Lock-up vs non-lockup

Red5Ltr · 06-16-2004, 11:24 AM

I'm looking at getting a 3000rpm stall converter and I was wondering everyone opinion on either a lockup or a non-lockup convertor.

Look at my signture for the mods to my 93' 5.0

Thanks all,

John

crazypete · 06-16-2004, 12:18 PM

I decided to go with a lockup and 4.56 gears and I am thinking that perhaps staying 3.73 with a nonlockup would have been a better idea. When the converter locks up, it devastates all meaningful performance, even when I'm running around on 4.56's! I would recommend the nonlockup if you dont choose a ridiculous stall speed and you can swallow a mpg or two loss in economy.

Mach 1 · 06-20-2004, 10:28 PM

Non lock up is the way to go. Stronger and more performance. You will have to change your input shaft if i remember correctly.

rwhite65 · 06-21-2004, 02:08 AM

depends on brand u want, if u r thiking of Precision...mine is lock-up 2800 stall, and they say it will handle way more power then most of us are putting down.
I notice no problems with performance by having mine as a lock up version.

Mach 1 · 06-21-2004, 07:41 AM

I had a precision non-lockup. Ever notice how your car "falls flat on its face" when it "locks up"?

Depending on your power output, the input shafts are a known weak spot and the non lockup uses a one piece input shaft, which is stronger.

Are you going to drag race your car at all? Take it to the track? My AOD was moddified so the shift pattern was different, and I could hold second and third gear at the track without going into OD or lock up. If your mostly concerned with cruising and will do a lot of highway driving, you might want to keep lockup, but to me the extra strength was worth getting rid of it.

Its all a compromise, just think about whats better for you. If your after performance more than mileage, non lock up might be your best bet. If not, consider the other way.

06-16-2004, 11:24 AM	#1
Red5Ltr Registered Member Join Date: Mar 2004 Location: Sandusky, Ohio Posts: 50	Lock-up vs non-lockup I'm looking at getting a 3000rpm stall converter and I was wondering everyone opinion on either a lockup or a non-lockup convertor. Look at my signture for the mods to my 93' 5.0 Thanks all, John __________________ 93' Mustang w/ a stock 302 block, E303 cam, 3.73 gears, Pulleys, Edelbrock Performer upper and lower, Edlebrock 70mm throttle body, gt40 heads 1.94 intake, 1.60 exhaust, 1.6 roller rockers, American Thunder exhaust, BBK cold air intake, BBK off road H-pipe, BBK 1-5/8 shorties, AOD with shift kit and 15* timing.

06-16-2004, 12:18 PM	#2
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	I decided to go with a lockup and 4.56 gears and I am thinking that perhaps staying 3.73 with a nonlockup would have been a better idea. When the converter locks up, it devastates all meaningful performance, even when I'm running around on 4.56's! I would recommend the nonlockup if you dont choose a ridiculous stall speed and you can swallow a mpg or two loss in economy. __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

06-20-2004, 10:28 PM	#3
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	Non lock up is the way to go. Stronger and more performance. You will have to change your input shaft if i remember correctly. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

06-21-2004, 02:08 AM	#4
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	depends on brand u want, if u r thiking of Precision...mine is lock-up 2800 stall, and they say it will handle way more power then most of us are putting down. I notice no problems with performance by having mine as a lock up version. __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

06-21-2004, 07:41 AM	#5
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	I had a precision non-lockup. Ever notice how your car "falls flat on its face" when it "locks up"? Depending on your power output, the input shafts are a known weak spot and the non lockup uses a one piece input shaft, which is stronger. Are you going to drag race your car at all? Take it to the track? My AOD was moddified so the shift pattern was different, and I could hold second and third gear at the track without going into OD or lock up. If your mostly concerned with cruising and will do a lot of highway driving, you might want to keep lockup, but to me the extra strength was worth getting rid of it. Its all a compromise, just think about whats better for you. If your after performance more than mileage, non lock up might be your best bet. If not, consider the other way. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

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