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Posts posted by vnb282
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2 minutes ago, ttocs said:
The first thing that pops into my head when a trans "slips" (no movement) then "bangs" into gear is old/dirty fluid and/or low fluid. Changing fluid only removes a percentage of the old, which is why I asked about if the old fluid was checked for color to see if maybe it was burnt.
When that's not the case, then maybe a valve body issue, or electrical, or maybe vacuum. I echo getting a Durametric, it's very useful.
I'm curious if this problem can be diagnosed with some exercises and observations . . .
While the car is standing with the brakes engaged - in Park, Neutral, and Drive, at what rpm does the engine idle?
Does this issue manifest when rpm -while stopped - is above or below 1000rpm?
While brake is engaged can you feel the car wanting to move if you press the throttle a little?
Was the car ever able to creep at idle with the original trans?
If you rev the engine a little while in Neutral, then immediately upon returning to idle shift into Drive, does problem remain? or does Drive engage?
While driving, when coming to a stop can it be down-shifted Manually into 1st and then operate normally?
While in Drive, stopped, shift into Manual and 1st gear, does it thump?
When i first bought the used transmission i immediately removed the cover and the oil was not dirty at all, it was actually still pretty red. The oil was dumped out and i installed a new filter and gasket. Took the truck to the mechanic and he did say the oil in the old transmission was really dirty.
I actually took the Cayenne to a Porsche dealer here in Downtown LA to see if they can manage to figure out what the issue is.
In the morning when i would start the car it would have no problem when i step on the gas, once I was driving it when i would come to a complete stop at the light i would then try to step on gas and it wouldn't go anywhere. Once you hold the gas at about 1.5-2 RPM it would start to go. There was times i tried to leave it drive to see if it would just move after several seconds but it didn't. It does the same thing when I use the Tip-Tronic. Once the car starts moving there is no problem with the car accelerating and stay in gears.
I do remember on one occasion i was on some incline and the car started rolling back.
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I would take it back to get the fluid level checked asap.
edit: Was anything relating to the fluid checked upon installation? Fluid/filter change, level check, even just a fluid color check?
It was a used transmission and the transmission oil filter and gasket was the only thing changed. The level of the oil was checked while monitoring the temperature
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1 hour ago, ma77hewsu11ivan said:
Could be low fluid or simply a trans adaptation. Or worse...
going with the assumption it's not the low fluid and it's a trans adaptation, what would need to be done for something like that? I don't want to think of the worse scenario just yet
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I recently changed my transmission with a used one I bought online.
After picking up from the shop which was about 2 hours away the truck drove fine while on highway but once i got off the highway and came to a stop the truck wouldn't accelerate. I hit the gas and for about 3-5 seconds it didn't go anywhere and then all of a sudden it kicked in to gear. When i drive it with the tip-tronic it seems to be fine until I come to a a complete stop.
I read on a different forum that someone was having the same issue and got some software updated but unfortunately doesn't say what the update was and it's a post from 2013.
Any help will be greatly appreciated. I really like this car i purchased a couple months ago.
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18 hours ago, wizard said:
As you may be aware, ATF expands as its temperature rises. Being absolutely certain that the fill level is as it should be at the prescribed temperature seems to be the easiest next step.
Are you aware if the ATF and filter have ever been changed before?
Do a search for 'Help finding a Valve Body' on here and read the Revmax post. That may prove helpful.
I am not sure if that was ever replaced and i was going to do it myself but i wanted to go with just the oil flush before i spent anymore money doing things that "might be the problem"
Do you think the Transmission control module TCM might have anything to do it with after it gets warm and causing the transmission to shift that way?
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I have no experience with the Toyota fluid as we do not use it.
You need to read the trans fluid temps in orders to obtain the correct fill level. This can be done with a simple thermocouple or a non contact pyrometer during a DIY fluid change, but measuring it fluid temp is important.
I went based of this article I found.
https://www.renntech.org/forums/topic/40735-porsche-cayenne-atf-vs-toyota-type-iv-atf/
I'm not really worried to much about the atf as much as the Jerking and or slipping the transmission does and did before I did the oil change. It only starts doing it after the car warms up and I drive it for over 2-3 miles
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Welcome to RennTech:welcomeani:
What fluid did you put in the trans, and what procedure did you use to make sure it is properly filled?
I am sorry but I forgot to mention that the transmission was doing this before I changed the oil. I was hoping by replacing most (I know by just removing the drain plug it doesn't remove all the oil) that it might make the problem better.
I found an article on this forum saying the Toyota type IV atf was the same as the Porsche so I used that one. I didn't have the duramax tool so I used a tool that measured the heat while the car was running before I topped off the transmission from the fill plug.
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I've searched forums for this issue and can't seem to find someone else having anything similar to what I experience.
I have a 2006 Porsche Cayenne S with 207k miles. I personally did the oil change, both differentials, transfer case and flushed the transmission fluid.
When I first turn on the car and drive it around for about 2-3 miles the car runs perfectly fine. But once the car get warm it sounds like the transmission is slipping and it makes the car jerk when driving and slowing down.
I know most signs point to the transmission needs to be replaced but before I go that route I want to make sure I've exhausted all possible (cheaper) options.
Has anyone had any idea what this could possibly be.
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Rim / wheel type name
in 9PA, 9PA1 (Cayenne) Part Number Requests
Posted
I took these off of my 2006 Cayenne when I sold it last week and I'm trying to figure out if it's worth fixing the curb rash but I cant seem to find what they are called or if it's worth fixing.
Any help would be appreciated.
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