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View Full Version : 99' 6L Cummins Shifting Issue

Vettezuki
07-18-2014, 11:11 AM
What is like the cause of the following behavior.

When going about 45mph, especially under any slight load like an incline, our 99' Dodge Truck will upshift too early, then it will immediately kick down, back and forth. Not a problem going slower or faster.
Shaolin Crane
07-19-2014, 12:32 AM
Front pump, time for a rebuild
Vettezuki
07-19-2014, 04:42 AM
WTH is a front pump?
enkeivette
07-20-2014, 09:20 AM
I know someone who will buy that Cummins as is. Unlike Guy, he'd rather be Cummins than Stroke'n.
enkeivette
07-20-2014, 09:21 AM
Although, I wouldnt sell it if I were you. A Cummins is a better investment than real property.
Shaolin Crane
07-21-2014, 02:18 AM
I know someone who will buy that Cummins as is. Unlike Guy, he'd rather be Cummins than Stroke'n.

Who said i'd rather have a powerstroke than a cummins?
Shaolin Crane
07-21-2014, 02:21 AM
WTH is a front pump?

The front pump is what gives fluid to the torque converter and the rest of the transmission, when it starts to die, line pressure drops and you start the burn the clutches, once the clutch material gets in the fluid it kills the torque converter, the the valve body and blamo, no moe go.
Vettezuki
07-21-2014, 03:30 AM
Thanks for the explanation Guy. Another guess was solonoid. It is throwing a code, so I'll check that. It'd be nice if it was something relatively simple like that.

Adam, it's not going to be sold. Probably end up being a family heirloom. Only has like 150k miles, most of which are not especially hard. Should last just about forever with care.
Shaolin Crane
07-21-2014, 02:46 PM
Thanks for the explanation Guy. Another guess was solonoid. It is throwing a code, so I'll check that. It'd be nice if it was something relatively simple like that.

Adam, it's not going to be sold. Probably end up being a family heirloom. Only has like 150k miles, most of which are not especially hard. Should last just about forever with care.

Solenoid=Valve body
Throws a solenoid code when the fluid gets mucked up and the solenoid no longer fires, might get lucky with a fluid change and a solenoid body swap, but I doubt it. That trans is garbage.
enkeivette
07-21-2014, 11:08 PM
Who said i'd rather have a powerstroke than a cummins?

Your purchase tendencies.
Shaolin Crane
07-22-2014, 12:16 AM
Your purchase tendencies.

That is because of the truck, not the power plant. I'm my 7.3l ever dies it's getting a 24v