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diff type please help!!
corrado vr6 - 13/11/08 at 08:24 PM

Hi all

i have a bit of a problem with my diff, as im unsure as to wether its an LSD or not!!

I know this has been asked before but i need to make sure if it is or not as its currently advertised for sale as an LSD!!

i have been told that its not an LSD as it has push in driveshafts is this a definitive way of knowing or are there lsd diff with push in driveshafts??




Please can someone help, Thanks
Greg

[Edited on 13/11/08 by corrado vr6]

eznfrank - 13/11/08 at 08:28 PM

Sierra?? Do you know what model it's off and what ratio it is??

But basically if it has push in shafts then I'm 99% sure it's not LSD.

corrado vr6 - 13/11/08 at 08:34 PM

Sorry yes it is a Sierra diff, i dont know what model it came from as it came as a donor pack from MK, i believe its a 3.92.

im currently trying to get a pic up if this helps thanks again

Paul TigerB6 - 13/11/08 at 08:35 PM

LSD's have bolt on driveshafts so looks like you have an open diff.

tomgregory2000 - 13/11/08 at 08:35 PM

easy
turn one of the drive shafts and see if the other one turns the same way, if it does then LSD, if it turns the other way then not

corrado vr6 - 13/11/08 at 09:37 PM

right ok just done a test when i turn one of the driveshafts the other does not turn at all so im assuming its an open diff, is this right?

also if it is an open diff are these worth less than lsd's?

Thanks again

mookaloid - 13/11/08 at 11:06 PM

quote:
Originally posted by tomgregory2000
easy
turn one of the drive shafts and see if the other one turns the same way, if it does then LSD, if it turns the other way then not


Sorry that's just wrong

Liam - 13/11/08 at 11:42 PM

quote:
Originally posted by mookaloid
quote:
Originally posted by tomgregory2000
easy
turn one of the drive shafts and see if the other one turns the same way, if it does then LSD, if it turns the other way then not


Sorry that's just wrong


Not wrong - just over simplified, and unless you know exactly what you're doing with this test, various factors can come into play making the results unreliable or misleading!

Almost certainly not a standard LSD unless somebody has removed the flanges for some reason. Very slim chance it could have an aftermarket LSD fitted - eg Quaife. Easiest way to be 100% certain is pop the rear cover off, take a photo of what's inside and post it here.

Liam

Gergely - 14/11/08 at 09:15 AM

Hi, U2U me your email address and I will send you a file with the tag codes to identify all Sierra diffs.
Gergely

Rob WM - 14/11/08 at 11:09 AM

I think this is what Gergely is talking about:

Ford axle codes
A=3.36 B=3.77 D=3.92 F=3.842 J=4.056 K=3.31 M=3.14 N=4.29 P=3.58 J=3.62 V=3.33 Z=3.59 2=4.27 3=3.62 4=3.82 5=3.26 6=3.12 8=3.56

3,14 CW47-Pin15
3,38 CW44-Pin13
3,62 CW47-Pin13
3,92 CW51-Pin13
3,77 CW49-Pin13 6.5 inch diff

3,38 fitted to 1,6 OHC ECO 5 speed
3,38 fitted to 2,0 OHC HC
3,38 fitted to 2.3 v6 ESTATE
3,14 fitted to 1,6 OHC ECO 4 speed
3,14 fitted to 2.3 v6 SALOON
3.14 fitted to 2.3 Diesel

85GG 4006 DC --- 3.97
85GG 4006 BC --- 3.62
85GG 4006 AC --- 3.38
85GG 4006 FB --- 3.36
87BG 4006 GB --- 3.14

86GG 4006 AAA --- 3.92 LSD
V87BB 4006 BAA --- 3.62 LSD
V87BG 4006 CAA --- 3.38 LSD
85GG 4006 AAA --- 3.36 LSD

Vin plate codes for Diff ratio

Ratio Code
3.14 M
3.36 A
3.38 U
3.62 V
3.64 3
3.92 D

I have a push in type 3.9 which is not a LSD.

[Edited on 14/11/08 by Rob WM]