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Topic: 350 turbo transmission question

in Forum: C3 Driveline Components

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350 turbo transmission question (1/3)
5/20/22 6:19pm

Mark Laird
Limited Member
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Milford, DE - USA

Vette(s):
1977 C3 Auto Coupe Lt Blue/Dk Blue Prev. 1968 C3 convertible 4spd Red 1984 C4 Automatic Silver 2000 C5 Automatic Black

Joined: 11/6/2021
Posts: 57

I have a stock 77 with a L48 and 3spd turbo 350 Transmission.

Question is..How much can it handle with a engine rebuild or replacement.

I plan on rebuillding or replacing my engine with a small upgrade in horsepower..Not much maybe 50 to 100 hp. Do I need to replace trans with a stronger one. If so what type and how hard is it to replace with a newer one?

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Re: 350 turbo transmission question (2/3)
5/20/22 9:35pm

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: 19917

IF the trans is in good condition now, then you shouldn't have any issues with it. The stock 350 trans can handle 250-300hp when properly assembled, with stock components.

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Joel Adams
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Re: 350 turbo transmission question (3/3)
5/21/22 12:45pm

Thank you

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