Last post on Oct 29, 2013 at 10:18 AM
You are in the Chevy Venture
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Chevrolet Venture, Transmission, Van
#17 of 68 Tranny Leak
Jan 04, 2008 (6:33 pm)
I have what appears to be a transmission fluid leak, however, the fluid level seems to be stable.
When my van was shifting, it would do a 'thunk' sound as it geared up, but that was only once in a while. Now that 'thunk' seems to have ended and the shifting is pretty smooth.
I'm wondering if perhaps there is another red fluid used aside from tranny fluid as I cannot seem to find where the leak is coming from exactly.
#18 of 68 Re: Tranny Leak [yadmit]
Jan 07, 2008 (6:53 pm)
That's exactly how mine started originally. I had what looked like a rust orange/red pile in my driveway about the size of 3 basketballs but the several occasions I put it in, they could never find a trans leak. Then all of a sudden it quit leaking and they tell me I have a trans leak. A month passes by before I put it in to get the trans fluid leak fixed, and they then tell me there is no leak. Go figure! Am I being taken or is it all just part of the process, the come and go of the leak, the come and go of the thunk. A couple months pass and the above start happening (post16) and well that post tells you the rest. I'm having no problems since it was fixed. Good luck.
#19 of 68 Re: Tranny Leak [nickelndime]
Jan 07, 2008 (7:06 pm)
Actually, turns out it was a coolant leak. The rad cap is shot. The coolant the last shop put in is actually about the same colour as tranny fluid. New cap, rad flush and few other odds and ends and it should be good to go.
Doesn't say much about the shop I took it to as I had a coolant flush there a few weeks ago. Guess they lost my business.
#21 of 68 Hard Jerking And Lack of Power
Jan 15, 2008 (10:17 pm)
I have a 2001 Venture. Just recently while driving at around 50mph and up it will start to jerk really hard every couple of seconds and hesite. If I push the acellerator it feels like it isn't getting any fuel. Just hesitates and jerks. If I slow down to below 50mph or so it will be fine. Also it doesn't do this while driving in the city. Only at higher speeds on the freeway.
Anyone with an answer to this problem? Thanks in advance Corey
#22 of 68 Re: Hard Jerking And Lack of Power [mudder1_2000]
Jan 17, 2008 (6:59 pm)
This one is hard to diagnose over the internet...I've never experienced anything like this on our Venture...
Is your check engine light on? Do you have access to a code scanner, if so you may be throwing a code that doesn't make the light come on (many trans codes are like that)
But I'm not sure its a trans problem, sounds like an ignition or fuel problem to me. Maybe a coil pack getting ready to poop out? Or possibly an injector dying? The PCM is probably storing information when this is happening which only a scanner could read. With a scanner, you could even check all of the engine/trans parameters in real time while you are driving, that would probably be the best way to get an answer unless you happen to find someone who had the exact same problem...
#23 of 68 Re: Hard Jerking And Lack of Power [442dude]
Jan 19, 2008 (8:24 am)
So I had my OBD codes pulled today and a total of 3 came up. They are
P1189 - Oil pressure switch circuit
p1626 - Theft system fuel enable
P1811 - Max adapter long shift.
The mechanic pulled one of the plugs and we discovered that they are the original plugs. Quite worn out. I am going to change the plugs and wires this weekend to see what that does. I still don't know how the plugs or wires would only cause a problem on the highway and cause my lights to dim. Anyone with more suggestions? My ears are open. Thanks
#24 of 68 Re: Hard Jerking And Lack of Power [mudder1_2000]
Jan 19, 2008 (10:58 am)
P1189 is probably a broken wire or bad connection in the oil pressure circuit. The sensor is located next to the oil filter...you may want to check and clean repair as necessary...not causing your hesitation problem
P1626 is a problem with your theft deterrent system...basically, there is an intermittent problem with the serial communications between the powertrain control module (PCM) and the body control module (BCM) This is also not causing your hesitation problem, its just a stored code that says that at least once, your car had trouble verifying that the correct key was being used to start it. If this was your problem, the van would start, run for 2 sec. and shut down. I wouldn't worry about this one...
P1811 - the long shift code is typically set when your pressure control solenoid is going bad in your transmission. About a $ 600 repair, its internal to the trans and an all to common failure on the Venture (and on the 4T65E trans in general)
The typical symptoms are harsh shifts at all speeds and a loud whine when the trans gets hot. You don't mention either so I'm guessing its not your problem. It may be as a result of your actual problem.
I don't think any of these 3 are indicative of what's going on. Without driving it I'm still thinking fuel or ignition issue. Change your plugs and wires like you said you were going to do and also change your fuel filter. Be prepared to let out a string of expletives as you try to get to the rear plugs... Also make sure that the terminals on the coils are squeaky clean when you replace the wires and coat them lightly with dielectric grease before you put on the new wires, you'll have to remove them to get to the rear lugs anyway so its a good time to check them out - if you've got a multimeter, check the resistance between the two towers on each (towers meaning where the wires connect to) the resistance should be 5000-7000 ohms - if its above or below, you've got a bad ignition coil...Hopefully you'll get rid of your problem...good luck
#25 of 68 Re: Hard Jerking And Lack of Power [442dude]
Jan 20, 2008 (8:52 am)
Thanks for the info. Your post has been the most informative one that I have recieved on a number of forums that I have posted on. Thanks again abd I will re-post after I change the components.
#26 of 68 Re: Hard Jerking And Lack of Power [442dude]
Apr 14, 2008 (5:34 pm)
You sound like you have dealt with these issues before, or are at least competent. My 2004 just started the thunking shift and the wind up "gear" noise as I drive. I would like to find acompetent shop in Cincinnati for transmission issues. My van has 58k on it and has never towed. I have noticed it is getting worse as it gets warmer. Any ideas?