transmission power or comfort switch 89 xj - JeepForum.com
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post #1 of 16 Old 03-02-2015, 01:31 PM Thread Starter
1989Cherokee4L
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transmission power or comfort switch 89 xj

Hi, yes been told that I must have the power mode switched on for the transmission, but what function does this provide please and how does it affect the transmission, power or comfort, what happens when I switch either on?

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post #2 of 16 Old 03-02-2015, 04:13 PM
austin6137
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Changes the shift points of the trans. Nothing special

90 - xj laredo- 4.5" rough country lift, 6.5" of total lift with drop brackets, zj disc brakes on c8.25, olympic winch bumper, jcr upper and lower quarter armor, IRO hack-n-tap and rock sliders and rear bumper. rugged ridge 8500lb winch. Spartan locker up front. With a jd yellow paint job, 97+ front end and bushwacker cut out flares. 35's
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post #3 of 16 Old 03-02-2015, 05:15 PM
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Quote:
Originally Posted by austin6137 View Post
Changes the shift points of the trans. Nothing special
Yep. And it performs better in Power mode. Factory made that mode standard in mid 91 or so.

Does your switch light up when Power is selected?

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post #4 of 16 Old 03-02-2015, 07:51 PM
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In comfort mode it softens the shifts by using less pressure to shift . This will cause premature transmission failure .

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post #5 of 16 Old 03-02-2015, 09:13 PM
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Originally Posted by skyway0018746 View Post
In comfort mode it softens the shifts by using less pressure to shift . This will cause premature transmission failure .
Pressure is controlled by the TV cable. No problems with premature trans failure on one of the best, if not THE best automatic transmissions ever developed.

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post #6 of 16 Old 03-03-2015, 11:53 AM Thread Starter
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Thanks, yes the power light comes on on the switch, when switched on, not sure I notice any difference up and down gears or kick down. Pretty fed up with modern cars pulling out of side roads in front of me on 50 mph roads I use, just seems easier to overtake than brake where possible.
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post #7 of 16 Old 03-03-2015, 01:36 PM
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Originally Posted by 1989Cherokee4L View Post
Thanks, yes the power light comes on on the switch, when switched on, not sure I notice any difference up and down gears or kick down. Pretty fed up with modern cars pulling out of side roads in front of me on 50 mph roads I use, just seems easier to overtake than brake where possible.
The switch could be bad inside. Here's what I do:

Bypassing the Power/Comfort Switch on a Renix Jeep

Remove and unplug the switch. In the harness are 3 wires One has a stripe, one is tan, and the other black. Make a 4" jumper wire with a male spade at each end. Plug one end in the cavity for the tan wire and the other in the cavity for the striped wire and you'll be in permanent Power mode. Stuff the harness back in and reinstall the switch for looks.

If you happen to have a 91 or 92 XJ/MJ and it has the Power/Comfort switch, just jumper the Tan and Blue wires in the harness plug.

NEVER include the black wire when jumpering!!!
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Power Comfort Jumper.jpg  

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post #8 of 16 Old 03-09-2015, 10:07 AM Thread Starter
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Quote:
Originally Posted by cruiser54 View Post
The switch could be bad inside. Here's what I do:

Bypassing the Power/Comfort Switch on a Renix Jeep

Remove and unplug the switch. In the harness are 3 wires One has a stripe, one is tan, and the other black. Make a 4" jumper wire with a male spade at each end. Plug one end in the cavity for the tan wire and the other in the cavity for the striped wire and you'll be in permanent Power mode. Stuff the harness back in and reinstall the switch for looks.

If you happen to have a 91 or 92 XJ/MJ and it has the Power/Comfort switch, just jumper the Tan and Blue wires in the harness plug.

NEVER include the black wire when jumpering!!!
Thanks I will have ago at making, the jummper wire looks heavy duty voltage where could I obtain wire same spec?
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post #9 of 16 Old 03-09-2015, 03:26 PM
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Thanks I will have ago at making, the jummper wire looks heavy duty voltage where could I obtain wire same spec?
Needs not be any larger than the wires at the plug.

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post #10 of 16 Old 03-22-2015, 06:07 PM
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Not to hack this thread but I am having problems with shifting. It acts like no vacuum mod. on the old C6 transmissions. Unless I manually shift it goes up so quick I have no power. I found the vacuum line disconnected and still working that part but could this failed switch also cause some of it? Still figuring out how this thing shifts.
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post #11 of 16 Old 03-22-2015, 07:36 PM
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Quote:
Originally Posted by mtnsammy View Post
Not to hack this thread but I am having problems with shifting. It acts like no vacuum mod. on the old C6 transmissions. Unless I manually shift it goes up so quick I have no power. I found the vacuum line disconnected and still working that part but could this failed switch also cause some of it? Still figuring out how this thing shifts.
It doesn't need vacuum to shift. Start a new thread to get more help. Or search .

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post #12 of 16 Old 03-22-2015, 09:30 PM
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Quote:
Originally Posted by mtnsammy View Post
Not to hack this thread but I am having problems with shifting. It acts like no vacuum mod. on the old C6 transmissions. Unless I manually shift it goes up so quick I have no power. I found the vacuum line disconnected and still working that part but could this failed switch also cause some of it? Still figuring out how this thing shifts.
Which vacuum line? This tranny relies on NO vacuum input for shifting. Only the TPS and Power/Comfort switch. The harshness or firmness of shifts is regulated by the tV cable.

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post #13 of 16 Old 03-24-2015, 10:04 AM
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Speedometer work? I had a c6 so I know what u mean. It's just shifting thru the gears quickly with no kind of variation with the throttle
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post #14 of 16 Old 12-30-2016, 09:29 PM
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Does the gas mileage go down in power mode.
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post #15 of 16 Old 12-31-2016, 07:11 AM
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Originally Posted by mattrowe View Post
Does the gas mileage go down in power mode.

Not a bit. Might even go up.


http://cruiser54.com/?p=435

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