96 XJ AW4... Help..

[jtdesigns]

Driving home from school tonight my XJ just dropped gear.. Thats exactly what it felt like just dropped into neutral.

I could drop it down in first and it would go, but wouldnt change like normal at 5000 rpm. I keep getting a CEL for random misfire, so I pulled over checked fluid (OK), popped the batt cable (removed CEL), and seemed to fix it... Just wondering if anybody ever had this problem...

 

:dunno: :hmm: :dunno:

[Geonovast]

This is why I don't drive automatics.. :fs1:

[HOrnbrod]

Driving home from school tonight my XJ just dropped gear.. Thats exactly what it felt like just dropped into neutral.

I could drop it down in first and it would go, but wouldnt change like normal at 5000 rpm. I keep getting a CEL for random misfire, so I pulled over checked fluid (OK), popped the batt cable (removed CEL), and seemed to fix it... Just wondering if anybody ever had this problem... :dunno: :hmm: :dunno:

 

First thing I'd do is pull the pan and change the filter and look for any metal that shouldn't be there. The new fluid might help too. This could be something as simple as a band adjustment to a bad PCM. As you prolly know, 96 OBDII models don't have the separate TCU modules; all tranny functions are controlled by the PCM. When you cleared the code did it function/shift completely normally? What code did you get?

[jtdesigns]

Driving home from school tonight my XJ just dropped gear.. Thats exactly what it felt like just dropped into neutral.

I could drop it down in first and it would go, but wouldnt change like normal at 5000 rpm. I keep getting a CEL for random misfire, so I pulled over checked fluid (OK), popped the batt cable (removed CEL), and seemed to fix it... Just wondering if anybody ever had this problem... :dunno: :hmm: :dunno:

 

First thing I'd do is pull the pan and change the filter and look for any metal that shouldn't be there. The new fluid might help too. This could be something as simple as a band adjustment to a bad PCM. As you prolly know, 96 OBDII models don't have the separate TCU modules; all tranny functions are controlled by the PCM. When you cleared the code did it function/shift completely normally? What code did you get?

 

Yelp when I cleared the code it was good to go.. But the lights been on for the past three days. I have about 2 or 3 qrts of new GM Dextron III from another time it did it on me, and found the fluid was dark, and overfilled.

 

Thinking the CEL has something to do with it.. When the light is on it shifts weird. When you let off gas it kinda drops in gear, and as soon as your back on the gas it immediately upshifts. I didnt think to pull the code when it was acting up though..

 

I guess my nexy step it pull the pan and check for 11~15 ohms on the solenoids......

[Geonovast]

Call me :nuts: but..

 

CEL? :dunno:

[HOrnbrod]

Yelp when I cleared the code it was good to go.. But the lights been on for the past three days. I have about 2 or 3 qrts of new GM Dextron III from another time it did it on me, and found the fluid was dark, and overfilled.

 

Thinking the CEL has something to do with it.. When the light is on it shifts weird. When you let off gas it kinda drops in gear, and as soon as your back on the gas it immediately upshifts. I didnt think to pull the code when it was acting up though..

 

I guess my nexy step it pull the pan and check for 11~15 ohms on the solenoids......

 

Yeah, the CEL code prolly puts it into the OBDII "limp" mode to get you home. Err, do you have a code reader? What's the code mate?

 

AND, WTF is this in the Pub? This is a tech issue. Because it's a crappy 96 OBDII XJ?? Lot's of problemos w. them. I had one, constantly threw codes...... :D

[jtdesigns]

Yelp when I cleared the code it was good to go.. But the lights been on for the past three days. I have about 2 or 3 qrts of new GM Dextron III from another time it did it on me, and found the fluid was dark, and overfilled.

 

Thinking the CEL has something to do with it.. When the light is on it shifts weird. When you let off gas it kinda drops in gear, and as soon as your back on the gas it immediately upshifts. I didnt think to pull the code when it was acting up though..

 

I guess my nexy step it pull the pan and check for 11~15 ohms on the solenoids......

 

Yeah, the CEL code prolly puts it into the OBDII "limp" mode to get you home. Err, do you have a code reader? What's the code mate?

 

AND, WTF is this in the Pub? This is a tech issue. Because it's a crappy 96 OBDII XJ?? Lot's of problemos w. them. I had one, constantly threw codes...... :D

 

 

G.. CEL = Check Engine Light..

 

OBDII code 4-3 scanned is P300 Random Misfire.

 

Its in the pub because its not an MJ.

 

And yes its a crappy ol 96 XJ.. :D

 

Think the code is from heat soaked injectors.. Theres a TSB on it somewhere floating around.. Something about some sort of sleeve is put on the #3 injector..

 

Thats all I got man... The limp mode describes the odd shifting, but not the complete lack of gear switching.. :wall:

[HOrnbrod]

Think the code is from heat soaked injectors.. Theres a TSB on it somewhere floating around.. Something about some sort of sleeve is put on the #3 injector..

 

Thats all I got man... The limp mode describes the odd shifting, but not the complete lack of gear switching.. :wall:

 

Yeah, that TSP was a stop-gap measure that really didn't work in all cases. When they came out w. the 99+ intakes they got it right curing the injector heat soak issue by issuing yet another TSP that installed heat shield pictured below. I have that shield now on my 99+ intake (thanks Taz) and to date no issues. What this has to do w. your 96 I have no idea, but I don't think your tranny switching problems are caused by injector heat soak, unless that code triggers the limp mode. :cheers:

 

[Lemmon714]

I had a random misfire in my 96 dakota. The fix was rebuilding the fuel injectors- the regulator on the fuel pump disintegrated and clogged the filters in all the injectors.

 

If it were me, I would also look at the cap, rotor, wires, plugs, and coil. I am not sure how a transmission problem causes misfires.

 

I hate to endorse products- but I personally think that Amsoil is much better than Dexron in the AW4 when adding or changing fluid- if you need to go in that direction.

[jtdesigns]

I had a random misfire in my 96 dakota. The fix was rebuilding the fuel injectors- the regulator on the fuel pump disintegrated and clogged the filters in all the injectors.

 

If it were me, I would also look at the cap, rotor, wires, plugs, and coil. I am not sure how a transmission problem causes misfires.

 

I hate to endorse products- but I personally think that Amsoil is much better than Dexron in the AW4 when adding or changing fluid- if you need to go in that direction.

 

Yes injectors are my next step.. I guess I'll be getting my second set of Precision injectors...

 

This isn't my first rodeo,, I've replaced cap, rotor, wires, plugs, coil, tps, added two more grounds, tested cam sync sensor, cleaned TB, adjusted TV cable, replaced thermostat with mopar, and tested fuel pressure..

 

I don't think the tranny is causing the misfire, but the misfire is causing the shift weirdness.

 

And I thought the GM tranny fluid was expensive.... Amsoil... :eek: :eek: :eek: I only used the GM stuff because I had some left over from changing it in my Isuzu.

 

Its rainy here this whole week, so I doubt I'll do anything major about this yet.

 

Don I wonder if that shield will fit a 96... ??? :hmm:

[BLHTAZ]

AMSOIL may have a bigger price tag on it, but when you consider that it is - BAR NONE - the best protection that you can get and you will get nearly twice the life out of the fluid, it is actually cheaper in the long run. I have heard that some folks have reported tranny temps being reduced by 70 degrees after switching to AMSOIL, but that is just hear-say and not anything I can back-up with proof.

 

I agree with you that the shifting issue is likey a side effect of something else going on, not the other way around.