Turbo 350 trans service

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Nov 27, 2005 | 06:23 AM

AlCherry

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Racer

Joined: Oct 2005

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From: Rye TX

Turbo 350 trans service

Quick question......Does the Turbo 350 torque converter have a drain plug? (1980)
I haven't gotten under there to look yet.

Nov 27, 2005 | 08:29 AM

45ACP

Melting Slicks

Joined: Apr 2000

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Quote:

Originally Posted by AlCherry

Quick question......Does the Turbo 350 torque converter have a drain plug? (1980)
I haven't gotten under there to look yet.

Not from the factory, but somebody may have installed one in the years since it was built.

If you take it to a tranny shop with the right equipment, they can flush that system very, very thoroughly, much better than you can do by merely dumping all of the fluid out of the pan + draining the converter (assuming it has a drain plug in it).

I won't recommend putting a drain plug in the converter unless you are intimately familiar with the inner workings of the converter. Drill it in the wrong spot and you will cause yourself big trouble. It is a lock-up unit and so there are certain areas that will not tolerate a hole in them! There is also the chance of contaminating the whole system with chips.

Unless they are subjected to extreme heat, automatic trannies should have their atf changed every 25 or 30 thousand miles.

Nov 27, 2005 | 11:34 AM

CA-Legal-Vette

Race Director

Joined: Jul 2004

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From: Scottsdale Arizona

Quote:

Originally Posted by 45ACP

It is a lock-up unit and so there are certain areas that will not tolerate a hole in them!

.

Only a lockup in the LG4's I think. The lockups started in 81. They need the CCC to control the lockup feature.

Nov 27, 2005 | 12:19 PM

comp

Team Owner

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From: eville in

Hmmmmmm

Nov 27, 2005 | 12:19 PM

45ACP

Melting Slicks

Joined: Apr 2000

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Quote:

Originally Posted by CA-Legal-Vette

Only a lockup in the LG4's I think. The lockups started in 81. They need the CCC to control the lockup feature.

I believe that the THM350C was used starting in the '80 model year in all auto equipped vettes. It was later replaced by the 700R4 in '82.

Nov 27, 2005 | 09:05 PM

LABulldog

Burning Brakes

Joined: Mar 2002

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From: Louisiana, It's Always Party Time!

My 1980 shop manual describes a vacuum actuated electrical switch that is supposed to lock up the converter under a number of specific conditions. I have this switch on my car but I don't know if it is working properly.