whooptide

i have my temp sensor for my tranny installed in the line TO the cooler. i register up to 190 degrees almost w/out fail for stop and go city driving and a bit lower, down to 160 depending on the outside temps when on the fwy. for those of you w/the sensor inline to the cooler, what are your readings? i have not towed yet, so i am interested in finding out what others are reading ........thanks

davegsxrold929r

same as yours., can actually go to 210 or so., with alot of stop and go... and towing is the same., 170-180 on the highway., and 210 stop and go., and up to 230

whooptide

thanks.....been reading a lot of posts from guys w/the sensor in the pan on their rigs.....

Nuttymopar

I just installed in the line to the Cooler also. I am lucky to see it get past 100* or so. Never to the 180* using a Di-Pricol tranny temp. I have been wondering myself as I just thought it should be a little higher. I am wondering if I used too heavy of a wire coming from the sender to the gauge. I don't remember what size, just found a good thick one so used that one.

I plan on testing with meter at the sending using and then the gauge to see if any drop in voltage.

robfitz

I too have the DiProcol gauge with the sending unit in the to-cooler line and I also rarely see it go much above 100... and I live on the face of the sun. I installed it in the winter and for a while I thought it was broke cause it never moved. I never considered the wire might be too big, pretty sure I have a 14 gauge on there.
Now, summer, it will bounce up to about 120 in heavy stop-n-go traffic but as soon as I get going again it goes back down to 100. The only time I've ever seen it get to 180+ was when I was pulling a 6k+ trailer up a 4-6% grade hill in 100+ degree weather. Also, if I'm on slow-go, 4x4, dirt, mountain roads it will bounce around 120.
I've quit worrying that it's broke. I know the fluid level is good and the tranny feels solid so I just keep an eye on it and go, go , go...

underwoodtransp

I have mine in the pan and normally see freeway speeds at around 165-180 and stop and go up to 210 or so... Always towing heavy!!!! I notice that if i get alot of stop and go and then get to park and idle it will climb just above the 210 and never cool off untill I get to go again.

Nuttymopar

I don't know about the 48RE but on my 1st gen (47RE) that in Park, it will not fow the fluid throughout the complete tranny. I was told to leave it in 'N' to have it completely flow throughout and it would bring the temps down faster. I assume the same is true for the newer tranny.

I'm glad to see that the temps don't go up much. I do see it rise very little (don't tow anything, daily driver mostly) and it I do start to move, it goes back down pretty fast.

ARMYRAM

Just returned from a cross country trip, heading out was at 160-190, getting to the coast was seeing above that, started to climb higher. Got into Denver vicinity and contacted the dealer.
They hooked up the service gages, reported that in 100F local temp that the trans was normal, 180-190F. Would expect to climb when towing, 10K in a 5th.
Had them do a service as it was due, found the bands slightly loose at 24+K. My sender is in the line out, am expecting arrival of a PML pan soon, and will move the sender to the pan.
the trans man in the Ferrero dealership in Loveland, Co. states the proper place to monitor is the pan, same place DC does. I run Autometer BTW.
Army
My 2 cents.

Dr. Diesel

After 32 years with both Detroit Diesel and Allison Transmission Engineering, let me offer the straight "skinny"...

A temp sensor should be in the "hottest" area of oil operation, specifiaclly in the line out to the cooler... The rub here is, however it must be in a big enough inline fitting so as NOT to offer any flow restriction in the line... Otherwise, install it in the pan, fed by returned cool oil, where you can figure the temp is 10 to 20 *F cooler than the hot trans-out to cooler flow...
So... If the sensor is in the pan, you must figure your hottest oil at up to 20*F hotter...

Max allowable automatic trans oil operating temp should not exceed 250*F... so temps experienced above... even towing, say a lot for the QUALITY trans cooler sized by the Mopar guys for our Cummins / Dodges... Afterall, it's the same Corporation building FREIGHTLINER and MERCEDES... I am really pleased with my Dodge... Quality is superb... and performance is outstanding... No kidding, my 325 HP Cummins turbo Ragburner can ALMOST keep up with my 350 HP C-5 Vette !!...and now a year and 16K miles on the Dodge, and 4200 miles on the C-5, and not a single warranty issue has occured with either the Dodge OR the little red Chevy compact... "Viva!" to Saltillo, Mexico... and... "Kudos!" to Bowling Green, Kentucky !!!...

Cheers... ...Ted