9987ta

Ok i flushed the fluid and its clean, now when you try to drive the car above 55 mph the car acts like the brakes are dragging! I beileve the trans is shimed TOO tight.

When the shop replaced the planetary gear the second time he replaced the two rear torrinten bearing. He said it was too tight and had to ADD a shim to reset the end play.?

Now as soon as it goes into overdrive then the convertor locks up the car acts like you are going up a hill. It has very little feel or respose to throttle unless you really push on it.Then it goes but the car NEVER coasts on the highway, you must be on the throttle ALL THE TIME above 55 mph. It very freaking strange.


Please someone with knowledge of these 4l60e's please tell me what to tell this shop before it gets ugly. I tried taking it to another shop but they refuse to touch it because someone else worked on it.

performabuilt

iTrader: (25)

Well for it to feel like the brakes applied in 4th only either the INPUT SPRAG would have to be locked up or the OVERUN CLUTCH stuck on. But it would seem it would burn up the clutch sets or band in either condition since iether the the 2-4 band and either the forward clutch or overun clutch would be in conflict.
So it drives normal in 1-2-3 this only happens in 4th?

9987ta

When the engine is cold it seems ok, as it gets hot after driving 15-30 mins the car starts to feel tight any time it shifts into 3rd and 4th. On the highway it feels like you are always going up a hill, the car never reaches speed to coast. Its very very odd , i've never experienced anything like it. It definatly gets worse the hotter it gets. It will accelerate nornally BUT it feels like the parking brake is always on. Before the trans rebuild we were getting 29mpg highway and 20-24 local, now its 24 highway and 12-15 local.

performabuilt

iTrader: (25)

Those are odd syptoms. I dont know what to tell you. Seems weird the tightening as it gets hotter. Since of it was a clearance issue seems it would either push the back outta the case or in the front melt plastic washers. Certianly odd for sure.
I wish I could be of more help but this is not the type of issue that can really be addressed over the net but would really need a personal look over.

9987ta

Oh the frt washer is plastic? thats good to know.Geez this thing is just getting on my last nerve. I had the fuel filter replaced because the engine pinging and acting odd. Now the engine seems ok but i have this weirdo issue. I wish i knew for sure what was going on,I hate to accuse this guy of poor workmanship because he is a good guy. Trying his best too.

I notice it seems fairly free untill it gets hot and above 50-55 mph after that its just so weird to drive, Imagine pulling the parking brake on at 50 and trying to drive.

Well knowing the frt washer is plastic means it should clearance itself if its too tight by melting down? yes?

performabuilt

iTrader: (25)

It would seems so. But have you considered other possibilites. I have seen a restricted catalytic converter cause similar symptoms.

9987ta

Well we did think that, he took it to the local dealer and had them run the standard scan tests. Everything checked out ok EXCEPT the fuel trims were at +8%. The trans showed zero slipage.

One other thing kinda crossed my mind, the engine computer was reset because the batt was disconnected for a few days. I realize it takes a few drive cycles to get back to normal BUT i've had it reset before and never expereinced anything like this.

Its the strangest thing i've even felt in a car. Before i say anything more to the shop i want my wife to drive it a few weeks. I'm just out of ideas and honestly the 1st time he worked on it it just felt nice and free. Shifted up through the gears very nice. Now it shifts nice but instead of feeling the shift going into 4 it just feels like a bump. Its different than before. And at that point it starts to loose power.

9987ta

Thinking about it i have to say it sure feels like a clogged convertor but the dealer says no. The way drives ok up to 50 makes me really think exhaust is blocked in some way. If you really stand on it, It dioesn't sound or run like it did before all this either. Its just different. I'm starting to really question any diagnoses until things get worse. NOWAY i'm questioning his work again unless its clear its something in the trans.
Cars can really be a PITA....this dam thing has got me stressed to the max.

Thank you for your help. I was gonna buy a trans from you but your installer was hurt so i just took the car to a local shop.

performabuilt

iTrader: (25)

Well keep us all posted of the results of a few weeks driving whatever it is should show itself well by then

9987ta

The fact the fluid turned black and it acts like this out on the highway is screaming take me apart don't you agree? He replaced the two rear bearings and mentioned the 1st time he tired assembling it there was no end play. So he ADDED a .008 shim someplace. He also mentioned the new bearings didn't match the old ones in thickness.

Geez talk about a mess..i so worried about this because its ALOT of money involved every time!

I'm not sure but maybe we should sell it and be done with it, omly reason we kept it was it was so good on gas.

performabuilt

iTrader: (25)

You kno it might be cheaper and about as fast to just order a trans from one of the vendors/sponsors here.

9987ta

Yeah i was thinking that but i don't have anyone to install it. I also don't want a built up trans, i really just wanted the stock ls1 trans without mods. Its my wifes daily driver.

performabuilt

iTrader: (25)

Ok just a suggestion.

9987ta

IT WASN"T THE TRANS!

Cars really suck!

caldercay

Sounds like the same issue I had .... clogged cat. No codes were set,
but the shop I brought it to used a laser thermometer - temps were out
of bounds, and there was not much pressure out the back of the pipes.
Also, the engine temp was approaching the red tick.

performabuilt

iTrader: (25)

SS

CATS was I right

9987ta

Well i wish i could tell you but i don't know, I just know its not the trans. I reset the computer again, then car suddenly starting running properly for no reason, it has full power again. I'm starting to think its something in the fuel managment. The fuel mileage is back up too....I'm lost but at least its not the trans. It maybe the 02 sensors, but thats just a guess. What is strange is it ran perfectly before the second trans repair AND for some reason the second time the computer reset after the bat was disconnected. I think this is the answer but until it i'm sure i don't want to say.

It ran like this before a long time ago after the dealer replaced all the injectors and reset the computer. It took a few weeks until it ran right. This was worse than that though and the mileage this time was really low. Now its sky high again! Crazy dam cars they make today. Its hard to know what really is wrong when there is a problem.

9987ta

What got me thinking to reset the computer is it would run fine up to about 55 then just loose power and the fuel mileage was just too low for this car. Also i heard the engine pinging at 55 mph at steady speed. It shouldn't do that, something in the fuel or in the computers recent memory must have been the trouble.

Unfortuneatly i think the second time the car was worked on the fuel in the tank was bad, when the trans guy disconnected the batt and it reset the computer it started relearning on bad fuel. I think this completely screwed the info it was seeing and messing with the programing. My wife kept adding good fuel from a station we know has no trouble or ethanol. We think we know where she got the bad fuel. I'm going to call them to see if they know anything about it.

The car is running fine now. Todays cars can be a real challenge to repair. She checked the mileage last night and it was back up at 25 local driving.

performabuilt

iTrader: (25)

Well at least it didnt end up being the trans again . And yes late model car issues can be a pain and internet diagnosis can be fun too.

9987ta

PSSSTTT my 1st thought was the cats too LOL

If the cats were bad it should set the check engine light BUt.........we know how that goes. I guess its still possible something in the cats is going on......time will tell! I just don't think the cats would go back and forth from running good to bad. Also how could the cats goes bad right as the trans is repaired?