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3/30/12 8:10pm - Original Message: '700R4 in an 82 C3'
tb2k82ce Lifetime Member
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Lemon Grove, CA - USA

Vette(s):
1982 C3 Collectors Edition 44000 miles, sat in the sun most of it's life, My wife purchased it for me for fathers day in 2007 from her girl friend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.

Joined: 10/17/2007
Posts: 2007
I took my car out for a run to the camera shop.  On the way back something happened.
 
It shifts through the first 2 gears ok but when it shifts into 3rd it slips.  It has slipped before but no it does not pull at all.  I slowed down and put in manually in to 2nd and brougth it home. 
 
Some more background info on the transmission.  I have had a couple of mechanic drive it and all of them thougth the transmission was slipping maybe.  So it is not a big surprize.
 
Now the question is there any chance that it could be adjustments or is it normally overhaul time.  I would like to have some info behind me for when I start talking to the transmission guy. 
 
What should I exspect to hear from them.  What if I hear should tell me to walk away from that shop.
 
Any suggestions?
 
Is the 700R4 hard to overhaul.  No I do not intend to do it myself I just interested when it comes to transmission how hard is it compared to others?
 


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3/30/12 10:51pm - Reply: 'Re: 700R4 in an 82 C3'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
Chances are, the TV(throttle valve) cable has been loose for some time, causing the 3-4 clutches to burn. The cable adjustment on 700s(and 2004Rs) is critical to their survival. One slipping shift can, and usually does burn the 3-4 clutches.
As far as how hard they are to fix/repair, they ain't....they are fairly simple, and parts are available just about everywhere.
I would suspect if you take it to a trans shop, they're gonna try to sell ya all they can....that's how they make money. My best guess is, from your description, the only thing really wrong is the burnt 3-4 clutch pack. However...a complete overhaul is the only reasonable way to fix it. An overhaul kit with clutches, possibly the 3-4 steels, a band, filter, and torque converter should be all that is needed. Of course, you won't really know for sure until the trans is torn down.
There are plenty of neat updates/upgrades available, too, but...if you don't plan on beating the heck out of the car, there's no real need to spend the $$$ for any of it.
I would also recommend replacing the TV cable, but....they're kinda hard to find for the '82. Might have better luck looking for one for a Camaro/Fireturd with the Crossfire engine. The cable is specific to the crossfires. There are "Universal" cables, but they ain't worth crap, imho, so I would stay away from those.

You should expect to pay in the neighborhood of $1000, give or take for a shop to do this. If you can take it out/reinstall it, you can save the labor, and possible damage to your car from morons that work at tranny shops. I can say this because I've worked with morons for 30+ years....they don't give a crap about their own cars...they dang sure ain't gonna give a crap about yours.




wow.....kinda got a little sidetracked there....sorry...


|UPDATED|3/30/2012 7:51:56 PM (AZT)|/UPDATED|


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Joel Adams
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3/31/12 12:07am - Reply: 'Re: 700R4 in an 82 C3'
tb2k82ce Lifetime Member
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Lemon Grove, CA - USA

Vette(s):
1982 C3 Collectors Edition 44000 miles, sat in the sun most of it's life, My wife purchased it for me for fathers day in 2007 from her girl friend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.

Joined: 10/17/2007
Posts: 2007

Joel

I think you are correct about the cable I had two shops say they addjusted it and it sounds like that did not work which ould lead me to believe it is a bad cable.  I can find lots of universal ones and I saw this which is a GM would is it just a universal or slightly better.  http://www.ebay.com/itm/GM-700R4-700-Throttle-Valve-Detent-Cable-Teckpak-82-92-/260820842206?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item3cba2236de 
 
Is there any up grades that one should do?  I do not intend to do anything much to the engine in the future but if there are things that will make it all last longer or run better and do not cost an arm and leg I would get those done at the sametime.  
 
The good Lord has been good to me and my wife.  I'm retired once and working again so while I do not want to waste money it is not as big an issue as it has been in the past. 
 
I just have lots of things to get finished on the car and this is the year that I want to get it all done.  I may decide to quit my current job and live off of my retirement next year.


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3/31/12 11:18am - Reply: 'Re: 700R4 in an 82 C3'
DaveM Lifetime Member
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Flanders, NJ - USA

Vette(s):
1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.

Joined: 1/27/2004
Posts: 2530
Hey Gilbert, I had my trans completely rebuilt. He use updated parts such as use in the early 90's Suburbans. He also firmed up the shifts. It cost me $1400 and I love the way it runs & shifts. Even after I put the new engine in it, it runs great, handles the power just fine. I had to change the TV cable with the new engine but I had the trans guy adjust it because it is so critical. Good luck with it.
Dave


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Dave's '82


   
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