Changing front seal on a 700R
Thread Starter
Team Owner
Joined: Mar 2001
Posts: 30,858
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Changing front seal on a 700R
I'm on the phone with CuisinartVette right now.
He's on a job 100mi from home, got it done, but now he's stuck.
700R's where put in Corvettes right? I'm a stick man.
His transmission, on his work van, is vomitting fluid all over the place.
It's coming on between the engine and trans.
Sounds like a seal.
Anyone know how hard it is to change the front seal on a 700R?
He's on a job 100mi from home, got it done, but now he's stuck.
700R's where put in Corvettes right? I'm a stick man.
His transmission, on his work van, is vomitting fluid all over the place.
It's coming on between the engine and trans.
Sounds like a seal.
Anyone know how hard it is to change the front seal on a 700R?
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Thanks for posting, towtruck just dropped me off. 
Went up a long grade (14 miles uphill), acted fine never leaked. 10 min later on the fwy looked in my mirror and nothing but smoke. Managed to get off the fwy and parked right away.
Fuid pumping out of the front of the trans like theres no tomorrow.
Figured maybe I got it hot so I let it cool for an hour and upon starting it started puking it right away in "P".
Is this normal for a seal or could it be something worse?
Went up a long grade (14 miles uphill), acted fine never leaked. 10 min later on the fwy looked in my mirror and nothing but smoke. Managed to get off the fwy and parked right away.
Fuid pumping out of the front of the trans like theres no tomorrow.
Figured maybe I got it hot so I let it cool for an hour and upon starting it started puking it right away in "P".
Is this normal for a seal or could it be something worse?
Pro
Joined: Sep 2007
Posts: 545
Likes: 2
From: st albert alberta
The same thing happened when i had my iroc years ago the front seal in the trans was leaking bad so i dropped the trans and replaced the seal and took it for test drive and again it was leaking from the front seal bad.So i dropped the trans again and i noticed the flex plate was cracked all around the bolts where its bolted to the crankshaft and it caused the converter to ''walk'' and that destroyed the front transmission seal.i put in a new flex plate and front trans seal and it was fixed . 
Last edited by makn u shiver; Oct 27, 2008 at 02:23 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Usually a seal going bad will just leak a small bit, getting progressively worse but if it was "puking" out then I would guess you may have some more serious issues. For all the work involved just to replace the seal I would;
A.... junk it
B.....get another trans from a junk yard and just swap them, hardly any more work than replacing the seal.
A.... junk it
B.....get another trans from a junk yard and just swap them, hardly any more work than replacing the seal.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
After talking to 2 tranny shops sounds like if you get these 700s really hot they can push the front bushing(??) out.
Sure the trans got plenty hot going up the grade.
Was told not to do just a seal but do the "updated kit' (whatever that is), seals and new front pump $500 for everything .
Its already been rebuilt once by Aamco 8 yrs ago..
Put 2 quarts of fluid in it and started it...Slow drip. Shifted to R and D tight as ever, drove it real easy a few blocks to my storage and parked it. Was coming down pretty good. By the time I get a converter (think this ones on its way out), flexplate Ill be into this more than the vans worth assuming the trans is still good.. Dang.
Sure the trans got plenty hot going up the grade.
Was told not to do just a seal but do the "updated kit' (whatever that is), seals and new front pump $500 for everything .
Its already been rebuilt once by Aamco 8 yrs ago..
Put 2 quarts of fluid in it and started it...Slow drip. Shifted to R and D tight as ever, drove it real easy a few blocks to my storage and parked it. Was coming down pretty good. By the time I get a converter (think this ones on its way out), flexplate Ill be into this more than the vans worth assuming the trans is still good.. Dang.
