24 replies to this topic

[Demesio]

Alright i got me a 87 supra LSD from the junker the other day (half off) for 20 bucks.. broke it apart and seems flawless, i'll be putting it in tomorrow, any advice on how?

im considering just swapping internals.. i'll post up pics as i do it

[aphxero]

Reuse cressida shims and just check backlash. Anything from about .004-.008 is usually okay

[CelicaDRIFTER]

Swapping internals is one way to do it. are you keeping the cressida gearing? That diff off an NA or turbo supra? Turbo has 3.73 or 3.9 gears and NA has 4.3.

On mine im using the whole pumpkin, just swapped the rear mount/cover. I also made spacers for the front.

[Demesio]

^it was off the na ... i was thinking of doin the same, but i wanst sure of how to do the front mount

[aphxero]

Oh yeah I forgot switch the ring gear over haha.

[Demesio]

Sweet .. thanks

[Skin]

any one have a list of diff ratios on what can be swapped into x8?

Difference between models etc like 81 83

[Kyle]

yeah, supramania has it listed like a gazillion times 'cause dumbshits don't understand you can look for the shit before asking

[Demesio]

whats the difference with the ring gear?

[CelicaDRIFTER]

i decided to be nice and look this up.

info tag on your firewall or supra firewall or wutever has the code that will say what size diff/ gear ratio it has.

http://www.supramania.com/forums/showthrea...g+pinion+ratios


Axle Codes:
First Digit = Ring Gear Diameter
A=138mm
B=145mm
C=6.25"
D=6.62"
E=7.1"
F=7.5" ('82-'86 A6 chassis)
G=8" ('86.5-'92 A7 chassis)
H=9"
J=9.25"
K=9.5"
L=10.5"
M=12.5"
N=13.5"
P=14"
R=162mm
S=6.38"
T=6.7"
U=6"
V=10.6"
W=15.5"
X=142mm
Y=158mm

Second and third digits = Gear Ratio

01=3.30
02=3.36
03=3.545
04=3.556
05=3.70
06=3.889
07=3.90
08=4.111
09=4.222
10=4.375
11=4.444
12=4.625
13=4.79
14=4.875
15=5.125
16=5.286
17=5.60
18=5.714
19=5.833
20=6.167
21=6.667
22=6.78
23=6.833
24=7.64
25=4.556
26=5.571
27=3.364
28=4.300 (MA70 NA)
29=4.100 (JZA70)
30=3.727 (Late '89+ MA70 Turbo)
31=3.909 ('87-'89 MA70 Turbo)
32=6.591 OR 5.583
33=7.503 OR 5.583
34=6.781 OR 4.786
35=7.636 OR 5.600
36=4.778
37=3.583
38=3.417

Fourth Digit (number of pinion gears / LSD or Open)

2=2 Pinions Open
3=2 Pinions LSD
4=4 Pinions Open
5=4 Pinions LSD

[Demesio]

haha almost done... another thing to add on...

if you're swapping internals... gotta swap the supra axle shafts and diff carriers as well

[Mo]

Did you figure out what ratio you have?

[Demesio]

its the 4.3

[Mo]

Thats cool. Then you'll be able to start off in 4th gear and plow fields with it and shit.

[Demesio]

Sounds fun since i'll be puttin my W58 in two weeks

[Mo]

Dude, W58s don't fit on Cressida's. I got a mint Auto, we'll just do a trade and you can give me 20 bucks.

[Demesio]

haha my auto hasn't seen 1st gear in months .. or second for that matter... my city mpg sucks balls

so here's my car ... let all the diff fluid out

had to take the muffler off

the two diffs.. mine's on the left

took me a while to get it out but there's the lsd and taking the off the ring gear


when it was time to put it back together.. the axle shafts werent going all the way in... i noticed that the x8 ones are barely bigger so i put the supras' in instead and the diff carrier was different as well, again the x8 were bigger


here's where i stopped for the day.. kinda... i left the diff under the car sittin on the floor...

my dumbass dropped it on my finger and well FML

[Mo]

how's your diff bushings?

[Demesio]

^they're shittier than shit

[rayray]

what supra did you pull that diff from? all i did was swap the ring gear and reused all cressida bearings and was good to go.