A604 Problem
#1
10-14-2010, 02:47 PM
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A604 Problem
Hi everyone, I have an A604 with a 3.3 engine, its in a dynasty not a caravan but I posted here because they seem to be mostly the same.
Edit: It's a 1990 btw, 192 000k
It had a small amount of dexron and some lucas additive in it for a while and it started going into limp mode whenever it shifted into 4th gear. I had a flush done with the correct fluid which mostly fixed the problem.
It still goes into limp mode if I hover around 50kph which is exactly where it shifts into 4th, it also does the same thing if I accelerate too hard past 50 and it shifts into 4th later than normal, or if I let the car coast into 4th gear. If I accelerate gently into 4th it seems like it tries to shift 2 or 3 times before it actually gets into gear properly, but it does work.
The up-shift between 2nd and 3rd also hestitates and slips for a couple of seconds before it actually shifts into gear.
I have also been experiencing some slipping in first, which I am assuming is the clutch for that gear.
Could the shifting problem be due to a gunked up solenoid pack from using the wrong fluid and the additive? I am not so worried about the slipping in first as it has only really happened once or twice but I would like to fix the shifting problems if I can.
I can easily change the solenoid pack, I just don't want to drop 300 bucks on a new one until I am fairly sure that's the problem.
I am also considering a rebuild kit for the clutches, would that fix the problem.
Thanks in advance for any help and sorry for the long post.
Edit: One other thing I forgot to mention is when doing highway speeds (100k) the car slows down quite rapidly if I take my foot off the gas. It's almost like it's missing the overdrive gear but I don't think it is cause driving with overdrive off, the engine braking effect becomes noticable at around 50, when the overdrive gear would normally kick in.
Edit: It's a 1990 btw, 192 000k
It had a small amount of dexron and some lucas additive in it for a while and it started going into limp mode whenever it shifted into 4th gear. I had a flush done with the correct fluid which mostly fixed the problem.
It still goes into limp mode if I hover around 50kph which is exactly where it shifts into 4th, it also does the same thing if I accelerate too hard past 50 and it shifts into 4th later than normal, or if I let the car coast into 4th gear. If I accelerate gently into 4th it seems like it tries to shift 2 or 3 times before it actually gets into gear properly, but it does work.
The up-shift between 2nd and 3rd also hestitates and slips for a couple of seconds before it actually shifts into gear.
I have also been experiencing some slipping in first, which I am assuming is the clutch for that gear.
Could the shifting problem be due to a gunked up solenoid pack from using the wrong fluid and the additive? I am not so worried about the slipping in first as it has only really happened once or twice but I would like to fix the shifting problems if I can.
I can easily change the solenoid pack, I just don't want to drop 300 bucks on a new one until I am fairly sure that's the problem.
I am also considering a rebuild kit for the clutches, would that fix the problem.
Thanks in advance for any help and sorry for the long post.
Edit: One other thing I forgot to mention is when doing highway speeds (100k) the car slows down quite rapidly if I take my foot off the gas. It's almost like it's missing the overdrive gear but I don't think it is cause driving with overdrive off, the engine braking effect becomes noticable at around 50, when the overdrive gear would normally kick in.
Last edited by brewed4you; 10-14-2010 at 05:19 PM.
#2
10-15-2010, 10:38 PM
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Welcome to DF
The fluid would give you a shudder not slipping. From what you have been saying,the transmission maybe going into limp in. How is the fluid condition? And by the way,they are the same transmission.What i need to know,is there any transmission codes and what is the CVI on the OD clutch pack. If its 150 or more,thats not good.
The fluid would give you a shudder not slipping. From what you have been saying,the transmission maybe going into limp in. How is the fluid condition? And by the way,they are the same transmission.What i need to know,is there any transmission codes and what is the CVI on the OD clutch pack. If its 150 or more,thats not good.
#3
10-16-2010, 02:38 PM
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I already changed the fluid, it was causing a shudder before I flushed it though.
The fluid was in good shape because it was flushed maybe a month ago, now it is starting to burn because of the slipping clutch which I just noticed a few days ago.
I am trying to find someone with a code reader, I won`t take it to Dodge because they want $125 to do it, which is bull****, and I`m 19 with a $10 an hour job...
How would I check the CVI? Is there a cheap way to do this myself?
And I think, it's the UD clutch since it only seems to slip through gears 1 and 2. I'm no expert on this though.
The fluid was in good shape because it was flushed maybe a month ago, now it is starting to burn because of the slipping clutch which I just noticed a few days ago.
I am trying to find someone with a code reader, I won`t take it to Dodge because they want $125 to do it, which is bull****, and I`m 19 with a $10 an hour job...
How would I check the CVI? Is there a cheap way to do this myself?
And I think, it's the UD clutch since it only seems to slip through gears 1 and 2. I'm no expert on this though.
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10-18-2010, 12:58 PM
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#6
10-18-2010, 05:43 PM
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Okay, I just got the codes and CVI's checked.
It's throwing a code 46, which is a 3-4 shift abort, and a code 39 which is gear ratio error. Keep in mind it only does this shift abort if I either coast into 4th or accel hard into 4th.
CVI's are 64 for the LR, 168 for the OD which is obviously screwed, 49 for the 2-4, and 44 for the UD.
It appeared to slip in first but the guy I took it to said it was probably just in limp mode and I didn't notice.
Edit: I just read that this is due either to a broken overdrive pressure plate, or a burned up OD clutch. So an overhaul should fix this right?
Would you be able to give me a list of tools that are absolutely essential for overhauling this transmission?
It's throwing a code 46, which is a 3-4 shift abort, and a code 39 which is gear ratio error. Keep in mind it only does this shift abort if I either coast into 4th or accel hard into 4th.
CVI's are 64 for the LR, 168 for the OD which is obviously screwed, 49 for the 2-4, and 44 for the UD.
It appeared to slip in first but the guy I took it to said it was probably just in limp mode and I didn't notice.
Edit: I just read that this is due either to a broken overdrive pressure plate, or a burned up OD clutch. So an overhaul should fix this right?
Would you be able to give me a list of tools that are absolutely essential for overhauling this transmission?
Last edited by brewed4you; 10-18-2010 at 05:54 PM.
#7
10-18-2010, 08:45 PM
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#8
10-19-2010, 10:56 AM
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You definitely know your stuff man, thanks.
I have a manual that details how to rebuild the transmission but I can't find a good list of what tools I will need. I have access to a full set of wrenches and sockets, as well as a torque wrench. What other tools will I need to pull off an overhaul?
I have a manual that details how to rebuild the transmission but I can't find a good list of what tools I will need. I have access to a full set of wrenches and sockets, as well as a torque wrench. What other tools will I need to pull off an overhaul?