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Old 04-09-2011, 12:54 PM   #1
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Trans problem

I have a big problem. On my way to work on the highway, when I would get on it, it would not go over 4k rpm after 65. And at a
stop if I got on it, it really didn't want to shift into the next gear. I had the trans fluid changed about 6 months ago and havnt had a problem. I just replaced the trans mount eairler this week and all was going fine. Am I screwed? If so how much does it cost for a rebuild? Help!!!

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Old 04-09-2011, 01:48 PM   #2
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Did you have the fluid AND filter changed, or just a flush done. Sounds like a clogged filter to me.

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Old 04-09-2011, 02:21 PM   #3
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Most likely just a flush, because when I took the trans skid off, no one had taken it off before. Is that all it could be, really?
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Old 04-09-2011, 04:10 PM   #4
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did it just happen once? ive seen an auto just get confused before. only happened once then never again for the next 30k miles
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Old 04-09-2011, 04:24 PM   #5
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this is the first time it's ever happened. But when i was on the side street trying to figure out what was going on, it was doing the same. I'm really hoping it's nothing too serious. Like most people, me and the wife live paycheck to paycheck.
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Old 04-09-2011, 06:25 PM   #6
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Well, you have a 4spd tranny which is different from my 3spd, but the first thing I would do is change the filter and fluid. It's a cheap fix that will hopefully get you straightened out.
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Old 04-09-2011, 06:42 PM   #7
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4k rpm? ive never had mine over 2500 lol i must not ride it hard enough :P
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Old 04-09-2011, 07:39 PM   #8
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Yeah the 4k rpm is when you get on the gas on the high way to pass someone and it drops out of OD. I just want everything to work out. Maybe I'll get lucky and be able to find a trans place that is open on sunday to change out the fluid and filter real quick.
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Old 04-09-2011, 08:00 PM   #9
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I haven't had one of those 42rh tranny's apart yet, but it does sound like a fluid / pressure problem. Does ur tranny fluid look frothy? I'm assuming it's full, checking the fluid level with the vehicle sitting on level ground, at operating temperature, with the engine running and trans in park. I don't mean to insult ur intelligence if u know how to do that, some ppl don't. If all is good there, then I'll agree with everyone else and say drop the pan and replace the fluid and filter. I know on some ford transmissions, it was possible to accidentally install 2 gaskets in the filter which placed the pickup too close to the pan sometime causing cavitation issues. I don't know if the same is true for Chrysler transmissions, but something to look out for. Maybe someone else here can chime in on procedures and precautions. Good luck and keep us informed.
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Old 04-09-2011, 09:37 PM   #10
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I don't take any advice as a insult. I'll check it after driving 35 miles home from work in the morning. I guess I'll take it as a good sign that I didn't hear any metal on metal noises. And also the fact that it didn't drop out of gear. It's putting my heart at ease the more I think about it, the more it could be the filter. I have 100500 miles on her, and to my knowledge the filter has never been changed.
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Old 04-09-2011, 09:51 PM   #11
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Sorry to hear that....I am old school, but I NEVER flush a transmission or change the fluid. People I know who have done so end up putting in a new one less than a year later. I know this doesn't help your current problem, but it might save you one in the future.
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Old 04-09-2011, 10:35 PM   #12
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I agree with the no flush idea, but I do like to change the fluid and filter every so often...
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Old 04-09-2011, 10:38 PM   #13
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I really can't afford a new one, I'm hoping that it's just the filter since it's never been changed.
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Old 04-10-2011, 02:12 AM   #14
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Ok so I was driving home from work and testing a few things on the highway. Something strange happened. When I would get on the gas hard and try to get it to rev up, when it would reach just past 4k rpm, the check engine light would blink on and off till I let off the gas for a second of two? What could this be?
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Old 04-10-2011, 09:02 AM   #15
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A misfire. Engine related problem, not transmission. Get someone to scan the code for u and tell us what it is.
Just FYI. I flush transmissions almost daily. The only rule I stick by is, if ur not having a problem, a transmission flush is good preventative maintenance. If u are having a problem, it can make it worse. Some people live by the rule to never flush it. Nothing wrong with that. I was the same way until I learned how they work and started rebuilding them. Now it's not a box of mystery. I can't honestly say that flushing a transmission adds a ton of life to it mainly bc there are so many variables that decide the life expectancy of a transmission. However, I can say that flushing a transmission doesn't hurt the life expectancy.
Back to ur problem, while typing this I'm having trouble remembering exactly what the problem was other than it wouldn't rev past 4k at 65mph and it didn't want to pull from a stop. I might be wrong, I have horrible short term memory. This might be more engine related than transmission related. Most of the time when a transmission has a problem, it's a problem. It doesn't come and go, do it a little then do it a lot. Those kinda symptoms fall under drivability and turn out to be engine related or transmission control (for computerized transmissions) and will generally set a DTC. I think the only thing the computer controls on ur transmission is torque converter lockup. Let us know what u come up with.
