• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Dodge, Jeep and RAM Forum dedicated to FCA owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the SRT Forum today!


MY TRANSMISSION REPAIR 8hp90

OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #561
I’m doing it on the cheap this trip a friend is meeting me at the shop at 7:30 with his car hauler
 


SilverBillet

4000 Posts Club
Founding Member
Donating Member
Member ID
#1009
Messages
4,275
Reactions
14,751
Likes
252
City
The Villages
State
FL
Country
United States
Vehicle
2021 Jeep GC 5.7 TrailHawk
(y)When are you going?
 


OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #563
I’m leaving out sometime tomorrow I haven’t decided what time but hopefully around noon I’ll be driving back Monday or Tuesday
 


Speedy!

Infomercial Producer
Staff Team
Founding Member
U.S. Marine Veteran
9 Second Best E/T
HFCOTM & HFCOTY
Member ID
#1070
Messages
6,581
Reactions
16,878
Likes
402
City
Interwebs
State
TN
Country
United States
Vehicle
Demon 170
Be careful how hard it shifts you don’t want it breaking parts as well , and I doubt you will ever figure it out completely because there is too many shift schedules in it I’m headed to Bradenton to test my transmission out but I have tried it in the street somewhat and it’s beast mode I feel pretty confident it will perform as planned , by the way if anyone is in my area and wants to tag along let me know because 14 hours is a long trip
Great advice I think. Mike trained me not to exceed factory maximums, so for example if sport had the highest shift pressure then you could technically apply that pressure to perf and normal but you've never exceeded the factory setting technically. That's how I set mine up.....I basically did a lot of analysis and blended the various modes so they're basically all the same to take the variability out. Since I'm making a bit more mojo than a Demon or RE I also reviewed the torque mgmt during upshift the factory had in place and made some adjustments there as well. I've learned this will also help speed the shift.
 


Speedy!

Infomercial Producer
Staff Team
Founding Member
U.S. Marine Veteran
9 Second Best E/T
HFCOTM & HFCOTY
Member ID
#1070
Messages
6,581
Reactions
16,878
Likes
402
City
Interwebs
State
TN
Country
United States
Vehicle
Demon 170
Do any wires have to be cut on the factory harness to install the dual pump setup?
 


OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #566
Yes at the pump itself and also at the fpdm
 


OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #567
Why you asking speedy you going ethanol
 


Hpindy

4000 Posts Club
Founding Member
9 Second Best E/T
HFCOTM
Member ID
#974
Messages
4,875
Reactions
11,023
Likes
302
City
Jackson's Point
State
Non-US
Country
Canada
Vehicle
2018 challenger hellcat
Yes at the pump itself and also at the fpdm
I have the same set up . I cut the wires so I could put it back if needed .

Sent from my BBF100-2 using Tapatalk
 


OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #569
There’s no going back just forward
 


Speedy!

Infomercial Producer
Staff Team
Founding Member
U.S. Marine Veteran
9 Second Best E/T
HFCOTM & HFCOTY
Member ID
#1070
Messages
6,581
Reactions
16,878
Likes
402
City
Interwebs
State
TN
Country
United States
Vehicle
Demon 170
I'm always thinking what's next.
 


OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #571
I'm always thinking what's next.
Someone getting an itch sounds like
 


FFBOS

500 Posts Club
Founding Member
9 Second Best E/T
Member ID
#1008
Messages
692
Reactions
1,180
Likes
132
City
Mount Prospect
State
IL
Country
United States
Vehicle
2016 Hellcat Charger
I'm hoping mine will last a little while. I've bumped shift pressures and it's shifting much more firm now. Maybe not needed at my power level, but better safe than sorry.

Now, someone needs to figure out when shift ID 28 and 29 are used. These are from a STOCK Redeye calibration! Found the same 6700 RPM shift points in the Demon cal as well. The conspiracy theorist in me wonders if there's some Easter egg deal like paddle down twice, paddle up twice, and hit the brake pedal for three seconds to enable these and that's how the Demon got the 9.65. In the Demon cal they're mapped to a manual paddle mode.

View attachment 8523

Those might be for launching the car with its "two-step" since you have to use paddles. Not sure.
 


Hpindy

4000 Posts Club
Founding Member
9 Second Best E/T
HFCOTM
Member ID
#974
Messages
4,875
Reactions
11,023
Likes
302
City
Jackson's Point
State
Non-US
Country
Canada
Vehicle
2018 challenger hellcat
There’s no going back just forward
I know right ...... Who am I kidding

Sent from my BBF100-2 using Tapatalk
 


Member ID
#1651
Messages
92
Reactions
196
Likes
27
City
Suwanee
State
GA
Country
United States
Vehicle
2016 Challenger Hellcat
I'm hoping mine will last a little while. I've bumped shift pressures and it's shifting much more firm now. Maybe not needed at my power level, but better safe than sorry.

Now, someone needs to figure out when shift ID 28 and 29 are used. These are from a STOCK Redeye calibration! Found the same 6700 RPM shift points in the Demon cal as well. The conspiracy theorist in me wonders if there's some Easter egg deal like paddle down twice, paddle up twice, and hit the brake pedal for three seconds to enable these and that's how the Demon got the 9.65. In the Demon cal they're mapped to a manual paddle mode.

View attachment 8523
It’s all on the tcm shift schedule tab. Just need to dig lil bit and you would find it

also, fuel cut off at 6500 for those cars.
 


Last edited:

MaxCarnage

500 Posts Club
Founding Member
10 Second Best E/T
HFCOTM
Wiki Contributor
Member ID
#979
Messages
500
Reactions
799
Likes
182
City
Spokane Valley
State
WA
Country
United States
Vehicle
19' Redeye
HFCOTM
View Images

FFBOS

500 Posts Club
Founding Member
9 Second Best E/T
Member ID
#1008
Messages
692
Reactions
1,180
Likes
132
City
Mount Prospect
State
IL
Country
United States
Vehicle
2016 Hellcat Charger
OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #577
It’s not true plug n play but easy to install
 


FFBOS

500 Posts Club
Founding Member
9 Second Best E/T
Member ID
#1008
Messages
692
Reactions
1,180
Likes
132
City
Mount Prospect
State
IL
Country
United States
Vehicle
2016 Hellcat Charger
It’s not true plug n play but easy to install
Just have to address the fuel sensor wires, which is two connections.
 


curt_dusterhofftuning

Member
Vendor
Founding Member
Member ID
#1146
Messages
61
Reactions
116
Likes
17
City
Big Canoe
State
GA
Country
United States
I sell the tapped one now because it's plug and play and includes a filter. Had a lot of customers mess up installs on the injected kit because of the splicing needed. The injected one does now include the 285 pumps though just fyi.
 


OP
hellno

hellno

3000 Posts Club
8 Second Best E/T
HFCOTM
Member ID
#1308
Messages
3,326
Reactions
5,815
Likes
302
City
memphis
State
TN
Country
United States
Vehicle
2016 challenger hellcat
Thread Starter #580
Well that fu::;;King sucks , wish I’d known this before 😂😂😂
 




Top