Should I use a Lockup convertor for TH-350?
 

I have a TH-350 tranny. Is it best to use a Lockup type convertor? I intend to do some highway driving.

You have to have a th350-C to use a lock-up converter.


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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

I have tried to figure this out before. Is the TH-350C vacume assisted. In other words what is the best way to figure out what tranny I have & what type of torque converter to use.

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'84 Camaro w/ Large Jouranl 327 bored .030 over; 3.73 geared Auburn Limited Slip Diff. FlowMaster Muffler w/ Shortie Headers. TH-350 Built Trany Underneath B&M Mega-Shifter. Many Engine compartment Dress Up Mods. Edelbrock High Flow Water Pump w/ Flex-a-Lite Cooling Fan.
It is still under construction @ www.iserv.net~brodgers

The th350-C will have an electrical connection similar to the 700r4 to control the lock-up of the torque converter.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

No electrical connection like I was afraid of. I would really like a lockup converter because I drive on the street a lot. Is there still a way of installing one?

There is a vacume line going to the trany I thought that this is what controled the lockup.

Should I assmue that my current convertor is a non-lockup? If so the higher stall must make the big difference because it isn't too bad now.

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'84 Camaro w/ Large Jouranl 327 bored .030 over; 3.73 geared Auburn Limited Slip Diff. FlowMaster Muffler w/ Shortie Headers. TH-350 Built Trany Underneath B&M Mega-Shifter. Many Engine compartment Dress Up Mods. Edelbrock High Flow Water Pump w/ Flex-a-Lite Cooling Fan.
It is still under construction @ www.iserv.net~brodgers

You will need a different tranny(a th350-C) that is equipped to control the lock-up.


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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

Just adding to the above !!!

'Brockrogers' you can't just add a lockup converter to a non lockup transmission like the regular TH-350 and make a lockup setup. There is hardware inside the transmission to allow the converter to lockup.You need a Th-350C and a lockup converter to make it all work, A lockup Th-350 setup that is.
http://www.ronterry.com/share/th350c.jpg

Ron


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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe

[This message has been edited by ronterry (edited January 11, 2001).]

This is what I was afraid of. I guess now I need to determine if I can run w/ a NonLockup TC w/ 2400 stall. Thanks for all the help.

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'84 Camaro w/ Large Jouranl 327 bored .030 over; 3.73 geared Auburn Limited Slip Diff. FlowMaster Muffler w/ Shortie Headers. TH-350 Built Trany Underneath B&M Mega-Shifter. Many Engine compartment Dress Up Mods. Edelbrock High Flow Water Pump w/ Flex-a-Lite Cooling Fan.
It is still under construction @ www.iserv.net~brodgers

You'll be fine, but you might consider a Trans cooler to take care of that extra heat.
It's not a whole lot of heat over the lockup, but if you want it to live long then I would, esp. with a 2400 stall converter there's a bit more heat from that to.

Ron
TH-350, yeaa it's a Ron-built© https://www.thirdgen.org/messgboard/wink.gif
B&M Holeshot 2400
B&M Supercooler #70266
B&M Master Rebuild Kit
B&M ManualPak
B&M Torque arm thingy for 3rd gens
B&M Megashifter
TCI Hardened Race
Plumming w/Russell ProFlex #6
Valvoline Durablen ATF
Autometer Ultalite Trans Temp Gauge
Milodon pan studs
I think that's about it. https://www.thirdgen.org/messgboard/tongue.gif
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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe

I had that combo for a while in my 82 and it worked pretty good. Run a good cooler and you will be fine. Also, it runs cooler if your cruise rpm is around the same or higher than your stall speed. I had 3.08 gears and that convertor would slip like crazy going up hills at 60 on the highway.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

When the snow melts I'll drive it around and really pay close attention to it. That must be why it isn't a problem now. The stall is stock at like 1400 and I know I cruse at a higher rpm than that. Plus the 3.73 gears might help to put that cruse rpm up there. I dont want it to be shifting like you said at 60mph on the highway.

Dual Capicity cooler is on the list. I'll run oil through the other channel.

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'84 Camaro w/ Large Jouranl 327 bored .030 over; 3.73 geared Auburn Limited Slip Diff. FlowMaster Muffler w/ Shortie Headers. TH-350 Built Trany Underneath B&M Mega-Shifter. Many Engine compartment Dress Up Mods. Edelbrock High Flow Water Pump w/ Flex-a-Lite Cooling Fan.
It is still under construction @ www.iserv.net~brodgers

[This message has been edited by brockrodgers (edited January 12, 2001).]