Engine/Transmission (1998.5 - 2002) transmission Temps

[Big A]

Driving around town, what kind of temps are you guys seeing in the transmission. I'm talking empty here.
Big A

------------------
'99 3/4 24 valver Quad,auto,KN stock, westin powder blackpushbar,autometer sportcomp

 

[Neal Cassady]

About 125 to 150 degrees F, maybe a little higher if there is a lot of traffic. This is with ambient temps below 70F. I haven't had the gauge installed long enough to test it in warmer temps yet. My sender is mounted in the TC line out on the way to the heat exchanger.

Dave

------------------
2001. 5 2500 QC, LB, 4x4, Auto, 3. 54, Everything but Leather, Bright Silver Metallic, ARE K Series, Diprocal EGT, Boost and Autometer transmission Temp(sensor in the line) in an Autometer Dash Pod, SW Fuel Pressure Gauge, Westin CPS Platinum Step Bars - Black on Stainless

 

[Big A]

Dave,
I got my sensor in the same place. What kind of wire did you use from the sensor to the gauge. I'm not getting much of a reading.
Thanx
Big A

 

[Neal Cassady]

I used 16 gauge stranded copper wire. I didn't use any sealer/tape on the sender-bushing-transmission line connection. I also connected the ground terminal on the rear of the gauge to a good ground on the firewall.

If it is cold out it can take 10 or 15 miles to move the temp gauge. After sitting all night my water temp will hit 190 before the transmission heats up. Try backing slowly up a hill after you are warmed up, that usually moves the gauge pretty good.

Dave

[This message has been edited by Dave D (edited 03-29-2001). ]

 

[Archive]

I've got my sender in the Mag-Hytech pan. Yeah, I know that is not the prefered place, but that should be rectified soon as I plan on having one in the line as well as the pan. I'd like to see both when getting hot.

None-the-less, the highest I've seen empty here in Phx. , in stop and go summer driving is a tad over 175. Once locked up, it will quickly drop to 125~150.

Pulling a 28' Airstream at 7k dry, in stop and go 60 degree weather, 195. Again, once locked up at 50mph plus, dropped to 125~150 or less as outside temp dropped. Figure, it is not going to go too much below the engine water temp given the heat exchanger unless outside air temp and flow is significant over the cooler up front.

I wish someone like Bill K could explain danger zones for oil temp in various places of our slush-boxes. Is 250+ coming out of the converter, while pan (*fresh* oil source) temp is 125 unhealthy? At what temp and what duration does oil damage happen?

Since new, I've taken the approach to drain the pan every other engine oil change. Filters at 15k. No OD while towing if RPMs under 2k. Ease up on fuel pending TC lockup and then slowly rolling back on power.

Now that the warrenty is up, it will soon be going to Fred Swanson here in Phx for DTT VB and TC. Followed by two BOMBs!

------------------
'99 4x4 • SB • QC • 3. 54 • LSD • AT • Leather • Mag-Hytech • Westach Guages • Line-X • Tommy Gate

 

[RobbyRam]

I have the dip-stick sensor from Geno's Garage and the readings are around 175 after a 15 mile freeway run up a 5% grade.

------------------
Y2K Black 3500 ISB 4x4,Weekender laadder rack, 4:10 LSD,Auto,QC,SLT Laramie,"EZ",DTT VB,DD2's,K&N,LB,Polished Stull Billet Grill/Fog inserts, Chrome Smitty-Built Step Rails, Mopar Chrome-Tipped Mud Flaps, A-Pillar mounted West-Tach Turbo/Pyro/Trans Temp gauges,Rancho 9000's set at '1',Diamond Plated Tool Box, OEM U. R. Bedliner + a bunch of other stuff. Aren't I pretentious?
Fact:The First Fords' had 'DODGE' Engines! The new PSD's need them!

 

[Bill Kondolay]

As a basic guideline i tell my customers
275degrees is getting on the high side, when reading your trans temp from the front cooler line, ( the line that goes from the transmission to the heat exchanger)
Keep in mind if you see temps going above that you should consider a secondary cooler for your application.

When reading trans temps in the pan, Chrysler has their panic level between 230-240 degrees.

I usually consider 210-220 high in the pan.
If you are seeing temps above that you should consider a cooler for your application.

Normal operating temps between 180-190 out of lock up in the cooler lines , heavy traffic, (stop and go)

In the pan, normal operating temps should be 140-150 .


Bill

 

[Big A]

Thank you fellas.
Bill,I took your advice from a while back,and put in the transmission line with the sensor port in it. I'm seeing between 125 and 150 with normal driving. The reason I wasn't seeing any temps,was because I forgot to hook up the ign. wire #ad
. I guess you learn something new every day.
Big A

 

[MVieira]

I hope I don't offend anyone, but I kind of wanted to add my $. 02 worth. Working for a CAT dealer for 21 years, CAT has always checked the temp. at the torque converter outlet line going to the cooler, this is the hottest oil and CAT wants the operator to shift down or stop and let it cool down before the temp. gets into the red. I like to relate this to my truck and shift down or when I'm backing up, to stop & let it cool before it gets too hot. CAT says dino oil fails at 275 deg. and usually the trans. temp. guage starts into the red at 260 deg. On my truck, with the sender in the line to the cooler, I've seen 180 deg. in stop-n-go and as high as 220 deg. backing my 5th wheel up my driveway.