Transmission help!! - Page 2 - JeepForum.com

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post #16 of 26 Old 01-16-2013, 02:59 PM Thread Starter
mburton02
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Just found thanks to google..

"The Aisin Warner AW4 transmission is an automatic shift, four-speed overdrive transmission used in the 1987-2001 Jeep XJ Cherokee and MJ Comanche models. Its only year in the ZJ Grand Cherokee was 1993, and only with the six-cylinder."


Maybe I have an early 94, carryover 93 or whatever...


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post #17 of 26 Old 01-16-2013, 04:25 PM
Rich93ZJ
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So we have established what trans you have but the switches still seem pointless.
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post #18 of 26 Old 01-16-2013, 05:21 PM
ratmonkey
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Quote:
Originally Posted by mburton02 View Post
Just like in a daily driver tho, it I just shift the shifter into OD it starts out in first gear... my jeep obviously starts in first with the shifter in OD and the switches all off... if it wasnt in first it would have a tougher time taking off from a stop or whatever... i have driven in down the road with all switches off,, it runs, pulls, shifts fine... go to pull up on trailer without ramp and it wont

it still drives and shifts "normal" with shifter in OD and switches off.. for some reason, some how, some way it has more pulling power when the switch is flipped on 1st or 2nd... like something boosts like pressure or something..thats the only way i can think to say it that would make sense..
maybe it locks up the torque converter, but that's the only thing it can do. there's no "power boost" capability in a transmission or the ecu on these vehicles. the only thing i can say is you're probably not starting out in first like you assume you are.
Quote:
Originally Posted by mburton02 View Post
Just found thanks to google..

"The Aisin Warner AW4 transmission is an automatic shift, four-speed overdrive transmission used in the 1987-2001 Jeep XJ Cherokee and MJ Comanche models. Its only year in the ZJ Grand Cherokee was 1993, and only with the six-cylinder."


Maybe I have an early 94, carryover 93 or whatever...
it was only used in the first quarter of 93, you don't have a 95 or 94with one from the factory.
it's a somewhat popular swap.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #19 of 26 Old 01-16-2013, 07:02 PM
KoreaZJ
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Follow the switch wires... where are they connected or spliced in...?

If they control the solenoids, perhaps wired in near the TCM under the dash or solenoid harness underneath near the tranny.
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post #20 of 26 Old 01-17-2013, 07:34 AM Thread Starter
mburton02
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Quote:
Originally Posted by ratmonkey View Post
maybe it locks up the torque converter, but that's the only thing it can do. there's no "power boost" capability in a transmission or the ecu on these vehicles. the only thing i can say is you're probably not starting out in first like you assume you are.

it was only used in the first quarter of 93, you don't have a 95 or 94with one from the factory.
it's a somewhat popular swap.

With the shifter in OD and the swithes off it starts in 1st, without a doubt... I can drive it down the road and count the shifts. It shifts as stock

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post #21 of 26 Old 01-17-2013, 07:36 AM Thread Starter
mburton02
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Ill try to go look this weekend and see if I can see where the wires are running to...

Wrench......Play.....Break.....Repeat......
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post #22 of 26 Old 01-17-2013, 07:40 AM Thread Starter
mburton02
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Quote:
Originally Posted by Rich93ZJ View Post
So we have established what trans you have but the switches still seem pointless.
The switches arent pointless... without them flipped on I couldnt climb anyting... the transmission just does not have full power or hookup unless the shifter is in gear and the switches are flipped...

I have wheeled this thing prolly 5 full days since I got it.. it climbs up, thru, and over anything on the trail.. I always keep the shifter in OD and the switches in 1 or 2... If the shifter is in OD and the switches are off it wont pull itself onto the trailer let alone over anything on the trail!

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post #23 of 26 Old 01-17-2013, 02:02 PM
ratmonkey
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which makes zero sense unless it isn't starting in first, honestly. these transmissions have no "power boost" functionality. you really need to find out what they did with this thing.

http://www.stu-offroad.com/engine/awshift/awshift-1.htm

http://www.northjerseyjeepclub.org/s...Manual-Shifter

http://www.jeepforum.com/forum/f11/a...ite-up-273048/

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #24 of 26 Old 03-06-2013, 10:55 PM
USAXJ
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It sounds like the switches are routed to the TCM and lockout the gears through the solenoid. It's a pretty common upgrade for the aw4 as it sometimes likes to downshift while climbing.
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post #25 of 26 Old 03-07-2013, 11:45 AM
TheRealOldjeep
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Quote:
Originally Posted by Rich93ZJ View Post
So we have established what trans you have but the switches still seem pointless.
The switches force the trans to stay in a particular gear. Pretty common mod for the short wheel base crowd with swapped in AW4's. I had a setup like that with an electrical controller in my YJ (awshifting.com)

Chuck P
94 YJ 2.5L/AW4 (Gone)
98 ZJ Limited 5.2 - sons car
97 TJ 2.5L/30RH - daughters car


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post #26 of 26 Old 03-07-2013, 10:10 PM
USAXJ
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I've been thinking about doing that to my xj. It sometimes likes to shift at the most inopportune time. Charging a long hill or something it'll shift and I'll lose either traction or power. It looks like a pretty simple setup.
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