Identifying Transfer Boxes

[graham2306]

I have got a transfer box laying on my garage floor that I thought was out of a Discovery.  Mate of mine had a look at it today and said the gear lever linkage is definitely different to his Discovery box and the handbrake mechanism looks identical to my Defender one.  So short of opening it up and counting the teeth on the cogs anyone know how to identify what it is?  Don't want to put it in and find its the same as the one I took out.

Cheers

Graham

[bogie]

This is gona sound crude but it works. Get a input shaft to go in the box which would be where the gear box goes in. You either use a rear shaft of a 5 speed or a front shaft from a series box. Put the transfer box in diff lock,mark the temperary input shaft against the casin and mark the outputs on the casin.Repeat it on both transfer boxes doing a 360 on the input. The output thats turned the least is a higher ratio. ROCKET SCIENCE!!!!!!!!!!!!!!!!!!!!!!

[Disco-andy]

dose it not have the ratio stamped on it?  normally by the cover for the pto out put, i think. disco is 1.44 defender is 1.2

[graham2306]

dose it not have the ratio stamped on it?  normally by the cover for the pto out put, i think. disco is 1.44 defender is 1.2

I'll have a look, thanks

[bogie]

The ratios are on a sticker at the back of the casin. A defender is 1.411 ,200 disco is 1.222 and the late 300 are 1.211 which is the highest one.

[Saffy]

If the box is on the deck you can check manual with it in highbox difflock on. Take the cover off the output gear housing, mark it on the edge with a marker pen, rotate the input shaft one turn and see how many turns the output gear rotates and roughly work out the ratio (or count how many times the input is turned to make the outgear rotate once).
If it's standard you can go by the serial number. Near the bottom of this document it tells you what ratio is paired to the serial.
https://docs.google.com/Doc?docid=dhfmtstj_0ghdpj7jh&hl=en

All stock LT 230"s have a low ratio of 3.321, the following list refers to the high range ratio.
12D = 1.667 LT 230R
13D = 1.410 LT 230R
14D = 1.003 LT 230R
15D = 1.192 LT 230R
20D = 1.667 (2.5 N/A 110)
22D = 1.410 (all 4Cyl 90/110 bar above)
25D = 1.410 (V8 110 LT 85)
26D = 1.003 (RR Classic 3 speed auto)
27D = 1.192 (early RR Classic)
28D = 1.222 (RR and Disco I)
29D = 1.192 (V8 90 LT 85)
32D = 1.222
34D = 1.410 (2.0 Disco I)
36D = 1.211
38D = 1.211
40D = 1.211 (NAS/Japan 90&Disco)
41D = 1.211 (Disco II, diff lock stud)
42D = 1.211 (Disco II, diff lock stud)
43D = 1.410 (90/110 TD5)
57D = 1.410 (90/110 TD5)
61D = 1.211
62D = 1.211
68D = 1.211
69D = 1.211
70D = 1.211 (Disco II, no diff lock)

[graham2306]

Thanks for That Tanglefoot, very useful.

Update, It's a Defender one, glad I didn't fit it!  Came out of a Discovery we bought a couple of years ago for the engine and axles, someone must have fitted a Defender box into it, how strange.

Graham