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-   -   Ok... got a motor with an auto tranny... what do I use to put a manual tranny on? (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/ok-got-motor-auto-tranny-what-do-i-use-put-manual-tranny-651687/)

jeremyb 05-12-07 08:53 PM

Ok... got a motor with an auto tranny... what do I use to put a manual tranny on?
 
I bought my friend's motor that had an auto. tranny on it. But I got a manual. What will I need to run the manual tranny? I'm not trying to do a auto. - manual conversion or anything my whole car is set up for a manual. I just want to know what do with the the motor part of it. Do I just leave everything how it is including the counterweight thats on it and just put on a lightweight flywheel? Or should I take off the counterweight and put my stock flywheel and clutch back on from my old motor? I did a search but I'm still a little iffy on everything so I just want clarification. I read about using the counterweight thats on there and leave the big nut alone and just bolt up a lightweight flywheel on there?TIA

Jeremy

rynberg 05-12-07 09:01 PM

The auto-to-manual swap info linked in the FAQ thread should contain all the info you need to do this.

jeremyb 05-12-07 11:17 PM

wow... i searched but never though about faq lol. thanks dude...i'll check there... also I still haven't seen you car around san leandro... only seen a black one.

CantGoStraight 05-12-07 11:40 PM

I think you can use an auto motor on a manual tranny but not the other way arround, something to do with the rear plate bolt hole difference. You'll deffinately need the manual fly wheel but without the counter weight.

jeremyb 05-13-07 01:50 AM


Originally Posted by CantGoStraight (Post 6934935)
I think you can use an auto motor on a manual tranny but not the other way arround, something to do with the rear plate bolt hole difference. You'll deffinately need the stock flywheel but without the counter weight.

Ok see now this is where I get confused. In the FAQ auto to manual write up they just say they get a lightweight flywheel. But you're saying I gotta take off the counterweight and use my stock flywheel. I'm trying to stay away from that nut. This is why I want clarification on what I need to do. If its possible to just put a lightweight flywheel and leave the counterweight/nut alone, that's what I want to do. I just want to make sure before I start ordering/doing stuff.

Jeremy

CantGoStraight 05-13-07 07:06 AM

The auto engine has a flex plate not a flywheel. If your going to run a lightened flywheel then you'll need the auto counter weight. The big nut has to come off to swap these parts. You need to be more specific about what your doing if you want reliable information.

rexhvn 05-13-07 08:13 AM

Make sure you use the manual wiring lol... the previous owner of my FD done an auto - manual swap and accidently put auto wiring, the result is jercking at low speeds...

jeremyb 05-13-07 11:23 AM

CantGoStraight - I bought a motor from my friend that had an automatic transmission. And his block and everything is still together. Is there a way to check to see if I have an auto. counterweight on the motor? The motor was supposedly never taken apart but I'd like to double check. And I think you just answered my question... it was to know if I can leave everything how it is and just put a lightweight flywheel.

rexhvn - I'm using the wiring harness from my old motor. My whole car is set up for a manual transmission. So I'm using everything from my old motor except the block I bought from my friend that had an auto. trans on it of couse.

Jeremy

silverflash2 05-13-07 12:02 PM


Originally Posted by rexhvn (Post 6935468)
Make sure you use the manual wiring lol... the previous owner of my FD done an auto - manual swap and accidently put auto wiring, the result is jercking at low speeds...


I did the auto to manual swap, and used my auto wiring harness, and it's been 4 years,with no issues. Just to let you know, it can run right with the auto wiring.

jeremyb 05-14-07 12:52 AM

Ok, I'm just gonna buy a lightweight flywheel... bolt it to the counterweight thats already on the motor that had a auto. trans on it before. And then buy an aftermarket clutch for it also and it will work. Correct? Yeah? See technically... I'm still not getting a straight answer lol. Even in the links in the FAQ. I just wanna simply know if I can use the auto counterweight thats already on the motor and just bolt up a lightweight flywheel and be able to use a clutch and manual trans. with no problem.

Jeremy

Edit: Is there a way to check to see if the counterweight you on have is for an auto?

GSLSE20B 05-14-07 01:49 AM

eng
 
use the counter weight thats there ... call me if you need any help ..

GSLSE20B 05-14-07 01:53 AM

eng
 
1 Attachment(s)
this should be what you have

Tom93R1 05-14-07 08:52 AM

If there is a rear counter weight then it is for an auto, no such thing as a rear manual weight.

Just unbolt the flex plate from the counter weight and bolt on a light weight flywheel. The counter weight on there should be balanced for your internal rotating assembly already, no need to replace it.

jeremyb 05-14-07 05:54 PM


Originally Posted by GSLSE20B (Post 6938085)
use the counter weight thats there ... call me if you need any help ..

I'll be doing that for sure if I get stuck :icon_tup:


Originally Posted by tom93r1
If there is a rear counter weight then it is for an auto, no such thing as a rear manual weight.

:wallbash: :wallbash: :wallbash: I wish I knew that before. :icon_no2:

Thanks everyone for all your input!

Jeremy

CantGoStraight 05-14-07 06:10 PM

Jeremy,
Depending on which lightend flywheel you run you may or may not need the counter weight. Most of the lighter than IIRC 16lb. flywheels which use the aluminum main plate with a steel insert, you need the auto counter weight. SOme of the after market guys make a completely steel version of the flywheel that doesn't use the counter weight. I believe you will need the proper bolts for the lightened flywheel with the counter weight (the ones that come with the flex plate and counter weight may not be long enough to use with the lightened flywheel and counter weight, you should be able to use any after market clutch and pressure plate manufactured for our model manual transmission. You'll have to see if some one else can confirm it but I believe the auto rea plate will have one bolt missing going from the manual transmission to the engine rear plate but shouldn't be a factor. There should be plenty bolting area between the motor and tranny. Hope this clears anything up for you, now just do your home work and decide which lightened fly wheel your going to buy.

jeremyb 05-14-07 07:11 PM

Well I just ordered a ACT prolite flywheel which is 9.5 so from your info the auto counterweight thats on there should be ok how it is. And as for the bolts for the flexplate, the flexplate was removed but there are bolts threaded into the counterweight just enough to keep them in there. I believe those are the counterweight bolts. Hmmmm... does anyone know the size of the supersize nut? I forgot what size it was when I tore my other motor apart... all I remember is I bent a snap-on breaker bar and put stress marks on a 7 ft. angle iron lol. I wanna double check the torque on that nut as I did on the tension bolts but I don't have a wrench that goes that high. Should I just gun the hell out of it?

GSLSE20B 05-15-07 01:02 PM

nut
 
350 lbft ...use a two foot bar and stand on it .... i have a special jig i made for removing that bolt with the engine on the ground .. it holds the engine in place so it doesnt roll while the bolt is being turned ...


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