rwdfreak

iTrader: (1)

I just been thru 5 hours of streching the rubber between the driveshaft and the diff to mate a TT automatic MKIV Supra on my GS300. Turns ouut everything else fit like a glove except that the flange on that diff is slighty bigger. Well the only other option would have been to swap the flange, but I didn't want to change the crush sleeve.

For those who did the swap is there a rubber available that fit both without steching the crap out of it (Supra, LS400, Soarer)?? I have a small vibration over 70mph and I'd like to be able to remove and instal this rubber easely to clock it for final tune or further work done on the car.

I did my research before and found nothing about that topic. I hate being a guinea pig, but at least now I know and now you guys too. I'll work to find a bolt on solution.

Can't wait to try tis thing in the snow. I won't have to rely on the crapy TRAC system anymore.

FinLIFE

iTrader: (8)

Did you use an auto or 6spd diff? Auto is a direct bolt in whereas the 6spd requires you to swap flanges

sakataj

iTrader: (182)

he asks about the differential but then mentions the tranny so i dunno what he put on

what research and about what? because they talk about which tranny's will fit ALL the time on here AND the supra's diff is a direct bolt on. i had one

rwdfreak

iTrader: (1)

Sorry for the confusion. I was a bit pissed and tired when I wrote the post.

I instaled the differentlial from an automatic TT MKIV Supra. Everything lined up perfectly except the flange. I just did a quick look on ******* and found out that the TT JZA80 with Auto trans has the same coupling flage (aka rubber between the shaft and the diff) as the UZS160, but the JZS160 has a different p/n.

If you take a carefull look back and forth between the UZS160 (JZS147 and MKIV Supra) and the JZS160 here are the main important part and their respective P/N

JZS160
Coupling: 37511-24010
Flange sub assembly: 41204-24020
Transmission Yoke (output): 34780-30070

UZS160
Coupling: 37511-30020
Flange sub assy: 41204-30040
Transmission Yoke: 34780-30060

From my understanding, the driveshaft between the tranny and the diff is bigger on a UZS160 than on a JZS160. The UZS160 share the same couplers, as the rest of the bunch SC, TT Aristo and TT auto Supra and the JZS160 is on it's own.

You guys are right it's bolt on... for a GS400, but not for a GS300. To properly fit a Torsen diff. from a TT auto Supra, you'd have to swap the Yoke which is a painfull and somewhat expensive task to do properly (by replacing the crush sleeve and adjusting the preload).

GammaLex

I did the Auto TT supra LSD on my sc430 direct swap. Are you sure you have the right rearend?

sakataj

iTrader: (182)

im pretty certain its a direct bolt on EVEN for the GS300....several members have this, see below for my next thought

i second this....are you sure you have the right rearend? it was a direct bolt on/off for my gs430 also

samarooai1

anyone with a gs300 with a tt diff have any info to confirm? i have one to try this weekend on my gs300 will let u know how it goes

rwdfreak

iTrader: (1)

I bought it from a friend (Zazzn moderator on Supraforum and member here) that pulled it off from his 1991 Aristo (it was not stock). The diff, was drop on on his car. It was originaly sold to him by an other close friend (Phil Bridge from Adrenaline). It's writen on the diff, TT Auto. It's not big enough to be from a TT manual and It's a 3.73 ratio so it's not a N/A diff.

Like I said the p/n number for the rubber/coupling flanges are different from the GS400 and all the rest of the UZZ/JZZ, UZS/JZS Turbo and JZA80.

Why Toy o diy was censored?

Anybody with a JZS160 that has done it??

Bippu147

iTrader: (9)

GS300 has a different differential. Auto TT supra will fit GS400 and 430, but not 300, 300 has the same input shaft flange as the N/A Supra

rwdfreak

iTrader: (1)

Thanks Bippu147

If I had known this before I would have plan to swap the yoke or put the Torsen guts in the GS300 carrier. So far it works for me, but I dont know how long the coupling flange will last. I had a bitt of vibration at first, but it seems to cure itself overtime. This is the first time I drive a car with a Torsen and it sure lock well, but it's not as smooth as the Clutch type (Salisbury) diff I have in my Celica. Dunno if the chatter is normal or not when I make a sharp turn with low trottle input (like pulling from a parking spot).

Thanks for your inputs guys. Would you consider it a good thing to make a sticky thread about the Supra diff. swap and put all the info all at one place??? I could try to make more research and do a good write up.

JeffTsai

iTrader: (1)

I had a DIY for this a few years ago, but my site went down when one of my hard drives in my server took a dump. The diff bolts up physically to the cars mounting points as well as the axles, but the driveshaft mating area is different sized. No need to swap the torsen LSD guts out.

Here is what you do, remove the companion flange(the 3 bolt flange going to the rubber driveshaft isolator) from the old GS300 diff, and swap it with the one on the TT diff. Simply remove the large(I think 32 or 34mm nut holding the 3 bolt flange on the diff) nut, and pull the flange out. Reinstall according to the factory manual specs and check preload on the diff. Replace the crush sleeve if necessary. When you're done, stake the nut and you're good to go. I've done it a few times and did not have to replace the crush sleeve, the torque I applied was enough to reach specified preload. Only once did I ever have to replace it. Just follow the factory manual and you'll be good to go.

Bippu147

iTrader: (9)

^haha yes that is the way to do it. but not everyone knows how to set up preload on a diff properly.

i would recommend getting a mechanic to do that. I've seen guys **** up diffs pretty good from attempting a DIY.

rwdfreak

iTrader: (1)

Thanks jeff for the tip.

I did it with one of my buddy who happens to be a good tunner/mechnics. At one point he suggested that we could swap the companion flange easely but even if our face turned red, blue and then purple, the stupid nut never came loose. So we went back to streching the crap out of the rubber. It works for now, ut I'm not a big fan of getto solutions.

Hardrvin

Pulling up from the dead to help some folks out.

1: Yes, a auto Supra TT diff will NOT mate to the driveshaft. They use different bolt circles on the flanges.

2: I was able to use the back half of an Aristo TT driveshaft with a front half stock driveshaft. Personally I find this easier than swapping companion flanges. When you mix and match the half shafts, make sure you align the front and rear flanges 180 out from each other (triangle flange to the transmission should be 180 out from the triangle going to the differential). There's also a preload nut on the slip joint but I found mine to be fine.

Though I haven't tried it, I would imagine the GS400 back half will mate to a GS300 front half just the same as the Aristo one did.

Rock-a-Lex

iTrader: (4)

Not sure what modek Supra diff that you're usinb but my 3.73 torsen lsd diff is made for a '93-'95(?) auto Supra TT. Mine bolted up just fine. I bought mine new and it was the entire pumpkin. I have a GS400 and its been on there for over 5 years now; good luck!