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Old 04-10-2011, 10:15 AM   #16
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So even though the check engine light didn't stay on (it just blinked on and off), it threw a code? I did the key thing and came up with P0455, and I know my gas cap is tight. It just feels like there is no power there any more. Do you think maybe she's only firing on 4 cylinders and not 6? Maybe I'll try spark plugs today and see what happens.
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Old 04-10-2011, 10:31 AM   #17
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Blinking light means "catalyst damaging event occurring" which typically means raw gas is going into the exhaust due to a misfire. That should set a code that will be stored in ur PCM. P0455 means large EVAP leak detected. Unless ur gas cap is missing or broken, I doubt that's it. Look for a hole or broken hose in the EVAP system which can also cause a vacuum leak that can cause drivability problem.
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Old 04-10-2011, 11:10 AM   #18
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This may sound like a dumb question, but where do I check for a broken hose of leak in the EVAP system?
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Old 04-10-2011, 11:22 AM   #19
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The code came on about a month ago then my gas cap wasnt tight, and I never took the battery cable off to clear it. Could it still be hanging around from that? Would you guys start with the spark plugs and coil packs for a engine miss fire? If that's what this is starting to sound like? Like I said she just feels like there is no power left in her.
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Old 04-10-2011, 11:33 AM   #20
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Have you changed out your fuel filter lately. Sounds like it's starving for gas or leaning out.
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Old 04-10-2011, 11:34 AM   #21
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I've never changed the fuel filter.
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Old 04-10-2011, 11:38 AM   #22
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Do you guys think I should just wait and take it to the stealership tomorrow before I go spending money on what I think may be wrong? I just want this fixed, it's my DD and I don't want to do any serious damage to it.
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Old 04-10-2011, 11:40 AM   #23
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The 4k and the not wanting to rev up are a signs of a plugged up cat.
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Old 04-10-2011, 11:59 AM   #24
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Is there a test they can do to tell me it's a plugged cat, without cutting it off. Because if that's the case I'll take it to a muffler shop and it'll be 10X cheaper than the stealership.
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Old 04-10-2011, 12:26 PM   #25
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You know the more I think about it, the more either a clogged fuel filter or cat fits perfectly. If it was a spark plug or coil pack and I had a miss fire, I would get a code. That's happened to me before. The cat fits better than the fuel filter only because to me it sounds like if exhaust gases cant get out, then they will back up and cause problems with the engine. Am I wrong, if so please tell me.
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Old 04-10-2011, 01:18 PM   #26
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I have seen coil packs giving the exact same symptoms that ur describing. Fuel filters are located in the tank and I don't replace them unless I'm replacing the pump. If u had a back pressure gauge, u could find out if u had a bad cat quick. Simply remove the upstream O2 sensor, install the gauge and if u have more than 1 psi, u got a cat problem. Another way is to simply drive around with the upstream O2 removed. It's not advised, will set a DTC and extremely loud, but if ur problem goes away, then u got a clogged exhaust. Best thing to do would be swap the coil pack out with a known good one. Got a friend near by?
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Old 04-10-2011, 02:22 PM   #27
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So I was in the driveway hunting around the jeep, and decided to start it up while leaving it in park and revving the engine. It went all the way to red line without a problem, so would this mean that the problem lies in the trans and not the coil pack or cat since it didn't do anything strange?
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Old 04-10-2011, 02:52 PM   #28
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That doesn't tell me a lot bc the engine isn't under a load. U could power brake it (put it in drive, hold ur foot tightly on the brake and hit the gas). Caution, this does heat up the transmission fluid and doing too much of this can damage ur torque converter. It won't rev up to 4k, but u might be able to run it up to 2k - 2.5k. Something might show it's ugly head. Cat problems might cause exhaust to glow red. Ignition coil problems might cause misfires. Doing this too much could create transmission problems, so use caution.
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Old 04-10-2011, 02:53 PM   #29
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Ok it's deff the trans not shifting properly. Went out to grab some beer and gave it full gas right off the line and it went to just under 5k no problem and shifted great. Then once I hit around 40-45, it wouldn't shift unless I let my foot off the gas.
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Old 04-10-2011, 02:55 PM   #30
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Quote:
Originally Posted by KalvinKlein View Post
So I was in the driveway hunting around the jeep, and decided to start it up while leaving it in park and revving the engine. It went all the way to red line without a problem, so would this mean that the problem lies in the trans and not the coil pack or cat since it didn't do anything strange?
Agree with the nail on this one. Revving while sitting still will not ever tell you much. How it responds under load will be totally different.

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