Hey all, as a couple of you might know, I attempted to fit an AW03-72L 4 speed into my gemini a little while ago, after getting pretty much no help from local transmission specialists who apparently had "more important jobs on" I couldn't complete the conversion.
I have been looking about and am now considering an AW03-70 from the twin cam, as the twin cam can swap gearboxes with gemini's in regards to 5 speeds and all, I'm thinking this may be easier to fit, anyone have any experiance with this box?
any obvious obsticals?
AW03-70 vs AW03-72L
Common conversion over here is to fit G200z sohc engine and box into gemini as it is a straight drop in fit. The dohc G200w engine fits as well as long as you have the matching gearbox of course. You can't fit a twin cam box to single cam engine as the starter mounts on the other side, at least it is that way on the manual so I can't see the auto being any different. Is your gemini a twin cam?
So many cars, so little cash
looks like I'll have to keep searching for a tranny builder that will build the converter, ive seen 2 trimatics made to fit behind the 4z series motors but I seem to be the only person who wants to do it the other way round, the local shops don't want to help.Now I am confused, the auto box from a turbo 4zc1 engine and G200z engine are interchangeable, as is the manual box. You could take a Piazza turbo or non turbo SOHC 4zc1 or G200z auto or manual and shove it straight into your Gemini. Auto boxes are ten a penny for these so i don't see the problem. The only difference is the flex plate where it bolts to the crank as the bolt up is different number of holes and centres, plus if you have a manual crank you need to remove the spigot bearing and fit the centering bush for the TC. The gearbox crossmember may end up in a different place but the centre mount on the crossmember is easy to modify. Finding a manual 5 speed in good nick is harder but Rodeo boxes can be made to fit i believe. Rodeobob is the expert on this, in fact he is an expert on everything or so he keeps telling us, LOL sorry Bob.
If you are trying to fit a DOHC box of either type to G200z you are in big dollar country to convert the bell. For me anything over fifty bux is big dollar country by the way.
If you are trying to fit a DOHC box of either type to G200z you are in big dollar country to convert the bell. For me anything over fifty bux is big dollar country by the way.
So many cars, so little cash
nah it's from a turbo single cam, and theres more to the swap than the flywheel, there are clearances that also need to be set as I believe the 4z series motors have the flywheel pushed further into the bellhousing than the g series motors, not to mention that as the 4z flywheel doesn't fit the g series crank then I also have to run a half and half construction of the stall converter. this is the part that no'one seems to weant to help me with.
edit: I realise I have substituted the word flexplate with flywheel, am too lazy to go back to edit it all, please forgive.
edit: I realise I have substituted the word flexplate with flywheel, am too lazy to go back to edit it all, please forgive.
That's news to me, I have changed boxes willy nilly between turb and non turbo and had no problems. I have three auto boxes sitting on my shelf at the moment, two non turbo from G200z and one from turbo 4zc1 and i can assure you there is no difference between them as far as internal dimensions go unless they did something strange with the YB model.4z series motors have the flywheel pushed further into the bellhousing than the g series motors, n
If you get a g200z flex plate and TC centering bush you should be able to bang it straight in, if you have some info to the contrary I would be interested to know about it for sure. I also have a 4zc1 and G200z engine on the floor plus flex plates, flywheels etc so I can probably check any measurements you want. I also have a drawing of the centering bush if you need to get one made. You will also need the flex plate spacer to set the plate in the correct position which I can also give you details of.
So many cars, so little cash
you should be okay if it is Piazza flexplate and TC. Remember to ensure the TC is fully located in the box and secure before presenting. I always make sure I get the second click and double check the face measurement to be sure. If you have a trimatic you may have propshaft issues unless you have the piazza shaft but even then you may have to alter it. In the 4zc1 the engine and box assembly sits further forward than in the G200z and hence has a slightly longer prop shaft. On the early Isuzu cars they kindly provided two sets of holes in the chassis so the same shell could be used for either version. There were two spline sizes as well with the later ones having a larger output shaft.
