Dreaded Diff ...

[outchea]

So here is the deal;

 

I currently have 2 wagons

 

1 Ae71 with a t50, and a busted diff center

 

1 Ke 70 wagon with a 4 spd etc

 

I had a look underneath both wagos and was thinking of swapping the good diff from the KE70 in to the AE71,

 

Both diffs to my understanding are borg and warner, (bolt housing facing the rear of the car).

 

Is this possible ? will i have to modify anything to make it happen.....will the diff ratios be the same ....tailshaft ?

 

Cheers

 

A

[altezzaclub]

Both diffs to my understanding are borg and warner, (bolt housing facing the rear of the car).

 

If they look the same they are the same. The banjo diffs are made of stamped steel plates welded together, the Borgies are cast. The borgies have the access plate bolted on the back, as you saw, while the banjos have the complete removeable diff unit that bolts onto the housing from the front.

 

The ratios I would expect to be different, but I don't know. The auto 4K uses a 4.3, the manual 4K uses a 4.1, so with the extra power of the 4A they should have lowered the ratio from whatever the 4K wagon uses..

 

Use the T50 tailshaft, the rear ends will be the same, the fronts different and the lengths might be different.

 

If you repeat whatever you did to bust the AE71 diff, the other will break just as quickly.....

[rian]

If they are both Borgwarner diffs they should swap over with no problems, check the diff code on the firewall and match it up with this:

 

The 'translator' for diff codes is as follows:

 

First digit:

 

A = 138mm

 

B = 145mm

 

C = 6.25"

 

D = 6.62"

 

E = 7.1"

 

F = 7.5"

 

G = 8"

 

H = 9"

 

J = 9.25"

 

K = 9.5"

 

L = 10.5"

 

M = 12.5"

 

N = 13.5"

 

P = 14"

 

Q = 12"

 

R = 162mm

 

S = 6.38"

 

T = 6.7"

 

U = 6"

 

V = 10.6"

 

W = 15.5"

 

X = 142mm

 

Y = 158mm

 

Z = 202mm

 

- no ring gear = FWD

 

Second, third digits:

 

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 = 4.30

 

29 = 4.10

 

30 = 3.727

 

31 = 3.909

 

32 = 6.591 or 4.807

 

33 = 7.503 or 5.583

 

34 = 6.781 or 4.786

 

35 = 7.636 or 5.60

 

36 = 4.778

 

37 = 3.583

 

38 = 3.417

 

39 = 3.154

 

40 = 5.375

 

41 = 3.308

 

42 = 6.500

 

43 = 3.550

 

44 = 3.214

 

45 = 3.533

 

46 = 2.928

 

47 = 3.944

 

48 = 3.356

 

49 = 3.729

 

50 = 3.400

 

51 = 3.736

 

52 = 3.722

 

53 = 3.250

 

54 = 3.941

 

55 = 3.333

 

56 = 2.821

 

57 = 4.058

 

58 = 3.238

 

59 = 3.234

 

60 = 3.519

 

61 = 2.724

 

62 = 2.892

 

63 = 2.655

 

64 = 4.312

 

65 = 3.837

 

66 = 3.071

 

67 = 3.526

 

68 = 3.095

 

69 = 4.176

 

70 = 5.857

 

71 = 2.962

 

72 = 3.949

 

73 = 4.285

 

Fourth digit:

 

2 = 2 pinions, not factory LSD

 

3 = 2 pinions, yes factory LSD

 

4 = 4 pinions, not factory LSD

 

5 = 4 pinions, yes factory LSD

 

Information sourced from: Toymods.org

[tojo2]

Do those diffcodes apply for borg warner as well?

[rian]

These are Toyota's codes, they will be stamped on the compliance plate under "Axle". So I assume they will to apply to whatever factory diff is in the car.

Edited March 17, 2014 by rian

[ra23celica]

My November 1984 auto AE71 has the Borg Warner diff and the silver tag on the base of the rear plate says the ratio is 4.11. Just my 2 cents here.