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Unread 01-28-2013, 03:41 AM   #1
AVR2
Web Wheeler
1993 ZJ 
 
Join Date: Apr 2007
Location: UK
Posts: 2,215
AW4 transmission - late shifts when cold

When my AW4 is cold, it takes anything from five to ten seconds to find the gear when going from P to R (which is always my first gearshift when starting in the morning). It also suffers from late shifting from 1 to 2 while cold, and I typically have to lift off the throttle before it will shift (sometimes I have to do this two or three times before I get the first 1-2 shift). Once it's warmed up, everything's fine.

Just to be clear, the trans fluid is recent (I drained and refilled 5 times over a couple of weeks so hopefully there is no old fluid left) and the TV cable is correctly adjusted. I'm assuming that it's just a case of the trans being old, tired and in need of a rebuild, but I thought I'd ask just in case anyone can suggest any cheaper possibilities for a fix, such as solenoids or whatever.

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Unread 01-28-2013, 07:29 AM   #2
Mark05059
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1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
Posts: 4,300
let it warm up before heading out.. trans in gear transfer case in neutral and wheels blocked. Idling to "warm it up" does nothing in getting the transmission warm.
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Unread 02-19-2013, 10:09 AM   #3
davidmatlack
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1996 ZJ 
 
Join Date: Aug 2012
Location: rocky mount, nc
Posts: 131
Tranny Relay in Power Mgmt Box?

I just replaced this at 254k and feel the tranny is responding faster and smoother. I wasn't having any probelms with it but had just replaced the relay for the AC clutch which was acting up.

best
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Unread 02-19-2013, 03:59 PM   #4
jnowak
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1993 ZJ 
 
Join Date: Nov 2011
Location: dahlonega, ga
Posts: 466
Quote:
Originally Posted by AVR2 View Post
When my AW4 is cold, it takes anything from five to ten seconds to find the gear when going from P to R (which is always my first gearshift when starting in the morning). It also suffers from late shifting from 1 to 2 while cold, and I typically have to lift off the throttle before it will shift (sometimes I have to do this two or three times before I get the first 1-2 shift). Once it's warmed up, everything's fine.

Just to be clear, the trans fluid is recent (I drained and refilled 5 times over a couple of weeks so hopefully there is no old fluid left) and the TV cable is correctly adjusted. I'm assuming that it's just a case of the trans being old, tired and in need of a rebuild, but I thought I'd ask just in case anyone can suggest any cheaper possibilities for a fix, such as solenoids or whatever.
It's a different tranny put same problem. My c6 does that and its a internal leak somewhere in the pump/tc. Over nite the pump/tc drains and has to fill back up. Is there a big thud/jerk when it does go into gear?
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Unread 02-19-2013, 04:20 PM   #5
larry33
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Join Date: Feb 2013
Posts: 1
Quote:
Originally Posted by AVR2
When my AW4 is cold, it takes anything from five to ten seconds to find the gear when going from P to R (which is always my first gearshift when starting in the morning). It also suffers from late shifting from 1 to 2 while cold, and I typically have to lift off the throttle before it will shift (sometimes I have to do this two or three times before I get the first 1-2 shift). Once it's warmed up, everything's fine.

Just to be clear, the trans fluid is recent (I drained and refilled 5 times over a couple of weeks so hopefully there is no old fluid left) and the TV cable is correctly adjusted. I'm assuming that it's just a case of the trans being old, tired and in need of a rebuild, but I thought I'd ask just in case anyone can suggest any cheaper possibilities for a fix, such as solenoids or whatever.
I had the exat same problem in my 95 zj. I added the lucas stop slip/leak fluid. Over the last 2 weeks i has gotten almost back to normal
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