Torque Converter Lockup Switch
#1
Senior Member
Thread Starter
Torque Converter Lockup Switch
ok i've been searching and searching for about a week yet, but i cant seem to get my question answered. so,
WHAT IS THE PURPOSE OF A TORQUE CONVERTER LOCKUP SWITCH?
i have an auto 700r4 and i wanna know should i make one, or would i better with out it?
and if i do make one when should i use it?
thanks in advance
WHAT IS THE PURPOSE OF A TORQUE CONVERTER LOCKUP SWITCH?
i have an auto 700r4 and i wanna know should i make one, or would i better with out it?
and if i do make one when should i use it?
thanks in advance
#2
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Torque Converter Lockup Switch
As long as you're still utilizing a stock ecu, there's basically little to no purpose in having a manual switch.
For those guys who are switching to carb or doing some more drastic driveline changes, they may benefit from having the ability to manual lock it up.
For those guys who are switching to carb or doing some more drastic driveline changes, they may benefit from having the ability to manual lock it up.
#3
Senior Member
Join Date: Apr 2007
Location: Huntington, NY
Posts: 394
Likes: 0
Received 1 Like
on
1 Post
Car: 1983 Pontiac Firebird
Engine: LG4 305ci 4bbl
Transmission: 700r4
Axle/Gears: 10-bolt open diff.
Re: Torque Converter Lockup Switch
i hooked up a lockup switch and it made one heck of a difference. instead of locking up only in OD, it locks up in 2nd, 3rd, and OD giving you better acceleration. the car definitely pulled harder. i rarely use it bc i've heard using it too much will damage the transmission.
#4
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Torque Converter Lockup Switch
i hooked up a lockup switch and it made one heck of a difference. instead of locking up only in OD, it locks up in 2nd, 3rd, and OD giving you better acceleration. the car definitely pulled harder. i rarely use it bc i've heard using it too much will damage the transmission.
The transmission knows no difference as to whether the tc is locked up or not. The stock tc lock-up clutch, on the other hand, won't handle very much hp.
If you have a good torque converter it will work better un-locked, doing the job as it's designed to. It can't multiply torque if it's locked up.
#5
On Probation
Join Date: Oct 2008
Location: Northern Utah
Posts: 6,319
Likes: 0
Received 17 Likes
on
17 Posts
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: Torque Converter Lockup Switch
True, but once a torque converter reaches it's stall speed, it basically quits doing any measurable multiplying.
#6
Supreme Member
iTrader: (3)
Join Date: May 2008
Location: boise, ID
Posts: 1,116
Likes: 0
Received 1 Like
on
1 Post
Car: 91 B4C "police special service"
Engine: L98 494hp
Transmission: tko-600 on order
Axle/Gears: 3.23 true trac
Re: Torque Converter Lockup Switch
The transmission knows no difference as to whether the tc is locked up or not. The stock tc lock-up clutch, on the other hand, won't handle very much hp.
If you have a good torque converter it will work better un-locked, doing the job as it's designed to. It can't multiply torque if it's locked up.
If you have a good torque converter it will work better un-locked, doing the job as it's designed to. It can't multiply torque if it's locked up.
I disagree somewhat if it's a lower stall (agree with a highter stall).....I have tried this experiment at the track....I have tried it un-locked and locked....What I seem to find best is after hitting about 2500-3000 rpm in second gear, I flip the switch, the convertor locks, and I have managed two tenths on the track consistantly....and a mile an hour....you definetly feel when the convertor is locked....also I lock mine when on a road course, it drives more like a manual....it will still unlock, even with switch on, when your in first gear, or hit the brakes, but otherwise stays locked....really good for the road racing!!!! But then again it's hard on transmission, so don't drive around with that on. You know you can do this by just putting two wires into the computer connector (might depend on year) in the cab under the dash....I believe it's the top left pin and top right pin...I have mine just pluged into those two pins, and then hooked right to a switch. works awesome. anyway...that's my two cents...
#7
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Torque Converter Lockup Switch
I disagree somewhat if it's a lower stall (agree with a highter stall).....I have tried this experiment at the track....I have tried it un-locked and locked....What I seem to find best is after hitting about 2500-3000 rpm in second gear, I flip the switch, the convertor locks, and I have managed two tenths on the track consistantly....and a mile an hour....you definetly feel when the convertor is locked....also I lock mine when on a road course, it drives more like a manual....it will still unlock, even with switch on, when your in first gear, or hit the brakes, but otherwise stays locked....really good for the road racing!!!! But then again it's hard on transmission, so don't drive around with that on. You know you can do this by just putting two wires into the computer connector (might depend on year) in the cab under the dash....I believe it's the top left pin and top right pin...I have mine just pluged into those two pins, and then hooked right to a switch. works awesome. anyway...that's my two cents...
Thread
Thread Starter
Forum
Replies
Last Post