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1975 Vette transmission swap

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1975 Vette transmission swap

Posted: 5/4/10 7:25pmMessage 1 of 4
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West Bend, WI - USA
Joined: 3/18/2010
Posts: 46
Vette(s): 1985 silver coupe & 1975 red coupe
I have a 1975 Vette and I'd like to update the old 3-speed tranny. What are the problems with installing a 700R4 over drive unit in this car. Thanks.
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1975 Vette transmission swap

Posted: 5/4/10 7:33pmMessage 2 of 4
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22716
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
Not too bad, really. The '75 has a 400 trans in it now. The good thing is, the crossmember you have will work fine, but you may have to elongate the two mount hole for the mount to bolt up.
Then you'll also need all of the normal 700-swap items, such as the TV cable , bracket, and carb linkage adapter, as well as the dip-stick/tube. You will need to have some driveshaft work done, also, which, in your case, will also include changing the front yoke.
There are DIY kits to modify your shifter, too, so that will work.

Joel Adams
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1975 Vette transmission swap

Posted: 5/4/10 7:49pmMessage 3 of 4
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.

You can search "700R4" right here on this site. There's a lot of good info. on this subject.

I'm having one put in to my '79 right now. I'm not that good with a wrench, so I'm paying to have it done. However, the threads here gave me a good idea of what parts were involved.

I say "go for it!"  Keep us posted.

Kevin

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1975 Vette transmission swap

Posted: 5/5/10 6:31amMessage 4 of 4
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
I am about to turn the key on my 700r4 swap this weekend!! Will post my updates and results for all. A great website to review is Bowtie Overdrives. They have a great 3 part series on 700R4 TV cable set up, which is one of the most critical success factors for the swap.
 
Have fun!!
 
Paul

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