TII rear ends - is there a difference between s4 or s5
 

I want to complete my tII conversion by putting the tII rear end in my 91. I have acccess to a decent s4 tII, just making sure that will work?


thanks

jk

There is no difference that I know of. Only difference is with n/a ends because some are open and some lsd.

There is a difference. S4 has a clutch type diff while the S5 is viscous.

I believe all the t2 rear ends are viscous. The n/a rearends that are lsd are clutch type.

nope s4 clutch paclk.. s5 viscious.. word to yo mama

stop posting if you dont know what youre talking about. Not trying to be mean but some noob, more noob then yourself, will read that and then start posting what he read and more misinformation is gonna be spread.

i've saw that in Icemark's website that 88' GXL and GTU used 4.1 clutch type

http://www.mazdamark.com/about_the_fc.htm

would that fit in the S5 TII pumpkin? because i heard that the S4 TII clutch type is a direct fit.....

is this true? i found this http://www.mazdamark.com/about_the_s5_fc.htm i have a 88 gtu and i keep hearing diffent things can some one please get to the bottom of this?

dunno where iread it but ithink the series 5 motor has a higher compression and an electric oil pump-something like that-eh

Silly people. Viscous is for s5's, ALL TII's have LSD's. Clutch type is for s4's, ALL TII's HAD LSD's.

And I beleive Icemark was talking about the NA's ;)!

Icemark is talking about the N/As but it is only his conjecture as to cost saving items. He tends to overy bash S5s for some reason, ranting cost cuts. I personally prefer S5s in almost every respect.

Though he is right that it is more rare to find a LSD on the S5 n/a, non-GTUs, cars some do have them and they are usually clutch type. Only the TII S5s and GTUs have viscous LSDs. (NO, they are not the same)

Some S4 N/As have LSDs they are the smaller diffs (non-turbo) with clutch type LSDS. The open diff is the same size ring gear and carrier but with open type spiders.

All S4 TIIs have the clutch type LSD. They have the larger TII 8" rear end.

Rare S5 non-turbos have clutch type LSDs (usually S4 leftovers or factory standalone option) Again the smaller N/A rear-end.

All S5 GTUs' HAVE N/A rear ends with viscous LSDs (and 4.3:1 ring and pinion). I have heard that some non GTUs have them but i have not personally seen this, while i have seen clutch type on one S5 car that was factory installed.

All S5 TIIs have 8" (larger) rear ends with viscous LSDs.

FD (S6s) have the same 8" rear end but with a helical gear LSD (torsen).

Yep, that is correct.

The S4 models (GTU, GXL, Turbo) had a clutch type LSD, while the S5 Turbo and GTUs (the only S5 models with a LSD) had a Viscous type LSD.

Now as a reminder the non turbo LSD found on the 86-88 GXL and 88 GTU and 89-90 GTUs (note the small "S") was a 7 inch differential, while the Turbo used a 8 Inch differential making the two not interchangeable).

TII Swap
 

I am currently running a S5 Jspec engine in a 87 base coupe with S4 TII tranny, driveshaft, half-shafts, and differential without any problems.

Thanx

Michael

No, it was well published at the time as well as has been published quite a few times since by multiple writers. I can publish a bibography in you need one.

One of the biggest issues with the low sales of the S5 models was the cost. You must remember that the dollar to yen ratio at the time was particulaly bad, and Mazda admitted doing what ever they could to drop production costs so they could keep the price down, and while the they could never drop the costs down to the 86-87 levels. Remember the S5 Turbo was pushing the $30K mark. $6-8 more than the S4 versions.

And I am not bashing when I say that they dropped the GXL LSD for cost reasons. There would be no other reason for it's missing from the car.

k thanx guys so my cars LSD is Clutch type 4.1. I hear these things wear out easier than in the viscous and torsen LSD ppl say those things last long time why is it so different? Well It kind of sux that I have a clutch type LSD cuz some guy told me i had viscous

Well each type has its advantage and disadvantage.

For example

Clutch type (as found on the 86-88 GXL, 88 GTU and 87-88 Turbo) has a faster engagement, but will wear out and need rebuilding and needs a specific additive in the gear oil.

Viscous type (as found on the 89-90 GTUs (note the small "S"-don't confuse with GTU), and the 89-91 Turbo) Very quiet engagment and operation, never needs rebuilding, but is slow on the engagement.

Torsen Type (as found on the Infini III and IV, FD and later NA) Fast engagement, best power transfer, but is noisy and does not handle high power real well, and when it goes the whole differential assembly needs rebuilding.

Dood you got teh good drift lsd so what you buggin about? lol Some guy prob told you that you had teh vlsd so he could rip you off by buying it off you for cheap.

most drifters say vlsd sucks coz you cant adjust it and also its just a cheapie wannabe lsd like every1 here sez. Mazdatrix sez you can adjust teh clutch lsd for mad drifting by mixing lsd clutch parts.
http://www.mazdatrix.com/g8.htm

i dont think he was tryin to rip me off he seriously thought that the gtu's came with vlsd. sorry to bug youcardzrule but what mix would be good? well i guess i was bugged cuz now i know my lsd needs some rebuildin. hope fully it last till i get my TII in it :)

Not sure if you are getting teh whole thing here dood... so just to splane again... Icemarks faq sez your 91 NA aint got no lsd, teh S4 TII lsd has clutches, and teh S5 TII has vlsd. So your 91 diff aint gonna wear out anytime soon coz it aint got lsd if its stock. Ne1 can read teh chart same as me:
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/specifications-what-did-2nd-generation-rx-7-come-w-options-standard-features-249616/

Why you talkin about gtu's? Your car aint a gtus if its a 91 if teh faq is right. Teh faq sez gtus were only 89-90.

lol I aint smart enough to know what mix is good for lsd. you should ask mazdatrix or somebody smart. could also depend on how you drive. Neway most peeps I talked to say open diff is teh worst, vlsd is better, but theres arguements whats best between clutch lsd or torsen. Most mad quick drifters use Deftforce or Kaaz or Cusco diffs that are clutch type. I aint never heard ne1 say vlsd is best cept for being cheap.
http://www.driftfactory.com/index.ph...a9366173efc36d
http://www.a-t-s-usa.com/ats-products/lsd-drift.shtml

i never said i had a 91 and gtu's were made in 88. i know my car has lsd cuz at the back of the diff. theres a plaque that says Limited Slip Differential I just wasn't sure what kind of lsd. and since u said, <br>so i asked what mixed parts could i use to get the results mazdatrix did. well hope this makes sense:)

sorry I thought you were teh dood who started teh thread. my bad.

i think this qustion has been answered early in the thread but just so i got it right im looking at buying a 1991 t2 lsd i was told this is the same as the clutch type in the 87-88 t2s i need this to be a clutch type being that its going in to a fd/ls1 thanks

r u from da hood?

What are the advantages and disadvantages of the KAAZ LSD?

No dood teh 89-91 is vlsd not clutch

no I shift mad quick yo

It adds a clutch lsd to cars that aint got one and it makes cool clunking noizes and a KAAZ sticker looks cool.