transmission replacement question
Thread Starter
Heel & Toe
Joined: Oct 2016
Posts: 20
Likes: 0
From: Vernon CT
transmission replacement question
I just popped the transmission in my 1988 Corvette. I have an opportunity to pick up a 700r4 from a firebird. Will this transmission fit my car? I need to get this back on the road asap.
Thanks in advance!!
Thanks in advance!!
Instructor
Joined: Jun 2015
Posts: 128
Likes: 13
IIRC, the output shaft of the firebird (assuming here the firebird has a v8 700r4) needs to be cut shorter about 5/8".... and then swap the talihousing. there are threads here that detail this... You'll need to search for them.
Good luck
Good luck
Thread Starter
Heel & Toe
Joined: Oct 2016
Posts: 20
Likes: 0
From: Vernon CT
Can I just use the output shaft from the popped transmission? is that more work that I need to do?
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
Not hard, but you need to be sure to get the input drum seated properly or it will cause damage. The trans will need to be standing up, with the pump pointed at the ceiling. You will need a pump gasket at a minimum.
Last edited by confab; Jul 27, 2017 at 12:50 PM.
Race Director
Joined: Apr 2003
Posts: 17,698
Likes: 1,667
From: moraga ca
It'll be a lot easier to cut the end off of the Firebird tranny. I used a cutoff wheel when I did it. Cover the rest of the tailshaft with a rag so particles don't get into the tranny and use a shopvac when you're cutting.
Thread Starter
Heel & Toe
Joined: Oct 2016
Posts: 20
Likes: 0
From: Vernon CT
Regards,
G
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
Instructor
Joined: Jun 2015
Posts: 128
Likes: 13
I freely admit to being quite lazy... and I see confab came thru for you already...
If you take the output shaft from the old tranny, you'll learn a whole lot more about the tranny.... but I'd cut the firebird shaft in a heart beat ...
You'll get a chance to see the guts soon enough....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Thread Starter
Heel & Toe
Joined: Oct 2016
Posts: 20
Likes: 0
From: Vernon CT
It was trial and error for me on that search too, I have no recollection of what terms finally made me stumble onto it....
I freely admit to being quite lazy... and I see confab came thru for you already...
If you take the output shaft from the old tranny, you'll learn a whole lot more about the tranny.... but I'd cut the firebird shaft in a heart beat ...
You'll get a chance to see the guts soon enough....
I freely admit to being quite lazy... and I see confab came thru for you already...
If you take the output shaft from the old tranny, you'll learn a whole lot more about the tranny.... but I'd cut the firebird shaft in a heart beat ...
You'll get a chance to see the guts soon enough....
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
Remove the tailshaft housing from both.
Measure from the rear of the case on the vette unit and cut the shaft on the firebird unit to the same length. Deburr and chamfer the cut and use a triangle file or something similar to clean up the splines.
Reassemble with vette tailshaft housing and spedo gears.
It would be REALLY HARD to screw this up.. It's like 5 bolts.
Last edited by confab; Jul 27, 2017 at 04:02 PM.
