O.D. and TCC with cold ambient temps.

[HoleshotHolset]

With the recent cold ambient temps (35-40's)..... my transmission doesn't seem to like O. D. very much... . it only engages once the engine is at around 140*F..... same goes for the TCC.



It did it leaving from Massdiesel's place yesterday... even though it wasn't really cold out... . I probably should have turned around and let someone take my truck out for a ride, but I had to go to work.



Anyone else experience this? Mine's a 47RH, if that matters.....



Matt - hoping that my 47RH is gonna be okay.

 

[illflem]

Sounds like you have a problem with the trans temp sensor, maybe just a poor connection. My AT will shift into OD at about the same 1. 5 mile mark from home no matter if it's below zero or 90° out, this is before the coolant temp has even budged. The sensor couldn't be too expensive, some folks have replaced it with a resistor, 7k I think, this would be an easy way to check on what's up.

 

[HEYBOSS]

Call Scott

Mat give Scott a call, he will know for sure.

I know on my truck OD will not kick in until a certain temp is reached and it says so in the manual, yours is a different year so I don't know if it is the same or if you have a problem but Scott can answer that.



Good luck,



Fred.

 

[dezrat]

94 auto

The first winter I had my 94,I had alot of problems with the trans not shifting into overdrive and/or the tc not locking up.

This was happening with the temperature around 20F.

I would drive for many miles before it upshifted into 4th. Once I drove most of the way from Pahrump to Las Vegas (55miles) before it shifted.

I took it to the dealer twice but their attitude was " we can't duplicate it and we never heard of it so it must not be happening. " I did get them to change the trans temp sensor but in my case that did not help. However I believe that is most likely your problem.

My initial solution was to always use the block heater when I planned to drive early and it was cold outside. That worked.

Later I added a Horton and with it I no longer needed the block heater. I still plug it in but I do not need to because of the trans.

If you have a 94 shop manual,page 21-103 states that 60F is what the trans fluid needs to be to shift into overdrive.

My 94 runs real cool. I never see 190 unless I am in Las Vegas traffic with the ambient temperature around 110.

Maybe Dodge has a fix for your problem now. They sure didn't in 95.

Hope this helps you.

 

[Batman]

Matt-

FWIW - My manual says that transmission will nopt shift into OD until trans temp is at least 60 deg. F. (it's been awhile since I read the manual so I'm pretty sure 60 is the correct number. )

But, as Heyboss said, call Massdiesel, he'll know for sure.

George

 

[Fireman Dave]

Yeah, I've noticed that with mine too. When it's cold out, it takes longer to get it to shift into OD. It goes to a higher RPM before it makes that shift for the first time.



Hey Matt, nice avatar, by the way.

 

[HoleshotHolset]

Fireman Dave, I put together that avatar about 2-weeks ago... . and I've been hemming and hawing as to whether or not to use it... ... well, there it is... hope nobody hates it.



Sounds to me like I need a transmission oil heater... . hey wait... . the pan is steel (stock) so I could buy one of those little magnetic heaters and stick it on there and heat up my fluid before I plan on leaving.



MANY thanks to all the responses... . seems like I have an annoying problem that a Horton setup would help fix, but I just can't justify the $800 right now for that. An Esbar (sp?) would help out too... but there goes that $800 again... .



By the way... how did that install go on Saturday??



Matt - my transmission is so cool that it needs a sweater!!

 

[HEYBOSS]

Avatar

HoleshotHolset



New Avatar!