From the front bolting face of the bell housing back to the face of the lugs the flex plate bolts to, should be about 32mm if it is properly located. A mm either way is okay so don't get to picky but if it is 5-10mm shorter than that it probably hasn't engaged properly. best of luck, they are a heavy little son of bitch. I did a Jag xj6 tranny change recently and its auto box was half the weight!!!!!
From the front bolting face of the bell housing back to the face of the lugs the flex plate bolts to, should be about 32mm if it is properly located. A mm either way is okay so don't get to picky but if it is 5-10mm shorter than that it probably hasn't engaged properly. best of luck, they are a heavy little son of bitch. I did a Jag xj6 tranny change recently and its auto box was half the weight!!!!!
So many cars, so little cash
yeah that's what Ive been having trouble with, gemini flex plate and piazza torque converter don't mate together and visa versa for the piazza plate and gem converter, and seeing as the piazza plate won't fit the g200 crank what else can I do?
I had hoped originally thata transmission shop would lop the original feet off the converter and weld new feet on to make it fit the g200 plate.
I had hoped originally thata transmission shop would lop the original feet off the converter and weld new feet on to make it fit the g200 plate.
Would it not be better to drill the flex plate to suit the TC?
Is it because you have the flex plate from a 4zc1 turbo piazza? Could i interest you in a G200 flex plate? I can check it fits the piazza turbo TC first if you like as I have both types of flex plate and TC here to compare.
Is it because you have the flex plate from a 4zc1 turbo piazza? Could i interest you in a G200 flex plate? I can check it fits the piazza turbo TC first if you like as I have both types of flex plate and TC here to compare.
So many cars, so little cash
the car has the full stock trimatic setup but it's running behind a warm n/a g200z.
even if I redrilled the flex plate theres still the issue of getting a spacer to fit like the piazza plate has.
I do have a tc and flex plate to suit the box but elky is still trying to find them amongst his stuff but I'm not really rushing him at this stage as the new engine must be completed before the trans needs to be fitted.
even if I redrilled the flex plate theres still the issue of getting a spacer to fit like the piazza plate has.
I do have a tc and flex plate to suit the box but elky is still trying to find them amongst his stuff but I'm not really rushing him at this stage as the new engine must be completed before the trans needs to be fitted.
yeah thank's that'd be great, would I have to get the tc locator bush made to suit or do you think the stock gemini item would do the job?
I'm just thinking if the spacer plate moves the plate 16mm or so from the crank face then thats 16mm less of the bush inserted into the crank.
I could always take the flexplate in and have them remove the original locator and make a spacer/locator in one that they could reattach to the plate.
I'm just thinking if the spacer plate moves the plate 16mm or so from the crank face then thats 16mm less of the bush inserted into the crank.
I could always take the flexplate in and have them remove the original locator and make a spacer/locator in one that they could reattach to the plate.
Just measure the locater bush to see how it compares, the part that presses into the crank is 40 dia and 14.5mm long. It steps down to 34mm dia to suit the inside dia of the flex plate for 22mm long. The ID of the bush is 28mm dia to accept the locating boss of the TC.yeah thank's that'd be great, would I have to get the tc locator bush made to suit or do you think the stock gemini item would do the job?
I'm just thinking if the spacer plate moves the plate 16mm or so from the crank face then thats 16mm less of the bush inserted into the crank.
I could always take the flexplate in and have them remove the original locator and make a spacer/locator in one that they could reattach to the plate.
The spacer plate functions as far as i know is to set the flex plate in the right position for the starter (to duplicate where the ring gear sits versus std manual flywheel) and alos set it correctly for bolting the TC to. Without it the TC won't sit far enough into the box and you will cry when it shits itself. It is actually 20.4mm thick x 50mm ID to suit the spigot on the end of crank and 95mm OD. Be careful though as the PCD is not symmetrical. If you measure carefully you will see that there is an indexing offset, very slight but still not uniform. If you take the ring washer on the standard flywheel and rotate it around you will see what i mean so if making a spacer make sure you match it to the flywheel or washer and choose the right pozi when fitting.
There is no locater attached to the flexplate. Locater is pressed iinto crank.
Have fun
So many cars, so little cash