Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Just curious if it is possible to add a comfort/power button for the trans to a 95 XJ? Not sure if it would need a different control box or what, if you could just wire it up and all...thanks!
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95 XJ - Way to add comfort/power button for trans?
- Thread starter Blaine B.
- Start date
Big Red
NAXJA Forum User
- Location
- Roscoe, IL 61073
I've really only seen these used in the Renix 4.0Ls 87-90'. I had one in my 1st XJ my 89' 2 dr AW4/242
You might be able to duplicate this with a computer chip or a control module. I think they make one for your year. I rarely messed with this option on my 89'. You will see a lot in a auto trans by how heavy or light your right foot is on the skinny pedal anyways. If I were you I'd get the performance chip and/or Brett's shift kit so you can shift when you want with the turn of a rotary switch, or his bling bling paddles, video game joy stick etc.
Troy
You might be able to duplicate this with a computer chip or a control module. I think they make one for your year. I rarely messed with this option on my 89'. You will see a lot in a auto trans by how heavy or light your right foot is on the skinny pedal anyways. If I were you I'd get the performance chip and/or Brett's shift kit so you can shift when you want with the turn of a rotary switch, or his bling bling paddles, video game joy stick etc.
Troy
5-90
NAXJA Forum User
- Location
- Hammerspace
You would probably have to graft in a RENIX TCU - but the HO was hardwired into the "Power" setting anyhow. Since the Power setting also firms up the shifts somewhat, it is also good for causing less wear on the clutches in the transmission, which is probably why it was done that way. The "Power/Comfort" toggle is a silly idea, and I'll usually hardwire it into "power" myself and just use the toggle for something else (like auxiliary lighting...)
5-90
5-90
BrettM
NAXJA Forum User
- Location
- michifornia
it's hardwired into Power, the Comfort setting is useless in my opinion, so just forget about it.
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Ah, I was just curious anyway. Easing off of the pedal and keeping it below 2200 RPM only gains me 2 tenths of a MPG, btw :music:
90xj06
NAXJA Forum User
- Location
- Peabody, MA
the confort is all messed up. it newer works right and it shifts alot at 40 mph.
Big Red
NAXJA Forum User
- Location
- Roscoe, IL 61073
Take control of your AW4 with Brett's kit...that is all. 
langer1
NAXJA Forum User
- Location
- Mineral City,Ohio
The older Power Comfort switch should have been name "Power" or 'Economy".
My 87 gets 4 mpg more in comfort mode.
18 power. 21 comfort mode
My 87 gets 4 mpg more in comfort mode.
18 power. 21 comfort mode
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Is that highway or city?
Splendid mileage eiter way!
Splendid mileage eiter way!
90xj06
NAXJA Forum User
- Location
- Peabody, MA
i get like 4 mpg all the time i think i need a sync sensor in the disco.
Matthew Currie
NAXJA Member #760
- Location
- Vermont, land of big clay
Like Langer, I noticed an actual difference in my 87. I averaged about 23 in daily driving (mostly rural).
BrettM
NAXJA Forum User
- Location
- michifornia
the comfort/power switch shouldn't affect highway mileage at all since it only changes the shift points, but I am very suprised to hear how much difference it is making around town.
Oizarod115
NAXJA Forum User
- Location
- Atlanta, GA
my brothers 90 also gets way better mileage in comfort than power. up hills one tap of the power button its a huge difference.
DansGreyMj
NAXJA Forum User
- Location
- Nuevo, Ca
what yrs did they use those cuz i heard it was up til like 91 but my couzins 95 had it from the factory
Somebody have to give it a try...
Here's the TCU wiring for the 88XJ/MJ and 93XJ.
On the trucks without Power Switch there is constant 12v to the TCU's pin C11 (ignition on)
As fare as I can see, the only thing to do is to cut the tan wire from TCU pin C11 and install a switch w/control light.
-93 without
-88 with power switch.
Here's the TCU wiring for the 88XJ/MJ and 93XJ.
On the trucks without Power Switch there is constant 12v to the TCU's pin C11 (ignition on)
As fare as I can see, the only thing to do is to cut the tan wire from TCU pin C11 and install a switch w/control light.
-93 without
-88 with power switch.
Runnin'OnEmpty
NAXJA Forum User
- Location
- Southeast USA
My 89 got 25 mpg on a highway trip once, in comfort mode. My 96 dosen't get anywhere near that mileage, and the shift points are at a higher rpm. Surely the power/comfort switch can't be the reason.....?
Someone needs to do this mod (breaking the #11 pin circuit), and report back to us less adventurous individuals.....
Someone needs to do this mod (breaking the #11 pin circuit), and report back to us less adventurous individuals.....
Runnin'OnEmpty
NAXJA Forum User
- Location
- Southeast USA
I think it would be, according to the posted wiring diagrams. I always ran my 89 in the "comfort" mode, and it seemed to shift quicker at a lower rpm than my 96. (Under normal driving conditions.)
cap269
NAXJA Forum User
- Location
- Montgomery, AL
Just a side note... on my '96 sport, there is no wire connected to TCU C11. The spot on the connector is empty. So, I guess the hardwiring is actually inside the controller for my model. If that is so, would one be able to just use a controller from a diff year? Say, from a 1988? And then just add the wire to the connector at C11 and run it to the switch? Hmmm...
