92westshady
NAXJA Forum User
- Location
- Newark, DE
Hi, I have a 2000 Cherokee with a 4.0L and an AW4 transmission and about 68K miles on the clock. I have noticed a couple funny quirks from time to time and I am wondering if they are common or a sign of a problem I should have checked out. If there are any transmission guys or anyone very familiar with AW4 transmissions on here, I would really appreciate your input and thoughts on my symptoms.
1. The first scenario occurs when cruising between 45-50mph on flat ground or slight downgrade. At this speed and situation the transmission upshifts as it seems it should so there is very little drag on the engine and RPMs are very low in the 1000-1200rpm range. What is funny is if I depress the throttle slightly to speed up as traffic pace increases the RPMs and my tach will jump up momentarily and then drop down again. So I sort of get a positive throttle response for a second then it drops off and I have to really depress the throttle further to maintain acceleration in the same gear or depress it much further to cause the transmission to downshift. Is this RPM jump normal, a sign of a transmission problem, or am I just paranoid?
2. The second scenario occurs again when cruising but this time at a slower pace in the 28-31mph range. Again at this pace RPMs are low. But this time when I step on the throttle I get a bit of an increase in RPMs but not much response and then the transmission sort of jumps into gear as if it was slipping for a second or had a delayed rough shift. Again is this normal quirky operation of the AW4, a sign of a transmission problem, or am I just paranoid?
Has anyone else experienced either of these issues?
I don't know if it is important to note that I have a high flow AEM DryFlow filter and intake tube, bored throttle body, Edge Products computer module and a Flowmaster 50 Series muffler and cat back exhaust installed. I also did change the transmission fluid about three months ago, using the correct fluid and I have checked the fluid several times since and it seems to be in the appropriate range.
Any input, ideas or experience would be appreciated.
Thanks,
Steve
1. The first scenario occurs when cruising between 45-50mph on flat ground or slight downgrade. At this speed and situation the transmission upshifts as it seems it should so there is very little drag on the engine and RPMs are very low in the 1000-1200rpm range. What is funny is if I depress the throttle slightly to speed up as traffic pace increases the RPMs and my tach will jump up momentarily and then drop down again. So I sort of get a positive throttle response for a second then it drops off and I have to really depress the throttle further to maintain acceleration in the same gear or depress it much further to cause the transmission to downshift. Is this RPM jump normal, a sign of a transmission problem, or am I just paranoid?
2. The second scenario occurs again when cruising but this time at a slower pace in the 28-31mph range. Again at this pace RPMs are low. But this time when I step on the throttle I get a bit of an increase in RPMs but not much response and then the transmission sort of jumps into gear as if it was slipping for a second or had a delayed rough shift. Again is this normal quirky operation of the AW4, a sign of a transmission problem, or am I just paranoid?
Has anyone else experienced either of these issues?
I don't know if it is important to note that I have a high flow AEM DryFlow filter and intake tube, bored throttle body, Edge Products computer module and a Flowmaster 50 Series muffler and cat back exhaust installed. I also did change the transmission fluid about three months ago, using the correct fluid and I have checked the fluid several times since and it seems to be in the appropriate range.
Any input, ideas or experience would be appreciated.
Thanks,
Steve