Final drive - swap

[Kimitech]

Hello,

has anybody changed a final gear ratio on a 6 speed MR2 from 3,941 to 4,312? Or is here anybody who just made swap of the final drive because I´m looking for some sort of photo guide.
Idea is to use MR2 gearbox and modify it for better utilization with 2zz engine.
Of course, the usual solution could be using a C60 box but it has no LSD (needs to be opened as well) and yet it has too much short final drive. On that basis it´s easier just to swap the final drive on MR2 6 speed.

Thanks
Kamil

[Alex Knight]

If you can calculate that the MR2 'box with a shorter final drive will keep the engine in lift, then I guess it's up to you. Either solution would work.

Hangar 111 do a final drive here:  m http://www.hangar111.com/shop/lotus-2-e ... arbox.html m

But at that price, it MILES more cost effective to retro-fit an OEM LSD into a 2ZZ 'box.

[Kimitech]

Look at it in this way - you dont have to swap shifting mechanism and LSD, just a final drive gear.
Only thing I would like to see is a photo guide - in case somebody has already swapped final drive on this gearboxes.
To find the 4.312 final gear should not be a huge problem.

[Kimitech]

Would be really nice to have some video of just how the MR2 2zz behave with stock C60, C66 and some modifications of original box for example. I mean no crazy 0-60 vids etc. just a cruising at aroun 130 kph on 6th gear and some sort of acceleration during 1 - 5 th gear.
Especially like the idea of C60 gearing with C66 (3.941) final drive which could give the car nice acceleration plus low cruising rpm´s on the 6th gear. Can somebody confirm this theory?

Alex, what setup are you driving now talking about the gearbox?

[Pete C]

Final drive is bolted to the diff so you'd have to open up the box and perform basically the same procedure as swapping the LSD.

[Kimitech]

Nope. Just swap the 2nd, 3rd, 4th and 5th gear from C60 box. The 1st and 6th, which are the same (as those in C60), would be retained from C66.

[Alex Knight]

Alex, what setup are you driving now talking about the gearbox?

I'm using the stock Corolla T-Sport C64 with open differential.

[Kimitech]

I think it is possible to swap gears (2., 3., 4., 5.) from C60 box to MR2 (C66) box, isn´t it? I mean the only isue could be a different diameter of shafts which I don´t suppose.

[vinp182]

I think it is possible to swap gears (2., 3., 4., 5.) from C60 box to MR2 (C66) box, isn´t it? I mean the only isue could be a different diameter of shafts which I don´t suppose.

I helped Steve M Uk swap the gears from a celica box into an mr2 box a year or so ago... Wasn't that hard tbh but Steve knew exactly what he was doing

[Kimitech]

But I mean swapping gears from C60 box onto C66 shaft.

Anyway, does anybody know the number of teeths on pinion and diff gear regarding C60 and C66 boxes?

[cabbydave]

The c60 and c66 have different final drives depending on whether its UK/Europe or JDM. Look at the Corolla T Sport ratios that might just suite you.

[cabbydave]

Oh and the gears off the C60 will go on the C66 shaft

[Kimitech]

Seriously? Have you ever performed it? It would be great. So basically it is just about finding a donor c60, use necessary gears and assemble them onto c66  input and output shaft.

[cabbydave]

It can be done

[KRAMSNEHPETS]

Hi. I now have most of the bits ready to do my 2zz swop. Is there any info available to help me with the gearbox? I would like to swop the first 5 gears from my celica box into my mr 6 speed so that I have LSD and a motorway friendly 6th gear.

[cabbydave]

Where abouts in the UK are you?

[KRAMSNEHPETS]

Hi, two miles from stansted airport

[Escy]

Hi. I now have most of the bits ready to do my 2zz swop. Is there any info available to help me with the gearbox? I would like to swop the first 5 gears from my celica box into my mr 6 speed so that I have LSD and a motorway friendly 6th gear.

I'm thinking about doing this also.

Are there any special tools needed to remove the gears?

[Kimitech]

Great, the more will be us, the better for other members. Please make a good photo and written documentation.

As far as the tools needed, probably a gear separator, hammer, and a solid surface (desk).

[cabbydave]

Yes you do need special tools works out about £100 plus postage and import duty. I bit the bullet and bought some but I always use the first 5 gears out of the doner box and the mr2 6th gear. It all depends on what box you are going to use a corolla has a 4.5 diff and Celicas vary pending if its a import or not. On the next conversion I do im leaving the diff open as it will be my daily driver and although its nice having a LSD driving down empty A roads with sweeping bends in Cheshire on the way to work I figure with the tyre wear the lsd creates its aa no brainer. However my Sunday car is going o have everything on it slammed full body kit LSD and one day a charger.

[Kimitech]

So chaps, how is it going? Any updates on the C66 box with C60 gearing?

[Escy]

I've swapped 6th gear from the MR2 onto the Celica C60. I had to buy a hydraulic puller to do it. Haven't put it back in the car yet.

[Kimitech]

Sorry, but it might be a bit useless don´t you think? Because C60 and C66 (MR2 EU 6 speed box) uses the same 6th gear: 0.725 ratio.

[cabbydave]

That's if it's a European  box but not if you put it on the jdm celica or corolla  box. The uk box needs the Avensis diesel 6th gear

[Kimitech]

Agreed.

Anyway, I would appreciate some pics and knowledges from swapping the C60 (2,3,4 and 5.th gear) into C66 box as mentioned above.