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Ken Heising (aka Ken_tech) [ View ] [ Email ] [ Car Ads ] [ Blogs ] Fairfax, Virginia

My street rod came to me with the 700R4 lockup wire disconnected. My mechanic noted this, and he connected the wire. Then the car would not shift into 4th gear at all. So, it was disconnected. 4th gear is back, but I don't believe I have a lockup in 4th. Two questions: 1. why would a builder set up a 700R like the one in my car with no lockup function? and 2. how to achieve lockup function? Will the Painless wiring vacuum switch (discussed recently) work in my situation? http://www.jegs.com/i/Painless/764/60109/10002/-1 (I am thinking not, as my trans doesn't seem to respond to the stock wiring.) Attached is a pix of the wiring on my 700. thanks, Ken

Comments

Posted by brian41chevy  -  04/11/2008 08:54 PM Ken that apears to be a neutral safety switch at your shift linkage. That has nothing to do with locking up the convertor. 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  -  04/11/2008 03:44 PM i dont know who did it or what they did to it but a 700 without lock up is scary. i no longer use the 700 but i was always told it had to lock up or it would cause damage. am i right brian? i know a little about the 200 but had really bad luck with the 700 so i switched. on the 200 there is a plastic 4 pin plug on the side. the ign hot goes to the top left pin. dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003   Posted by brian41chevy  -  04/11/2008 04:13 PM That would be correct. I have seen them run without the lock up feature but question why you wouldn't take advantage of that feature. Show me a picture of the right side of the trans so i can see if you have a early or a later model. Then I can let you know which route to go to cure the problem. 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  -  04/11/2008 04:15 PM it's sure nice to have a trans man around dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003   Posted by bigdude  -  04/11/2008 05:08 PM Then why wont mine shift right? DAMN IT! Brian---- up off your ass and do something! Dont make me ask the poor teacher. resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004   Posted by Crazyhorse Rod Shop  -  04/11/2008 05:26 PM where you at with yours ? i take it removing a spring did not help. you may have to change govnors altogether. dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003   Posted by Crazyhorse Rod Shop  -  04/11/2008 05:31 PM where you at with yours ? i take it removing a spring did not help. you may have to change govnors altogether. dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003   Posted by bigdude  -  04/11/2008 05:43 PM I havent got that far yet-still trying to adjust it with the cable. Its got to be the governor thats doing that-PITA to get to on this. Just trying to be sure before I throw a fit! resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004   Posted by Ken_tech  -  04/11/2008 06:27 PM Brian, here's a pic, mostly from underneath. Is this sufficient? Trans likely purchased in 2002 if it was new equipment. Car was finished in 2003. Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia   Posted by Ken_tech  -  04/11/2008 06:58 PM Brian, new pix from the right side. Does MD8 mean anything? Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia   Posted by Ken_tech  -  04/11/2008 07:18 PM Brian, See attached. The neutral safety switch is the item circled in blue, correct? What is the disconnected wire circled in red? thanks, Ken Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia   Posted by brian41chevy  -  04/11/2008 08:49 PM Ken what you have circled in blue is the neutral safety switch. What you have circled in red looks to be one of the wires from the lock up switch. If you look a little further back from the neutral safety switch, you will see a plastic four gang female switch. That is your switch for the lock up. It is very hard to see from the pictures where that wire is running to. If you go to www.bowtieoverdrives.com you can get a clear picture of this connector and also a wiring diagram of how it is wired. You may want to start from scratch with a wiring kit. It doesn't matter if it's from Ron Francis, Painless or Bowtie, they will all work fine. It is not a hard job to hook this up, just be patient. You create extra heat in the trans when you do not run the lock up. Heat is bad for automatics. If you have questions shoot me an e-mail and I'll send you my phone # 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 brian41chevy  -  04/11/2008 08:56 PM Shine I have now been out of the trans bussiness longer than I was in it. However I still do them on the side for friends and poor school teachers Bigdude, what is your trans not doing and what do you have in there now? 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  -  04/11/2008 09:02 PM i think big d needs another govnor. quick 1-2 shift and legging out the 2 3 . dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003   Posted by bigdude  -  04/11/2008 09:39 PM I am going to a union meeting tomorrow-will dive under it sunday. resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004   Posted by Ken_tech  -  04/11/2008 09:45 PM Brian, I will check out the wiring diagrams at bowtieoverdrives.com and see if I can find where my red-circled wired originates. Many thanks for your help! I have plenty of patience. I may still need to give you a call. best regards, Ken Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia   Posted by CHEVYSLEDD  -  04/12/2008 01:42 AM MD8 is gm option code for 700r4 or 4l60 I have my trans wired to a relay that kills the power when I hit the brakes works great and have put this set up in 4 cars no problems. I use a kit from gm that I get the 4 pin connector out of it has only 1 wire out of the plug. I can get the wire diagram from my car if you need it. CHEVYSLEDD [ View ] [ Email ] [ Blogs ] [ Car Ads ] SCOTTSDALE, Arizona   Posted by Crazyhorse Rod Shop  -  04/12/2008 08:40 AM it will be an ign hot. the brake lite switch should trigger a relay to unlock or they could have used a vac switch. sounds like you have an internal problem though. cant think of a reason for it not to shift. i'll check with mike at trick shift. he does a bunch of hp 700's. dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003   Posted by Ken_tech  -  04/15/2008 10:19 PM Good news to report. Mike, a rodder I met last year at the Mother's Day Rod Run recommended a friend of his to look at my trans and Rick had time to look at it today after work. He worked on it for an hour and made some improvements. He confirmed the lead to the trans was 12 volts. When I told him that when the lead was connected to the trans, that I lost 4th gear, he found that pretty surprising. So did Bowtie Overdrive. They said my trans was "acting weird". Rick drove the car and agreed it was not shifting quite right, i.e., lazy. He adjusted the TV cable, we drove it, but no better. Then he backed off the TV cable almost completely, as an experiment, and the car shifted much better, esp. under light throttle. The trans is not acting right. Rick will drop the pan and take a better look sometime in May, as he has 3 cars ahead of me. I'm fine with that. So, I am pleased with the progress today. Very relieved to find a knowledgable experienced mechanic with the 700. Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia   Posted by brian41chevy  -  04/15/2008 10:21 PM Hands on will beat e-mail and phone calls everytime Ken. Glad you found someone nearby to take a look at it. 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 Ken_tech  -  04/15/2008 10:58 PM Brian, Shine, ChevySledd, all you guys -- thanks for your help, as well! Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia   Posted by jimmothershead  -  04/16/2008 08:52 AM Ken.....I always use a Ron Francis TC-70 converter lockup module. It is adjustable for the desired speed. Or you could get a Radio Shack 89 cent toggle .....a few months later, hello $1100 trans rebuild. With no power to the converter, it will not lock up, but all gears should shift OK. The TV cable needs to be adjusted. Also, the TV cable MUST be actuated in the same arc as the original TPI. What carb do you have? I may have a spare adapter plate for the carb. If I don't, Fourth Gear has them. Jim said it. Jim [ View ] [ Email ] [ Blogs ] [ Car Ads ] Huntingtown, Maryland   Posted by Ken_tech  -  04/16/2008 09:42 PM Jim, I have a Edelbrock 600 CFM electric choke carburetor, model 1406. thanks, Ken Ken_tech [ View ] [ Email ] [ Blogs ] [ Car Ads ] Fairfax, Virginia

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