TH350 Transmission Lockout

[Swedchevy67]

Need help regarding my 350 trans. What does "lockup" means?
Do I need some wiring to the gas pedal?
What's the difference without? More gas?

[kwmech]

Have no idea what you are talking about, unless you have a later model with the lock up torque convertor. All of the early T350 just had a kick down cable.

[truckster]

The THM 350 doesn't have a lockup torque convertor, so you have no worries.

On a transmission with a locking torque convertor, the torque convertor locks at higher speeds (usually abover 40 MPH) to save fuel.

[Swedchevy67]

Originally Posted by kwmech

Have no idea what you are talking about, unless you have a later model with the lock up torque convertor. All of the early T350 just had a kick down cable.

Yes that's right. It's a lockout torque converter.

[Swedchevy67]

Originally Posted by truckster

The THM 350 doesn't have a lockup torque convertor, so you have no worries.

On a transmission with a locking torque convertor, the torque convertor locks at higher speeds (usually abover 40 MPH) to save fuel.

You mean that it is only more economic?

[truckster]

Originally Posted by Swedchevy67

Yes that's right. It's a lockout torque converter.

Are you sure? Did you buy a THM 350C? They're not very common, and to my knowledge were never original equipment in any of these trucks.

[Swedchevy67]

Originally Posted by truckster

Are you sure? Did you buy a THM 350C? They're not very common, and to my knowledge were never original equipment in any of these trucks.

I bought it from a guy here in Sweden. He said it's a TH350 Chevy lockout with short ostrich, standard Turbin.

[geezer#99]

Luv those terms!!
Short tail and standard convertor I think.
Turbo 350c was available in later trucks. THey had a switch on the tranny just behind of the shifter shaft. THey were controlled by an electric switch that was tied in with the vacuum from the motor. THe lock up was for better mileage and longer tranny life.
Here's a pic of one.
http://www.hotrodders.com/forum/turb...ng-206049.html

[Swedchevy67]

Originally Posted by geezer#99

Luv those terms!!
Short tail and standard convertor I think.
Turbo 350c was available in later trucks. THey had a switch on the tranny just behind of the shifter shaft. THey were controlled by an electric switch that was tied in with the vacuum from the motor. THe lock up was for better mileage and longer tranny life.
Here's a pic of one.
http://www.hotrodders.com/forum/turb...ng-206049.html

I would send a picture, but I don't know how to do it.

[Gromit]

If you do have that "C" version and plan to run it (or for that matter run any TH350) - I would recommend this e-Book - you can download it to Google books (or Kindle with Amazon) and have it in seconds.

(But it did take me a few days to read and understand).

Here is the title:

GM Turbo 350 Transmissions: How to Rebuild and Modify

Author is Cliff Ruggles

You can also find a lot of information just on the wiki page about your transmission.

https://en.wikipedia.org/wiki/Turbo-Hydramatic

And then Transgo.com has some good technical information too; and if you buy one of their kits they have excellent technical support via telephone.

http://www.transgo.com/

[Swedchevy67]

Originally Posted by Gromit

If you do have that "C" version and plan to run it (or for that matter run any TH350) - I would recommend this e-Book - you can download it to Google books (or Kindle with Amazon) and have it in seconds.

(But it did take me a few days to read and understand).

Here is the title:

GM Turbo 350 Transmissions: How to Rebuild and Modify

Author is Cliff Ruggles

You can also find a lot of information just on the wiki page about your transmission.

https://en.wikipedia.org/wiki/Turbo-Hydramatic

And then Transgo.com has some good technical information too; and if you buy one of their kits they have excellent technical support via telephone.

http://www.transgo.com/

Thanks! Need all info I can get.
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