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Old 10-09-2008, 01:22 PM   #1
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Default throwing in the torsen

Got a torsen type I 4.10 on its way to my house (thanx Ben) and just wanted to get some input on throwing the sucker in to replace my shisty open diff.

Did some searching as well as asking
http://www.miata.net/garage/diff_rr.html

and the one thing Im a little confused about is backlash and measuring everything/aligning to make it fit correctly and not make noise.

Now while Ive taken apart transmissions, I have never messed with a diff before.

When I take off/open my carrier and take out the open diff, does this thing (torsen) just slide right in and go? afaik and since im not replacing the ring/pinion this should be plug and play right?

Just wanna make sure. pardon the noobish question
-Vlad
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Old 10-09-2008, 01:38 PM   #2
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you dont have to worry about that since he's sending it already within a pinion housing.
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Old 10-09-2008, 02:58 PM   #3
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yeah, if it was just the diff tho, its really not that hard to do... infact, i have the micrometer and dial indicator sitting on my desk in my dorm right now cause i just finished my install this weekend.

the biggest problem i had was the PPF bolts were completely stuck, so i ended up taking out the whole ppf with the carrier and doing the swap with it all together
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Old 10-09-2008, 08:37 PM   #4
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thats great. thanx guys
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Old 10-09-2008, 08:45 PM   #5
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Quote:
Originally Posted by Braineack View Post
you dont have to worry about that since he's sending it already within a pinion housing.
He should still check the lash and everything. I wouldn't say "don't worry about it". Who knows if it's correct unless you check it.
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Old 10-09-2008, 09:19 PM   #6
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If he is sending it in a housing, Just hook it up. I would check nothing. You're liable to screw it up.
If it was taken apart, that is completely different.

If it isn't broke. DON'T fix it. lol
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Old 10-09-2008, 09:31 PM   #7
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Quote:
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If he is sending it in a housing, Just hook it up. I would check nothing. You're liable to screw it up.
If it was taken apart, that is completely different.

If it isn't broke. DON'T fix it. lol
-1. It's not hard to check it out. And if he's planning on using the torsen and putting it under high loads that will strain it, you want the diff setup properly. If it's too loose (from being setup improperly or from wear) it will fail and destroy the torsen/R&P/housing. Over 1K in damage easy. That vs. 20 minutes to setup a dial indicator and check the numbers yourself before final assembly. If he finds it's out of spec and is to incompetent to adjust and remeasure it, let a shop set it up for a 100 bucks. 100<1000.
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Old 10-09-2008, 10:46 PM   #8
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he is sending me the pumpkin only, not the whole housing. I will have to take off my carrier, take out the open diff, and throw in the torsen, close it up and reinstall it.
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Old 11-13-2008, 09:31 PM   #9
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still waiting on the torsen
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Old 11-13-2008, 09:47 PM   #10
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damn, not to make you feel bad but u posted this the day i installed mine... that seems like forever ago :(

gl man
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Old 11-14-2008, 07:56 PM   #11
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UPDATE:

just came in today WOOOOOHOOOOOOO
will be installed by tonight
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Old 11-15-2008, 01:44 AM   #12
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Let me know how you like it. And if the first and second gear are more useful.
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Old 11-15-2008, 09:34 PM   #13
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Ok, so no more pushing it into a corner and hearing the inside wheel get crazy and smoke up
Not to sound like a wimp, but the way the car handles itself in the corners is so different I have to re-learn the way I drive it haha

1st and 2nd are definitely a lot better now: 1st you actually have a few moments before you have to shift while 2nd is the most noticeable....while going from 4.30 to 4.10 is not a huge leap, It is definitely noticeable for the better......

going up to hwy 49 tonight with a few buddies in their 240's to really put this puppy to use
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Old 11-15-2008, 10:16 PM   #14
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am i the only one who had problems getting the PPF off?
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Old 11-15-2008, 10:41 PM   #15
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what is ppf?

the swap was not nearly as hard as I expected it to be. when we originally jacked it up last night and took a look, we were like "thats a 6 hour job right there"...took me and my dad about 4 hours to do everything, including change the rear brake pads and clean the torsen before installing it.
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Old 11-15-2008, 10:46 PM   #16
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powerplant frame
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Old 11-15-2008, 10:50 PM   #17
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Quote:
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ppf?
Power Plant Frame

The thing that join the transmission and the differential.
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Old 11-16-2008, 02:20 AM   #18
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we never took it off....diff came out absolutely easy without removing the ppf. we never took the axles completely off either, just disconected the spindles from the top a-arms and pushed them out of the diff....

btw

THE CAR HANDLES AMAZING....very big improvement over the open diff, thats for sure.
i am happy
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Old 11-16-2008, 12:10 PM   #19
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so you didnt completely drop the diff? im confused
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Old 11-16-2008, 12:27 PM   #20
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Quote:
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so you didnt completely drop the diff? im confused
Yeah he did
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