Odd 48RE tranny shift
Coming back from the cool north to Florida my 05 Dodge diesel started running a bit warm. It was not overheating just a little hotter than normal. My temp. gauge usually sits just in the center line o...
Forum Discussion
Some bean counter had a fuel saving (bad) idea.....
2005 Dodge 48RE transmissions are the *only* year that has this *unique* feature:
Besides changing the shift points......
Pushing the tow/haul button on the 2005 Ram will lock out OD - *until* you press the accelerator - then it will shift back to OD (and remain in OD).
TWO things Tow/Haul on a 2005 does:
1. Changes shift points.
2. *Temporarily* locks out overdrive.
If you start (say from a dead stop) under load in TH, OD will stay locked out - *until* the computer decides (less load) it's time to shift into OD.
When that happens - it stays in OD - until you play the "button game" again.
Prior to the 2005 - pushing the TH button, locked out OD - until *YOU* canceled it.
Really just an OD "on/off" button.
For 2006, it changed to one push for Tow Haul, 2 pushes for OD lockout.
(or vice-versa).
Soooo - lots of strain on the Torque Converter for 2005s.
"Could be" (along with other things) the source of overheating.
Note: even the tranny folks say the '05 Trans cooler is way more than adequate.
I am re-considering the flash - as my 48RE went south at 80K miles.
(Original owner, not many towing miles, well taken care of, etc., etc)
Previously, I thought I would rather have the TH option - than true OD lockout.
Now I'm on the fence on that one!
BTW - BD (part #1031350) makes a converter to do the same thing as the 2006's for towing or running an exhaust brake.
About $200. - or if you're electrically talented, you can do the same on "the cheap" (the "mystery switch").
Google: BD Overdrive Lockout Switch for 2005 Dodge".
One of the retailers has the BD pdf on their site - which explains how it functions.
And - Spend some time on the various Dodge Diesel forums - you have to "filter out" the un-informed - regarding the "unique" 2005s.
Great source of *reliable* info on several of those forums is poster/moderator "cerberusiam".
Good luck..;)
~
2005 Dodge 48RE transmissions are the *only* year that has this *unique* feature:
Besides changing the shift points......
Pushing the tow/haul button on the 2005 Ram will lock out OD - *until* you press the accelerator - then it will shift back to OD (and remain in OD).
TWO things Tow/Haul on a 2005 does:
1. Changes shift points.
2. *Temporarily* locks out overdrive.
If you start (say from a dead stop) under load in TH, OD will stay locked out - *until* the computer decides (less load) it's time to shift into OD.
When that happens - it stays in OD - until you play the "button game" again.
Prior to the 2005 - pushing the TH button, locked out OD - until *YOU* canceled it.
Really just an OD "on/off" button.
For 2006, it changed to one push for Tow Haul, 2 pushes for OD lockout.
(or vice-versa).
Soooo - lots of strain on the Torque Converter for 2005s.
"Could be" (along with other things) the source of overheating.
Note: even the tranny folks say the '05 Trans cooler is way more than adequate.
I am re-considering the flash - as my 48RE went south at 80K miles.
(Original owner, not many towing miles, well taken care of, etc., etc)
Previously, I thought I would rather have the TH option - than true OD lockout.
Now I'm on the fence on that one!
BTW - BD (part #1031350) makes a converter to do the same thing as the 2006's for towing or running an exhaust brake.
About $200. - or if you're electrically talented, you can do the same on "the cheap" (the "mystery switch").
Google: BD Overdrive Lockout Switch for 2005 Dodge".
One of the retailers has the BD pdf on their site - which explains how it functions.
And - Spend some time on the various Dodge Diesel forums - you have to "filter out" the un-informed - regarding the "unique" 2005s.
Great source of *reliable* info on several of those forums is poster/moderator "cerberusiam".
Good luck..;)
~
