Transmission Question
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From: Ontario
Transmission Question
I have a 1976 Corvette with a 350 automatic transmission, I'm wondering if it's possible to swap it with a 4 speed automatic so that I can have an overdrive gear for better fuel economy.
Is there a tranny that would install easily without making any major modifications?
Is there a tranny that would install easily without making any major modifications?
Melting Slicks
Joined: May 2002
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From: Florida
I installed a 4L80E in my 76. I had to make a cross member, shorten the driveshaft and install a computer to run it. I needed the strength of this transmission so it's probably overkill unless you're looking for a bulletproof transmission. I don't consider these to be major modifications but I guess some people may.
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From: Ontario
Originally Posted by jimvette999
I installed a 4L80E in my 76. I had to make a cross member, shorten the driveshaft and install a computer to run it. I needed the strength of this transmission so it's probably overkill unless you're looking for a bulletproof transmission. I don't consider these to be major modifications but I guess some people may.
I've rebuilt the engine and added performance parts, so it has 300 or more HP now. So I'll probably need a stronger transmission.
Did you have to modify your exhaust for the new crossmember, I have headers and dual exhaust.
Team Owner
Joined: Jul 1999
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From: Orange Park Florida
Go to the Buick GN sites they have plenty of information on the 200r4, and it's the way to go.....basically a mechanical bolt iin....and can take any reasonable amount of power/torque....
GENE
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From: Ontario
2000r4
This looks like what I'm looking for.
Has anyone here installed one? I'm just wondering if there's any surprises to expect, does the driveshaft and/or crossmember need to be modified?
This looks like what I'm looking for.
Has anyone here installed one? I'm just wondering if there's any surprises to expect, does the driveshaft and/or crossmember need to be modified?
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Originally Posted by trotter73
I have a 1976 Corvette with a 350 automatic transmission, I'm wondering if it's possible to swap it with a 4 speed automatic so that I can have an overdrive gear for better fuel economy.
Is there a tranny that would install easily without making any major modifications?
Is there a tranny that would install easily without making any major modifications?
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Apparently the only weak point on the 200 that can't be fixed really well is the input shaft, but the 700 has a list of some 200 mods, and tons of parts to try for getting it to last a while, and I can assure you anything needing that kind of long list of parts needing mods or replacement is a POS right from the git go, and no reprieve......not worth it.....
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I am running a Stage II 700R4 from www.BowTieOverdrives.com - they are the same people as www.700R4.com and www.200R4.com
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From: Ontario
Originally Posted by redwingvette
200 4R is as direct a bolt in as it gets. 700R4 needs new crossover and shorter drive shaft. If it's built right the 200 4R works great.
Melting Slicks
Joined: May 2002
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From: Florida
Originally Posted by trotter73
How much did it cost you?
I've rebuilt the engine and added performance parts, so it has 300 or more HP now. So I'll probably need a stronger transmission.
Did you have to modify your exhaust for the new crossmember, I have headers and dual exhaust.
I've rebuilt the engine and added performance parts, so it has 300 or more HP now. So I'll probably need a stronger transmission.
Did you have to modify your exhaust for the new crossmember, I have headers and dual exhaust.
It was very expensive and I have sidepipe exhaust so no mods were needed.
Unless you're looking to save a few buck in gas, I'd keep the T350 and save yourself the trouble and expense of a transmission swap.
Good luck to you.