2 wire setups. Proper +12 and ground at the gauge?



Whats a jannetty racing temp manifold?

 

[diesaldual]

Slybones thanks for the reply's.

After your first post I went out and crawled under the truck and guess what I found, a broken ground wire that goes to this meter. Hooked it all back up and now she seems to be doing better.

Getting 160degrees at 70+mph and gets better as I put the +to mph's if you know what I mean.

Thanks for the help.