for you 8.8 rear people - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 12-30-2012, 04:40 PM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 67
Total Cats: 0
Default for you 8.8 rear people

i came across a ford 8.8 ird 31 spline.... searching for axles, all i find are 28 splined ones..... can anybody recommend me some? i like how the driveshaftshop does theres where it plugs right into the diff and the miatas hub unbroached..... but yet again its 28 spline.

thanks for the recommendations in advance.
sh4d0wf0xxx is offline   Reply With Quote
Old 12-31-2012, 10:20 AM   #2
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Just look for a 28 spline 8.8. They are everywhere for $100. Just find a V8 Thunderbird in the junkyard. Heck, I bought the whole car for $100, kept what I wanted and scrapped it for more than $100. Keep it simple.
Stein is offline   Reply With Quote
Old 12-31-2012, 11:43 AM   #3
Senior Member
iTrader: (1)
 
BogusSVO's Avatar
 
Join Date: Mar 2012
Location: Pensacola Fla.
Posts: 590
Total Cats: 191
Default

31 spline axls are commonly found in the Ford Truck, van, SUVs

28 spline is common in mustangs and thunderbirds, and rangers.
BogusSVO is offline   Reply With Quote
Old 12-31-2012, 12:33 PM   #4
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

sh4d0wf0xxx: Are you looking for 8.8 IRS stuff or an 8.8 stick axle? Ford made both
EO2K is offline   Reply With Quote
Old 12-31-2012, 12:58 PM   #5
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 67
Total Cats: 0
Default

i am looking for 31 splined inboard halfshafts that have the outboard to fit the miatas hub
sh4d0wf0xxx is offline   Reply With Quote
Old 12-31-2012, 01:21 PM   #6
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

So IRS then. I've got more experience with the solid axle version and was going to hassle you if you had intended to put one in a Miata

I thought all the IRS stuff was 28 spline? This exceeds my knowledge with the IRS 8.8. You may want to check out Boss Frog or V8R or other V8/LSx swap Miata outfits, I'm betting they will have more infos.
EO2K is offline   Reply With Quote
Old 12-31-2012, 01:40 PM   #7
Newb
 
Join Date: Oct 2011
Location: The 253
Posts: 32
Total Cats: -3
Default

Where did you get a 31 spline IRS? I didn't think that was possible either...

EDIT: Looked at my books, seems that was a Cobra rear diff and a possible 4X4 tow package Exploder.

Might want to find a 28 center, Even tho it will be weaker, but be cheaper/easier.

Mustang guys explode the 28 spline when they stick some slicks on a stock car. I'd rather run the 31.
trackslut is offline   Reply With Quote
Old 12-31-2012, 02:05 PM   #8
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by trackslut View Post
Mustang guys explode the 28 spline when they stick some slicks on a stock car. I'd rather run the 31.
How many of the LSx Miata guys are doing this? I was under the impression the Thunderbird IRS 8.8 or the Getrag IRS from a CTS-V were the hot swaps for the LSx crew.
EO2K is offline   Reply With Quote
Old 12-31-2012, 02:11 PM   #9
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Quote:
Originally Posted by EO2K View Post
How many of the LSx Miata guys are doing this? I was under the impression the Thunderbird IRS 8.8 or the Getrag IRS from a CTS-V were the hot swaps for the LSx crew.
They are. The 8.8 is a bit stouter than the CTS-V diff, plus there are eleventy billion gear options and gears are cheap, plus the diff is cheap.
Stein is offline   Reply With Quote
Old 12-31-2012, 02:22 PM   #10
Senior Member
iTrader: (1)
 
BogusSVO's Avatar
 
Join Date: Mar 2012
Location: Pensacola Fla.
Posts: 590
Total Cats: 191
Default

Most of the info I have shows the 28 spline will go just about 400tq and traction before it pops.

The stock 5.0l block cracks in the lifter valey about the same point.

I rebuilt the stock 7.5/28 spline in my T-bird, I figured it would be a bit till I hit 400tq with hook.
The bird weighs 3640lbs too....

