looking for a 8hp70 guru

I HATE the way my Jeep SRT holds 4th gear on decel... it will literally hold 4th until 5mph and then will not down shift again when pressing the gas pedal only to sound like a 1st time manual driver riding the clutch.

edit: when it sport or track it isnt as bad

Now my Durango RT on the other hand does not do this. looking at the trans map there are significant changes and though they are the same trans they have different differential gear ration and not sure if i can simply copy and paste from one to the other.

I fine with all the other gears just 4th drives me nuts. Is there anyone here that can help me with this change? it doesnt have to be from durango file, im just posting it for a comparision to the jeep. if someone can just help me get the trans to continue down shifting to say at least 3rd if not 2nd at lower speeds like that turning a corner that would be awesome.

thank you

Attachment 126375 Attachment 126376

Hello Monstar,

Basically all shift points (shift schedule) while driving in Auto-Drive are less aggressive (fuel economy, maybe). Also, Torque Converter opens quite early (according to Dodge, to increase comfort).

The way to fix it is:
- Shift Schedule
- Torque Converter
- Shift Pressure
- Torque Management (to mitigate shift elements stress)

In case you are interested, I do offer personalized remote tune support. To give a little background about me: I have 12y of experience tuning transmission for Gasoline and Diesel engines. For the good of for the bad, all 12y are with ZF transmission (8HP). I already worked with: drag race, dune race, daily drive upgrades (shift comfort, shift schedule, fuel economy), drifting, ...

Thanks.
Dodge Boy

Email: [email protected]

After trying for the last year to tune my own and even tried some of the big name tuners, I finally have the perfect tune thanks to Dodge Boy. I also wanted increased engine braking during downshifting all the way to 1st gear and zero MPH.

Quote:

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Originally Posted by EVguy1

After trying for the last year to tune my own and even tried some of the big name tuners, I finally have the perfect tune thanks to Dodge Boy. I also wanted increased engine braking during downshifting all the way to 1st gear and zero MPH.

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That is good to hear. I am having trans tune issues and may go to him in the spring when I get my car out of storage.

Quote:

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Originally Posted by Monstar

I HATE the way my Jeep SRT holds 4th gear on decel... it will literally hold 4th until 5mph and then will not down shift again when pressing the gas pedal only to sound like a 1st time manual driver riding the clutch.

edit: when it sport or track it isnt as bad

Now my Durango RT on the other hand does not do this. looking at the trans map there are significant changes and though they are the same trans they have different differential gear ration and not sure if i can simply copy and paste from one to the other.

I fine with all the other gears just 4th drives me nuts. Is there anyone here that can help me with this change? it doesnt have to be from durango file, im just posting it for a comparision to the jeep. if someone can just help me get the trans to continue down shifting to say at least 3rd if not 2nd at lower speeds like that turning a corner that would be awesome.

thank you

Attachment 126375 Attachment 126376

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You should be able to take the scheduling tables from the durango and copy to the jeep
All the shift mapping is done based on output shaft speed, so the final drive ratio doesnt really make a difference

Im used to the ram transmission tuning so 95% of normal driving without cruise or tow mode is map 0, 5 or 10
Looking at your maps it seems to use all the tables, but map 5 has really low speed downshift points. Id start with that one

PM sent to dodgeboy