4.44 Kia gear into a GSL diff.
03-10-08, 07:53 PM
#1
4.44 Kia gear into a GSL diff.
I bought the gear from LIRX and I am planning to install it, I have searched on the forums for the 4.44 gears BUT I can only find info for the 4.77 since that one is directly bolt on. I was wondering how do I install this into my diff? I have the 'pumpkin', not the whole axle. Any help would be appreciated! 
Mack
Mack
03-10-08, 09:26 PM
#4
I don't know how accurate it is but this is all the info I've collected throught the years on this forum by searching.
oh and I just found this on google!
http://members.aol.com/solomiata/Drivetrain.html
Ok guys you are getting nit picky, here is the exact numbers. 83-84 12a is 3.93, 84-85 se
is 4.076, 85 12a is 3.909, now are you happy, must have a bunch of mechanical engineers here, lol. rx7doctor
I have an Excel spread sheet for working through gearing and tire/wheel sizes and how that affects speed at any combination of RPM and gear. I created it over four years ago and added to it as necessary. It also has a worksheet dedicated to most every combination of ring and pinion gears and the resulting ratio. Strangly, I can't figure out how to get a 4.076 ratio...I can get 4.077 (53/13) and 4.083 (49/12), but it takes a lot of teeth. Anyway, here is the link if you want to download it: RPMSpeed.XLS.ZIP.
Besides the stock ratios, alread discussed, are the 4.444, 4.875 and 5.125 for 1st gens. They were not stock on any models, but developed for racing and available through MazdaSpeed and elsewhere (Mazdatrix, etc). Of these, the 4.875s (aka 4.88s) are my favorite. They really wake up a 1st gen, multiplying the torque we have. First gear becomes an afterthough but, otherwise, the stock transmission feels like a close-ratio box. I have used 4.88s on my old peripheral port 13B and more recently on my stock 12A 1st gen...more smiles per miles. Retail prices are pretty steep but if you do a couple autocrosses a year and, thus, qualify for the Mazdaspeed Team Support Program, the prices are drastically lower...under $300 for 4.88s, last time I checked. I got mine for $100 used.
I believe 4.78 can be found on Kia Sportage.
The 4.44 can be found on a early 80's Mazda 4x4 pickup. Use the FRONT differential...
Additionally 4.30 can be found in 99+ Miatas.
Any ring and pinion that will fit a 94+ Miata will fit the RX-7...
Front Diff of early/mid 80's 4wd Mazda truck: 4.44:1
1994+5 speed Miata: 4.30:1 (Added bonus of a Torsen that should fit 84/85 RX-7's)
Kia Sportage: 4.88:1
is 4.076, 85 12a is 3.909, now are you happy, must have a bunch of mechanical engineers here, lol. rx7doctor
I have an Excel spread sheet for working through gearing and tire/wheel sizes and how that affects speed at any combination of RPM and gear. I created it over four years ago and added to it as necessary. It also has a worksheet dedicated to most every combination of ring and pinion gears and the resulting ratio. Strangly, I can't figure out how to get a 4.076 ratio...I can get 4.077 (53/13) and 4.083 (49/12), but it takes a lot of teeth. Anyway, here is the link if you want to download it: RPMSpeed.XLS.ZIP.
Besides the stock ratios, alread discussed, are the 4.444, 4.875 and 5.125 for 1st gens. They were not stock on any models, but developed for racing and available through MazdaSpeed and elsewhere (Mazdatrix, etc). Of these, the 4.875s (aka 4.88s) are my favorite. They really wake up a 1st gen, multiplying the torque we have. First gear becomes an afterthough but, otherwise, the stock transmission feels like a close-ratio box. I have used 4.88s on my old peripheral port 13B and more recently on my stock 12A 1st gen...more smiles per miles. Retail prices are pretty steep but if you do a couple autocrosses a year and, thus, qualify for the Mazdaspeed Team Support Program, the prices are drastically lower...under $300 for 4.88s, last time I checked. I got mine for $100 used.
I believe 4.78 can be found on Kia Sportage.
The 4.44 can be found on a early 80's Mazda 4x4 pickup. Use the FRONT differential...
Additionally 4.30 can be found in 99+ Miatas.
Any ring and pinion that will fit a 94+ Miata will fit the RX-7...
Front Diff of early/mid 80's 4wd Mazda truck: 4.44:1
1994+5 speed Miata: 4.30:1 (Added bonus of a Torsen that should fit 84/85 RX-7's)
Kia Sportage: 4.88:1
http://members.aol.com/solomiata/Drivetrain.html
03-11-08, 02:37 AM
#6
my fb is older than me
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are u talking bout ring or ring and pinion. i think wat they mean is aslong as its a 7in ring gear it should bolt on. just watch for backlash and end play?
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03-11-08, 08:16 PM
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dude. part 9 of the factory service manual....and yes you're "new" pumpkin will bolt up- just remove your old one, and put the new one in- if you want LSD then you can swap over your clutch pack(would also be a good time to rebuild it...)- or go cheap n easy and weld your spider gears...search for it in the archive. its there- its the same exact thing as doing the 4.77's theres even a write up...
good luck and have fun- burnout in front of the neighbor's houses...and stop signs...and wherever johnny law isn't lurking!
zach
good luck and have fun- burnout in front of the neighbor's houses...and stop signs...and wherever johnny law isn't lurking!
zach
03-12-08, 01:01 AM
#13
here is the late Blake's XLS in RAR format. so get winRAR to unzip it.
I have added some other gear raitos to the referance table
http://www.mediafire.com/?gnamzgwyggf
for future searchers: 4.44 kia diff, 4.72 LSD, open diff
I have added some other gear raitos to the referance table
http://www.mediafire.com/?gnamzgwyggf
for future searchers: 4.44 kia diff, 4.72 LSD, open diff
04-29-13, 10:56 PM
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I know its an old topic but i have a 82gsl and am looking for 4.44 gear. 82 has smaller axels will it still work? And i will swap my lsd in. Also is it possible to do this in under four hours cuz im currently in axel/ diff classes. Thank you all pm me plz i dont check here often.
05-23-13, 10:46 AM
#19
Respecognize!
basically there are some considerations to be made.
you can do the following...
1. bolt in the 3rd member directly into your 84/85 axle housing, slide the axles in and go wtih an open diff.
2. with the kia third member, leave the pinion in it, take out the ring and diff, and the change the ring over to a LSD unit of whatever bearing size you require, or get a Kaaz! and then reassemble.
3. take the ring and pinion out of the kia third member and reinstall into the mazda third member. This has the benefiet that you cannot buy the kia sportage differential seal if you have a leaky one. At least i wasn't able to find one anywhere.
also tighten up the backlash the Kia comes with! put it to rx7 specifications.