Unless you are one the big boys putting down big numbers, I would have to agree, shelf the 31 spline diff, and grab up a 28spline, since you can find the stubs you need/want easier.
BogusSVO is offline   Reply With Quote
Old 12-31-2012, 04:29 PM   #11
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

I feel like you should be able to call drive shaft shop and they should be able to make you some custom axles.
Leafy is offline   Reply With Quote
Old 12-31-2012, 04:46 PM   #12
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by trackslut View Post
Mustang guys explode the 28 spline when they stick some slicks on a stock car.
Quote:
Originally Posted by EO2K View Post
How many of the LSx Miata guys are doing this?
Quote:
Originally Posted by Stein View Post
They are. The 8.8 is a bit stouter than the CTS-V diff, plus there are eleventy billion gear options and gears are cheap, plus the diff is cheap.
Stein: I assume you mean they are using the 8.8, not blowing up the 8.8? That's my fault for not being clear enough. I was under the impression that the lighter weight of the Miata lets you get away with more than the Mustang guys can.

Either way, OP: Y U 8.8?!
EO2K is offline   Reply With Quote
Old 12-31-2012, 06:41 PM   #13
Elite Member
iTrader: (12)
 
Join Date: Apr 2008
Location: Springfield IL
Posts: 2,750
Total Cats: 24
Default

Forget the 8.8 swap. Get a 7.5 swap from Martin and be done. You can tuck it up further, as they are oval shaped where the 8.8 is more round.

Ford Driveshaft Flange Yoke fits 7.5 and 8.8 inch Rear Ends 1310 Series with small Ford bolt pattern

http://www.southwestspeed.com/?sec=view_menu&cat=Drivetrain&sub=Driveshafts&ssub =!3\" Aluminum Driveshafts

The Driveshaft Shop | MAZDA 1989-2005 Miata with Ford 8.8 Rear Conversion 400HP Direct Bolt-In Axles - Miata - Mazda - Import Axles

Copy/paste the link for the driveshaft. You should be able to get a front yoke from the driveshaft shop.
chpmnsws6 is offline   Reply With Quote
Old 01-01-2013, 01:56 AM   #14
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

I got my yoke from Southwest Speed when I got my driveshaft. Pretty cheap. Ford T5, tho.
Stein is offline   Reply With Quote
Old 01-01-2013, 06:43 PM   #15
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,107
Total Cats: 48
Default

Quote:
Originally Posted by chpmnsws6 View Post
Forget the 8.8 swap. Get a 7.5 swap from Martin and be done. You can tuck it up further, as they are oval shaped where the 8.8 is more round.

Ford Driveshaft Flange Yoke fits 7.5 and 8.8 inch Rear Ends 1310 Series with small Ford bolt pattern

http://www.southwestspeed.com/?sec=view_menu&cat=Drivetrain&sub=Driveshafts&ssub =!3\" Aluminum Driveshafts

The Driveshaft Shop | MAZDA 1989-2005 Miata with Ford 8.8 Rear Conversion 400HP Direct Bolt-In Axles - Miata - Mazda - Import Axles

Copy/paste the link for the driveshaft. You should be able to get a front yoke from the driveshaft shop.

more info on the 7.5 swap please
ctdrftna is offline   Reply With Quote
Old 01-01-2013, 09:43 PM   #16
Junior Member
 
Join Date: Oct 2010
Location: las vegas
Posts: 244
Total Cats: 4
Default

Quote:
Originally Posted by ctdrftna View Post
more info on the 7.5 swap please
Differentials -
hochkis is offline   Reply With Quote
Old 01-01-2013, 11:42 PM   #17
Elite Member
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Is that 7.5" a drop in kit for 950? Or does it need some fab work?
miatauser884 is offline   Reply With Quote
Old 01-02-2013, 12:48 AM   #18
Junior Member
 
Join Date: Oct 2010
Location: las vegas
Posts: 244
Total Cats: 4
Default

Quote:
Originally Posted by djp0623 View Post
Is that 7.5" a drop in kit for 950? Or does it need some fab work?
I think you just have to set the pinion angle.
It's setup for a V8 conversion though so you would need a custom driveshaft and some way to delete the PPF.
hochkis is offline   Reply With Quote
Old 01-02-2013, 10:19 PM   #19
Newb
 
Join Date: Oct 2010
Posts: 17
Total Cats: 0
Default

I've been tossing ideas for an 8.8 rear swap with otherwise stock miata drivetrain. Not sure if it's been done (haven't really searched) but I do know that some guys who put the 8.8 in Camaros end up welding torque arm (PPF) mounts to the housing. I've also considered fabbing a traditional transmission crossmember in place of the PPF...
MWatson17 is offline   Reply With Quote
Old 01-02-2013, 11:04 PM   #20
Elite Member
iTrader: (12)
 
Join Date: Apr 2008
Location: Springfield IL
Posts: 2,750
Total Cats: 24
Default

Live axle in the F-body. We are talking IRS diffs. Less mullet friendly.
chpmnsws6 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:56 PM.