SLROC Forum

CAN ANYONE HELP, HOW CAN YOU TELL WHICH TRANSFER BOX IS FITTED TO A 90, THE ENGINE AND GEARBOX ARE FROM A DISCOVERY, BUT IT STILL FEELS AS IF IT COULD COPE WITH ANOTHER GEAR OR TWO ?

There should be a ratio sticker on the transfer casing, usually on the back where the PTO is.

Thanks I will get a look at that tomorrow, Cheers

have a look on ashcrofts site there is a section on identifying boxes, and where the number are and what they mean

look at my post on 27/6/11 if you need to check which ratio you actually have if the label has disappeared

what size of tyres , this effects your overall gearing bigger the better like 235/85 r16. There is a good ratio calculator on ashcroft website if you know the transferbox ratio.


http://www.ashcroft-transmissions.co.uk/calc/ratio_calc.html

trying to work out the tyre sizes to do the caculator thingy, but my tyres are 31x10.50x15 lt how can I convert to new money measurements.

Hi ,

the 31 is the complete tyre diameter in inches,
the 10.5 is the tread width in inches,
the 15 is the wheel diameter in inches.

I think this would be similar to 265/75r15
although i've calculated the tread width instead of tyre width to get the 75%

someone can correct me if i'm just being silly...

Stephen

Hi

265x 75 x15    =   30.6/10.4x15

cheers
Greig

You might be better served by posting the full (serial) casing number for it. I'm sure someone will then be able to identify it.

First three letters on the box.

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)

The lable is off  where will I find the casing number..

it should be stamped into the casing on the rear flat area to the left of the fill plug

  Cheers will look tomorrow and try and work it bout on the calculator..

 ???CLEANED AND CHECKED THE SIDE WITH THE FILL PLUG,THE TOP OBSCURED BY THE EXHAUST AND THE BOTTOM,,THE ONLY MARKINGS ARE ON THE INSPECTION COVER PLATE :: RFC5415   AND AN OVAL WITH JVW INSIDE SO STILL CONFUSED.COM???

Should be here;