Anyone wanna take bets?

[907DAVE]

14.5 volts is totally normal.

15 is a bit high, but not enough to cause any damage. Start getting close to 18 volts and the battery's wont like it much.

Check alternator A/C voltage, could be a failing diode. It should be .02 VAC or lower.

 

[WoodBoy]

Sounds like an altenator/altenator wiring problem. I know you can wrap the dodge groud wire from altenator with aluminum foil and affect TC lockup. Just an idea of how electronics are complicated

 

[Erikclaw]

14.5v sounds way high to me. Don't care if it is a diesel or a gas powered truck, I don't think they are suppose to be charging that high.

 

[907DAVE]

Google it if you don't believe me. Without a difference of potential (voltage) the battery will never charge.

 

[FallenAuthority]

Sounds like an altenator/altenator wiring problem. I know you can wrap the dodge groud wire from altenator with aluminum foil and affect TC lockup. Just an idea of how electronics are complicated

I am with you on this idea. I have seen diodes go bad in an alternator and cause hell on a vehicles electrical system from stray AC voltage running through the system, specifically control modules. I am betting this could be an issue. Check the body of the alternator for AC voltage with a multimeter and check the positive post on the alternator for AC voltage as well. I cant remember the specific spec but I want to say anything over .5v AC shows a bad diode.

14.5v sounds way high to me. Don't care if it is a diesel or a gas powered truck, I don't think they are suppose to be charging that high.

14.5 is not going to harm anything. Lots of vehicles charge in the low to mid 14's

EDIT: Straight from the workshop manual from Ford: "The voltage should be between 13.2 and 15.5 volts."

 

[01PSD]

Is this something our tranny guy Mark on here might know about?

 

[Bigdiezel]

My truck going Down the road does 14.4 volts and parked can get up to or close to 14v. I thought it was normal on stock alt and 2 odyssey batteries.

 

[Dzchey21]

If a system.charges 15v the batteries are sulfated or the system isn't regulating correctly. 14.5 imho is a bit high after the batteries have been charged unless there is a high draw constant somewhere i.e lights heater blasting supplemental heat Ect Ect.
Most systems should be around 13.9 if everything is working right. But again every system is different.

I agree on checking for ac current

 

[tbsimmons]

Have you tried disconnecting both batteries for a few minutes and seeing if clearing the computer memory works.
I have seen crazier things happen.
Also 14.5 wouldn't scare me. You have to think of the resistance in the wires also. If your gauge is reading 14.5 what is the battery seeing. I have not checked my truck, but some vehicles have over a volt of voltage drop between the alt. and the battery.

 

[FallenAuthority]

Have you tried disconnecting both batteries for a few minutes and seeing if clearing the computer memory works.
I have seen crazier things happen.
Also 14.5 wouldn't scare me. You have to think of the resistance in the wires also. If your gauge is reading 14.5 what is the battery seeing. I have not checked my truck, but some vehicles have over a volt of voltage drop between the alt. and the battery.

Then that's not a healthy system. Voltage drop should never be over .5 volts in a properly operating circuit.

 

[TyCorr]

My old pile 7.3(dual alt, dual battery) charges around 14-14.5V. Normal. My 12 duramax, 14v.

 

[tbsimmons]

Check some of your cars in different area's of the grounds. I bet you will be surprised. Do with the engine bay hot. That is the reason why I change cables on my cars with ones I make. Voltage drop is too high. .5 volt is nothing for a drop.

 

[Corb@CorbinShipping]

14.5 volts is totally normal.

15 is a bit high, but not enough to cause any damage. Start getting close to 18 volts and the battery's wont like it much.

Check alternator A/C voltage, could be a failing diode. It should be .02 VAC or lower.

Mine will be between 12.75 up to a high (today) of 14.52. Batteries are charging fine still, but my 3rd trans is about to chit the bed. Shifting became random, I lost 5th gear again (for about 1/2 mile) and then shifting got perfect... Then went to hell again.... in the course of 2 miles on the same stretch of road... volts never budged... wtf kind of transmission gremlin have I picked up?

 

[Dzchey21]

I think it's a control issue not a Trans issue

 

[Corb@CorbinShipping]

I think it's a control issue not a Trans issue

I agree... Does anyone know what all else this GEM Module would control? And why when my cab came down, the next week I smoked my first transmission? Maybe pinched of chaffed something? Maybe the TCM? Im totally spitballing here. I dont care what the fix costs, as the alternative seems to be to buy a new $5,000 trans and TC every 3 weeks....

 

[Dzchey21]

The Trans wire harness to the tcm can get pinched but not common.

 

[Corb@CorbinShipping]

The Trans wire harness to the tcm can get pinched but not common.

But after the first one, there has been 2 more transmissions loaded in there... You think maybe pinched elsewhere between the cab and frame?

 

[TyCorr]

Yea, corb, reverse that process and check the wires. ***k man, it could be a harness that isnt plugged in all the way or something along that line.

Did a pin get bent in a harness going to the trans?

 

[Corb@CorbinShipping]

Yea, corb, reverse that process and check the wires. ***k man, it could be a harness that isnt plugged in all the way or something along that line.

Did a pin get bent in a harness going to the trans?

Dont know, but I'll be checking tomorrow... Or maybe we will find it when this trans chits the bed and we remove it... LOL I'd say that I have a week left on her...

 

[Dzchey21]

But after the first one, there has been 2 more transmissions loaded in there... You think maybe pinched elsewhere between the cab and frame?

Yeah at the tcm