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Possible 5EAT slipping


kshymkiw

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So, this one is kind of odd, and I will try to describe as best as possible. I was driving home today, and while merging onto the freeway, the car never shifted in "D" mode from 2-3. I backed off of it, and then it shifted itself, after missing the shift. I then was getting up to freeway speed at 30-50% throttle and noticed nothing big. I then went to pass someone and everything seemed fine until I hit 4500-5000 RPM, where it seemed to Free Rev itself like a slipping clutch pak. So I let off, and continued on, only giving it 50% throttle. When I got off the Freeway, I noticed a clunk from a dead stop, kind of like the car thinks it is in a wrong gear :confused:

 

From a stop, if I go straight to the gas, I get a abrupt clunk, this happnes <1500 rpm's then the car drives and shift just fine.

 

If I roll the car, i.e just let off the brake, the clunk doesn't happen at all and the car drives just fine.

 

If I get on the car there is no "slipping" feel until the car reaches 4500+ RPM with > 65% throttle.

 

If it were the clutchpak's wouldn't they slip at all ranges, and not just under very select conditions? Also what gives with the extra "lurch"/"clunk" when I start moving?

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I remember this thread

http://legacygt.com/forums/showthread.php?t=115853

What was the outcome? Are you now on a new transmission and new differential?

The clutchpacks would slip during either high load or at shift point. Yes, if you roll on the throttle and don't give it much gas, it will most likely drive normal unless the clutchpacks are severely damaged. The slipping will become obvious when you nail it.

Regarding your abrupt clunk from a dead stop, I am not sure what to say.

It could very well be these issues are triggered by one of the differentials.

Have you checked the fluid levels for the tranny and front diff? The rear diff is a bitch to check because you have to unbolt the fill plug.

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I remember this thread

http://legacygt.com/forums/showthread.php?t=115853

What was the outcome? Are you now on a new transmission and new differential?

The clutchpacks would slip during either high load or at shift point. Yes, if you roll on the throttle and don't give it much gas, it will most likely drive normal unless the clutchpacks are severely damaged. The slipping will become obvious when you nail it.

Regarding your abrupt clunk from a dead stop, I am not sure what to say.

It could very well be these issues are triggered by one of the differentials.

Have you checked the fluid levels for the tranny and front diff? The rear diff is a bitch to check because you have to unbolt the fill plug.

 

Yup, the outcome of that, was a new/salvage yard bought 5EAT, and new/salvage yard bought Rear Diff.

 

The clunk from a dead stop, is kind of like the car is revving, but doesn't acknowlegde (sp?) it is in a gear, until about 1200-1500 RPMS, and then it clunks in. Also there is another thing that is odd, when I let off the gas, it seems like the Clutpaks are completely dis-enagaged. The RPM's drop to what they are at idle ~700 instead of Overdrive kicking in, and holding it about 500-700 RPM's lower.

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So you never get the transmission in overdrive (torque converter lock-up)? At what speeds do you say the rpms drop all the way down to idle? I ask because this is more or less normal in city traffic up to 45mph or so. If this is happening on the highway then it is definitely not normal.

I am sorry but I don't have enough experience or knowledge to tell you with certainty what's going on. I am inclined to say it is the torque converter that is acting up, or both the converter and the clutchpacks.

Have you checked your fluid level?

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So you never get the transmission in overdrive (torque converter lock-up)? At what speeds do you say the rpms drop all the way down to idle? I ask because this is more or less normal in city traffic up to 45mph or so. If this is happening on the highway then it is definitely not normal.

I am sorry but I don't have enough experience or knowledge to tell you with certainty what's going on. I am inclined to say it is the torque converter that is acting up, or both the converter and the clutchpacks.

Have you checked your fluid level?

 

It happens at all speeds, city and highway. There is a definite vibration as well, when I am at Highway speeds, like something is out of balance.

 

The Transmission has only been in the car for ~2 weeks, so fluid levels were checked daily, since this was a salvage yard tranny, to make sure it wasn't burning/leaking any fluids.

 

I am taking it in today, and hooking it up to the Computer to read the TCM/ECU. No Check engine lights or flashing sport mode are on. It just wouldn't shift. My mechanic seemed to maybe think an entire gear went out, and is throwing the TCM off, by not having a gear there. Although, if I go through the gear in "manual" mode, I am able to accelerate in all of them, without any problems, until I hit the higher load.

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Does the salvage tranny still have some sort of warranty on it? Get it checked ASAP and contact the place you got it from to put them on notice something may be wrong.

 

No it doesn't. We tried to get a warranty 3 days late from them, and they said no way.

 

I took it in, and the clutch packs are def. hosed and going. We are more than likely going to do a rebuild of this tranny.

