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Corvette Servo Install Troubles

oldscsc

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oldscsc Enthusiast

oldscsc

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Here's what I'm working with.

 

Piece number one (first to install into transmission).

IMAG0013.jpg

 

Number two.

IMAG0014.jpg

 

Number three. Now it will compress.

IMAG0015.jpg

 

Number three again, compressed this time.

IMAG0016.jpg

 

Piece number four.

IMAG0017.jpg

 

Then all together. (I know the cover o-ring isn't on there at this point).

IMAG0019.jpg

 

Everything on the table here, compare to the pic in this thread: http://gmfullsize.com/forum/showthread.php?t=98029

IMAG0021.jpg

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oldscsc Enthusiast

oldscsc

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Everything compresses fine until I put the cover on. Until then, I can get compression out of the little spring under the e-clip on the pin AND the bigger spring that slides over the pin at the very beginning of the assembly.

 

After I put the cover on, I can't get any compression out of the spring under the e-clip because the cover is hitting the piece with the ridges (in the middle, normally comes with a red o-ring) and isn't allowing the spring under the e-clip to compress. So when it's in the truck, I'm just squashing the cover against the aforementioned piece, and obviously it's not doing me any good. What's going on here?

brainpause Enthusiast

brainpause

Posted
Posted

Good pictures, but it has been too long for me to remember whether those are right.

 

As I said before, mine would compress up to a point, just like yours. I still think that it is ever so slightly crooked.

 

Do you also put a little transmission fluid around the edges as you try to slide it in? That might help.

oldscsc Enthusiast

oldscsc

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Man, I've sure been trying to get everything in straight. Everything is soaked in ATF, and I've tried putting everything in without the O-rings to make sure nothing is hanging up. I've been messing with this damn servo for half a week, so I'd sure hope I would have gotten it straight at least one, but who knows. Using a wood block results in the same thing. Everything feels fine until I put the cover itself on...

 

I guess I need to know whether or not I need the spring under the e-clip to compress in order for the assy. to go in? As of right now, the only compression I'm getting is from the bigger spring this slides over the pin right where the pin goes into the bore.

 

Thanks again for the help guys. We'll get it eventually, hopefully :ughdance:

txab Senior Enthusiast

txab

Posted
Posted

You've got it assembled wrong.

 

Back to the drawing board and pay attention to your steps

 

Your inner housing is reversed for one thing

oldscsc Enthusiast

oldscsc

Posted
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You've got it assembled wrong.

 

Back to the drawing board and pay attention to your steps

 

Your inner housing is reversed for one thing

 

 

Thank God, some hope for gettting this thing going! By inner housing, I assume you mean the one with the red O-ring? Even flipped around, the cover still hits on the piece with the red O-ring so I can't compress the smaller spring.

 

Thanks txab, you're a lifesaver if you can help me get this thing up and running again! Feel free to throw out everything that's wrong, I obviously need all the help I can get.

txab Senior Enthusiast

txab

Posted
Posted

Also make sure you've got the 4th apply piston installed correctly

 

 

Did you look closely at the pics in the "how to" thread and compare to your assembly? Your pic doesn't match

oldscsc Enthusiast

oldscsc

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All I'm seeing is the piece with the red O-ring was flipped around. Do you see anything else?

 

As for the fourth apply piston, I have it sitting on top of the e-clip with the raised portion facing outwards towards the inside of the assy. cover. I can take as many pictures as I need to, so let me know if you'd like any more.

grizzly700fi Enthusiast

grizzly700fi

Posted
Posted

All i can see wrong is the inner housing(red o ring) is flipped. When you put it in do you stick the spring in first? Thats how i did mine. then slide the pin with the corvette servo and inner housing on it. Next the 4th apply piston with the more raised part sticking into the cover. The Blue o ring gets hung up a little on the snap ring groove you have to really push hard. Heres all the stuff i used when i installed mine i also did the 4th apply piston and cover though.

 

 

 

http://www.gmfullsiz...highlight=servo read page 1,3

http://www.gmfullsiz...highlight=servo

http://www.355nation...rive-servo.html

 

 

EDIT: you got the small black spring installed against the corvette servo then the washer and the e clip in the groove its supposed to be in? The big spring that goes in the corvette servo went in ok and compresses and the snap ring is in all the way? just throwing stuff out there.

post-71866-0-76654200-1342649550_thumb.jpg

post-71866-0-76654200-1342649550_thumb.jpg

post-71866-0-76654200-1342649550_thumb.jpg

post-71866-0-76654200-1342649550_thumb.jpg

grizzly700fi Enthusiast

grizzly700fi

Posted
Posted

Ya the corvette servo firms up the shifts, makes them quicker. the 4 apply piston that i got holds the bands 40% tighter( better for towing) and improves the 4-3 shift

  • 2 weeks later...
oldscsc Enthusiast

oldscsc

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Well, got it figured out...kinda. The good news is that its none of my fault. The bad news is that its going to end up costing me a lot of money.

 

The bottom line is that I wasn't doing anything wrong. The assembly was put together correctly and all that good stuff. The tabs that the band has on it broke. I took it to a trans shop (I need the truck by mid August and work full time so I had no choice.). After having the same problem I was having, they dropped the trans. Found the broken band, f***ed clutch drum that the 2-4 band acts on, smoked 3-4 clutch, etc. I knew the trans needed rebuilt, but I was trying to limp it along until I got out of school. Oh well, nothing you can do.

 

The whole trans is going to be rebuilt. Details coming soon, but it'll be a beast. And to top it off, I'm going to look at an LQ9 tomorrow. :D This smoked trans might be a blessing in disguise. Only time will tell!

6Sixathome Enthusiast

6Sixathome

Posted
Posted

Ya the corvette servo firms up the shifts, makes them quicker. the 4 apply piston that i got holds the bands 40% tighter( better for towing) and improves the 4-3 shift

 

Will a TCM tune do the same thing or not quite?
pacrat1958 Enthusiast

pacrat1958

Posted
Posted

Yes...TCM tune does the same thing....firms up shift. I have the corvette servo and had to back the settings on the tcm firm shift back to -18 on the 1-2 shift. Would snap my neck with the canned firm shift tune. Probably going back with the stock servo now that Intune is updated with TCM support.

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