700R4
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700R4
Posted: August 05 2008 08:06 PM
 
Mark Roby (aka robymarks) [ View ] [ mroby@coatesfieldservice.com ] [ Car Ads ] [ Blogs ]
Houston, Texas
(281) 728-1824
 
Am I right that with a carb engine you have to run a lock out switch on a 700 R4 Trans?
 
 
Comments
 
Posted by bigdude  -  08/05/2008 08:15 PM
No you dont.
resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004
 
Posted by robymarks  -  08/05/2008 08:26 PM
Ok..Thanks Big Dude. What do I need to know here. Why do some people run one of those. Do you just set the cable and all is well? Thanks
robymarks [ View ] [ Email ] [ Blogs ] [ Car Ads ] Houston, Texas Charter Member since October 2005
 
Posted by bigdude  -  08/05/2008 11:42 PM
You run a lockup switch if you have the lockup converter. Painless or RF havea setup that also cuts it out when the brakes are applied or speed reduced. You also need to get a geometry correcter for your carb to run the cable out of. If you have a lockup converter,you have to have it lockup or it could get pretty warm. I think that is what you were asking about.
resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004
 
Posted by whipsold39  -  08/05/2008 11:54 PM
I got my questions about transmiission answered from brian41chevy on this site and bowtieoverdrive.com. I finaly bought the complete kit from bowtie overdrive and they were very helpful with thier phone tech line.
whipsold39 [ View ] [ Email ] [ Blogs ] [ Car Ads ] 400 9th ave silvis 61282, Illinois Charter Member since January 2006
 
Posted by brian41chevy  -  08/06/2008 10:36 PM
Run it with the lock up convertor. There are different ways to do this depending on if it is a early or later trans.
There is a fine line between hobby and mental illness [ View ] [ Email ] [ Blogs ] [ Car Ads ] New Lenox, Illinois Charter Member since November 2004
 
Posted by jimmothershead  -  08/07/2008 08:38 PM
TV cable controls the gears, not the converter lock up. No, No, no switch for the lock up. Use a Ron Francis TC-70 mini-module that allows you to set lock up speed. It is all external, mounts under dash.
www.ronfrancis.com
Jim [ View ] [ Email ] [ Blogs ] [ Car Ads ] Huntingtown, Maryland
 
Posted by robymarks  -  08/07/2008 11:07 PM
So Jim MH...you're saying no switch? (HeHe)
robymarks [ View ] [ Email ] [ Blogs ] [ Car Ads ] Houston, Texas Charter Member since October 2005
 
Posted by bigdude  -  08/08/2008 12:32 AM
Thats the switch I was referring too.before the teacher set us straight LOL!
resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004
 
Posted by jimmothershead  -  08/08/2008 08:16 AM
Mark......converter must be unlocked at about 44 miles per hour depending on rear ratio and tire size. No problem to drive with a unlocked converter = trans will slip same as TH 350. Won't hurt it.
Jim [ View ] [ Email ] [ Blogs ] [ Car Ads ] Huntingtown, Maryland
 
Posted by Crazyhorse Rod Shop  -  08/08/2008 08:53 AM
use a 200 and you dont have to mess with all that stuff
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by aosborn  -  08/09/2008 02:23 AM
Run your 700 with a non-lockup converter, nice and simple...
aosborn [ View ] [ Email ] [ Blogs ] [ Car Ads ] Olympia, Washington
 
Posted by brian41chevy  -  08/09/2008 10:04 AM
Why would you want to run a 700R4 without the lock up feature?
There is a fine line between hobby and mental illness [ View ] [ Email ] [ Blogs ] [ Car Ads ] New Lenox, Illinois Charter Member since November 2004
 
Posted by Crazyhorse Rod Shop  -  08/09/2008 10:07 AM
i've run several 200's without lock up but i prefer to use it. brian, aren't there some 700's that have to have lock up ?
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by brian41chevy  -  08/09/2008 10:14 AM
It just doesn't make any sense to run it without the lock up. That helps your milage. Why not use it the way it was designed to be used. If it is an early 700 you can put a pressure switch into the side port to control the lock up. If it is a later one you use the internal one.
There is a fine line between hobby and mental illness [ View ] [ Email ] [ Blogs ] [ Car Ads ] New Lenox, Illinois Charter Member since November 2004
 
Posted by Crazyhorse Rod Shop  -  08/09/2008 10:19 AM
i'll just pass on all the aftermarket stuff and run a 200. better box anyway.
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by brian41chevy  -  08/09/2008 10:44 AM
2004R is a good trans, so is the 700R4. Just a difference of opinion. The early 700 had a lot of problems but, if you are rebuilding one you can make it a very good trans with some fairly minor modifactions. I think the problems start for a lot of guys jumping into automatics thinking they are easy to do. Surprise, they are not. There are a lot of tricks you learn when building them that you will never find in a book. The pressure switch you run in the side port of an early one cost about $15.00 last time I did one.
There is a fine line between hobby and mental illness [ View ] [ Email ] [ Blogs ] [ Car Ads ] New Lenox, Illinois Charter Member since November 2004
 
Posted by jimmothershead  -  08/10/2008 09:11 AM
No lock up ?????????????
Jim [ View ] [ Email ] [ Blogs ] [ Car Ads ] Huntingtown, Maryland
 
Posted by da34guy  -  08/10/2008 10:00 AM
No lock up?? Quick way to burn up a 700 or 200 with out.
Don [ View ] [ Email ] [ Blogs ] [ Car Ads ] Prescott, Arizona Charter Member since October 2001
 
Posted by Crazyhorse Rod Shop  -  08/10/2008 10:07 AM
you can run a 200 without it.
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by Jaybird  -  08/10/2008 10:15 AM
There is no science behind making a 700R4 work with lockup. Lockup is one of the main reasons for using a 700R4 ot2004R. Especially these days. Here is all it takes
Jaybird [ View ] [ Email ] [ Blogs ] [ Car Ads ] Cincinnati, Ohio Charter Member since December 2003
 
Posted by aosborn  -  08/10/2008 12:04 PM
I tend to prefer the 700r4 mainly because I like the lower first gear 3.06 compared to the the 200-4r's 2.74. That allows me to use a higher rear axle ratio (lower numeically) for cruising on the top end. (The overdrive ratios of the two transmissions are nearly the same, .7 compared to .67). I don't run the lock-up typically because I don't want to run the chance of having a lock-up clutch disentigrate through my transmission especially when running some decent horsepower. If you are heads-up enough to disengage the lock-up when you are putting your foot in it, that is fine. I just choose not to mess with it.
aosborn [ View ] [ Email ] [ Blogs ] [ Car Ads ] Olympia, Washington
 
Posted by Crazyhorse Rod Shop  -  08/10/2008 12:16 PM
for cruzin speed i think i would go by od and tire size to pick a gear, not first gear. i just like the clutch pack for 4th gear. to each his own
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by aosborn  -  08/10/2008 03:46 PM
I agree shine, as the OD on the two transmissions are nearly identical as I noted above, OD ratio and tire circumference are the key factors in calculating cruizin speed, but with the lower first gear in the 700 you can get off the line quicker.
aosborn [ View ] [ Email ] [ Blogs ] [ Car Ads ] Olympia, Washington
 
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