Possible Transmission Update?

[glennco1]

I had read an article stating that in the '05 model year the tranny was going to have a tow mode to only shift into overdrive at a higher rpm.

Does anyone know if we can get this patch applied to our existing 545RFE transmissions, similarly to the update to turn a 445RFE into a 5 speed?

thanks

[xj31]

I haven't heard anything.typically,if it ain't broke,chrysler won't fix it,they would prefer you to buy an '05.I personally would not expect anything from them.They usually don't do anything unless it's to address a problem

[glennco1]

I had read in some dodge forums that you could go in and request a patch to apply the 545 to your 445 tranny on the dakotas.

Was this possible on the jeep 445s as well?

Also, is the new tow mode system just a software change to the existing 545, or were there hardware changes to support it? If not, I don't see why you couldn't at least request the update.

thanks

[xj31]

the first problem that I see is that in '05,they changed the modules.The older ones had a seperate pcm and tcm.Before they used a JTEC controller,now they call it NGC controller.now its all in one module.unless it uses the NAG trans then it still has a seperate tcm but that is only on the WKs with a 3.7.And yes they did come out with an update that changed the 45rfe to a 545rfe and that was for jeeps

[glennco1]

xj, thanks for the info, given the control module updates it doesn't sound like I'm going to be able to get that upgrade.