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I experienced very similar symptoms today (clunking from a stop) and slippage above 4000 rpm or so. I was hoping it was due to the cold weather (about 8 degrees below freezing) and I have had harder shifts until the tranny warms up on previous occasions... but after reading your post I feel kind of sick to the stomach...
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Currently has 62K Miles,

I purchased the car with 61K Miles with a blown turbo. I replaced the turbo with a VF46, put in a Cobb downpipe and a gutted up-pipe (no tune as of yet). I am not aware of how it was driven or the maintenance it received prior to me getting it. From day one I did notice a hard 1-2 shifting when it was cold but other than that it has been fine over the last thousand miles of driving. I have only really gone WOT 3 or 4 times and that has been in the last week (and only after it has been running for at least 15 or 20 minutes). I first noticed the problem when "driving normally". I was just out driving again and it is doing the "clunk" thing when starting from a stop all the time. If I drive like my grandmother, on a sunday, in front of a church, with children playing by the side of the road... I can get it to do a very minor (just noticeable "clunk") but if I accelerate from a stop normally the clunk is very noticeable. Are these the usual symptoms of clutch pack going / gone bad? Is it even worth trying to do a tranny flush now or should I prepare for a rebuild?

Thanks

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When the tranny is cold it is somewhat normal to clunk into 2nd gear, depending on what "clunk" really means. It is a hard shift, but should not feel like someone banged your tranny with a brick. More like kicking it with a boot, if that makes sense.

I would start with inspecting and draining or possibly flushing the transmission fluid. If it was never done, at 62K it's about time. Replace the ATF filter too, the dealer will tell you it is not needed but do it. It's an external unit, easily replaced by removing the battery. Essentially just like an oil filter. Also check with the dealer to make sure you have the latest version of the TCU map, I remember there was an update my 05 received. When you do the flush/drain, make sure the dealer uses OEM ATF that comes in silver quart bottles (NOT white bottles, those are for the 4EAT tranny, not the 5EAT).

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I experienced very similar symptoms today (clunking from a stop) and slippage above 4000 rpm or so. I was hoping it was due to the cold weather (about 8 degrees below freezing) and I have had harder shifts until the tranny warms up on previous occasions... but after reading your post I feel kind of sick to the stomach...

 

Hammer it from a stop, if it slips and you eventually hear a metallic type of noise...it is your clutchpacks. Mine would actually hold decently well, but we had to stay in it, to actually hear the clutchpacks chattering.

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Ok update:

quick review of the 4 symptoms:

1. Clunk from a standstill when accelerating normally. This happens when hot or cold and can be almost reduced by accelerating very very... very slowly. Note: This clunk is not the shift from 1st to 2nd but occurs in first

2. stuttering. This occurs sometimes during initial start from a standstill

3. Slipping. When accelerating at speed i.e. trying to merge onto the highway engine revs freely as if in neutral.

4. A vibration can be felt at speeds over 50mph and by 60mph things are shaking inside the car. This vibration continues even if the car is put into neutral. This started when the tranny problems started but it may just be a coincidence (and a tire weight fell off)

 

I checked the Tranny fluid level and it was ok.

I brought the car to my Transmission shop and after a test drive and experiencing the above symptoms they said the tranny was definitely slipping and they would do a line pressure test and probably have to look inside (check the clutch pack etc.) I will hopefully here back from them tomorrow on what they found.

 

If anyone has had there clutch packs replaced can you give me an idea of what they charged for the repair.

Thanks

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  • 2 weeks later...

Ok, I spoke to my tranny guy today.

They said the first issue they identified is low pressure.

They are trying to find a replacement "line pressure solenoid" but are having a hard time finding it separately (without the entire valve body). They said they have checked all the usual suppliers and so far have come up empty (in the Toronto area)

If anyone has any ideas of where I might try and source something like this please let me know.

Thanks

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Speaking from experience of a totally busted trans, I can say that a rebuild/clutch pack replacement at most shops will run you about 2 grand...Reason being---this aint your average transmission... There is a reason Scoob dealers dont service trannies---dont wanna pay the smart fkr that can fix em what he is worth. So after I busted my trans up, I went to every specialty trans shop and nationwide shop for pricing ---almost every one of em was 2 grand just for a standard rebuild... Now to address your problem directly---SEND YOUR VB TO IPT AND LET THEM FIX IT!!!!! THEY HAVE ACCESS TO ALL YOUR PARTS AND WILL NOT ONLY FIX THE PROB--THEY WILL TEST IT AND UPGRADE ITS SETUP...... is it worth the few hundred to do it? Just ask everyone that has had the VB Mod done to their VB's. You should just use some simple deductive reasoning on this and you should have you answer in no time flat.... Nuff said.
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IPT specifically stated that if any part of the valve body is busted, you will have to purchase a new entire unit because there are no replacement parts available. Maybe this has changed in the meantime since last time I checked, but be prepared to have to pay around 600 bucks for a new VB.
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Hey guys, thanks very much for the info (even if the news is not so good, I won't shoot the messenger!). I may also look into getting a used tranny from the "wreckers". Did the 5EAT come in the non turbo's as well? I guess I will look up that info as well. Thanks guys
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