1980 corvette

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Jul 16, 2018 | 03:54 AM

rdv3842

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1st Gear

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1980 corvette

1980 corvette with 305 cid, is it lock up converter, cuz i wanna change my thm 350 thm700 r4

Jul 16, 2018 | 12:58 PM

MelWff

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if it is the original transmission it has the lock up converter.

Jul 16, 2018 | 09:45 PM

av81

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From: wilmington Ma

Lock up converters came out in 81

Jul 17, 2018 | 03:13 AM

v2racing

Melting Slicks

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From: Spring Park MN

Quote:

Originally Posted by av81

Lock up converters came out in 81

No, TH 350C trannies were in 1980 Vettes. I had one, seen lots of others.

Mike

Jul 17, 2018 | 07:30 AM

av81

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From: wilmington Ma

I guess I stand corrected

Last edited by av81; Jul 17, 2018 at 07:36 AM. Reason: Typo

Jul 17, 2018 | 08:52 PM

av81

Racer

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From: wilmington Ma

I had to think about this cause I had a new L82 1980 and it did not have a lockup converter , here's the answer some do some dont.

The NCRS manual appendix I have lists (3) automatic trannys for 1980 (page 126):

MV4 = THM 350C
MX1 = Automatic Transmission
M33 = THM 350 (for California)

Jul 17, 2018 | 09:02 PM

v2racing

Melting Slicks

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From: Spring Park MN

Quote:

Originally Posted by av81

I'm surprised the 350C wasn't used in California.

Mike

Jul 18, 2018 | 06:44 PM

terry82

Le Mans Master

Joined: Jul 2000

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From: columbia city in

does it matter what you have?you are changing everything anyway.you will need a lockup for 700r4

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Jul 19, 2018 | 08:14 AM

DVAST8R_88

Instructor

Joined: Apr 2002

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From: Maineville OH

So, if it had the lockup, but not the computer that the '81 has, what enabled it to lock?
Curious because I have an 81 that had the computer stuff disconnected by a previous owner.

Jul 19, 2018 | 09:05 AM

#10

terry82

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From: columbia city in

if you had a lock up, it was not working .if all the computer parts were disconnected,then it was not getting any info.I have changed these over on 81s and they did not have the lock up.You can look to see if you have any wires going to the tranny..If you do find lock up wires ,you cant use them for the 700r4

Jul 19, 2018 | 12:20 PM

#11

wajulia

Instructor

Joined: Aug 2010

Posts: 233

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From: Monrovia Md

Note the OP said it was a 305. 1980 California only 305CI with the ECM, Computer Controlled Carb and Turbo350 with the lockup converter -- all the same as the 1981 with a 350CI engine a year later. An obscure little corvette trivia question.

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