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How can I see that is a 7" or 7.5" differential
Cobra289 - 17/2/09 at 07:52 PM

Hi,
I have done some search but probably the wrong words combination.

I wonder how I can distinguish the differences between a 7" and a 7.5" differentials.

I can see that the top long bolt reinforcing has at the 7.5" a totally cast surface and the 7" has a open, kind of slot.

The next question is:
Con some one tell me if this number [not on the sticky] is a 7" and the ratio?

83BG4025BE

It has the "lobro" flanges form the small picture that I can see on the net.

Next question:
The distance between the the surfaces of the top bolt support is 194 mm?????

Thanks in advance.

Best regards,
Cobra289 [Carlos]

bob tatt - 17/2/09 at 08:04 PM

which diff are you after as i have quite a collection now

Paul TigerB6 - 17/2/09 at 08:07 PM

Its not on the list of 7" Ford diffs i have so guess its a 7.5". Its the width of the mounting lug cast into the differential case anyway.

Cobra289 - 17/2/09 at 08:13 PM

quote:
Originally posted by bob tatt
which diff are you after as i have quite a collection now


I am looking for a 7" diff with flanges for the lobros.
But I am concerned because at my chassis design I have take in account a distance of the 194 mm for the top mounting bolt.

Are the Scorpio's MK1 also 7"??
Regards,
Cobra289

Benzine - 17/2/09 at 08:38 PM



This measurement here isn't it?

Cobra289 - 17/2/09 at 08:45 PM

quote:
Originally posted by Benzine


This measurement here isn't it?


Yes! that is the one.

Is that 194 mm??

This diff looks pretty nice too.

Regards,
Cobra289

Cobra289 - 17/2/09 at 08:55 PM

Hi,
This what I have put in my design.
Is 308 mm correct for a 7" diff [distance between the flanges?





My son build can be seen here that has lots of pictures. [Sorry it is in Spanish]

LINK

Regards,
Cobra289

[Edited on 17/2/09 by Cobra289]

mookaloid - 17/2/09 at 09:34 PM

side by side

diffs
diffs

Cobra289 - 17/2/09 at 09:48 PM

quote:
Originally posted by mookaloid
side by side

So you have two?
Thanks for the info. That point is clear I have take in account the 7.5" in my design.


Back to the Part number.
83BG4025BE
What kind of diff is this one????
Is there a FORD relate site where I can track the numbers??

Regards,
Cobra289

Cobra289 - 17/2/09 at 10:06 PM

I think that I have found some information.

This part number belongs to a
FORD SCORPIO MK1 (GGE) 2.9 i 4X4 BRE 2,9

Now knowing this, kan someone let me know more about the diff for those cars?

- Ratio
- Lobros [108 mm?]
- shafts length [509 mm long] [468 short]
- LSD????

Thanks for all the cooperation.
Regards,
Cobra289

mookaloid - 18/2/09 at 12:34 AM

quote:
Originally posted by Cobra289
quote:
Originally posted by mookaloid
side by side

So you have two?
Regards,
Cobra289


No I don't have 2 but the picture shows the differences which you describe in your first post.

If you take the back off the diff, the ratio is usually marked on the crownwheel.

Liam - 18/2/09 at 12:28 PM

Lots of chassis are designed to take a 7.5" or 7" diff. You just need to use some washers to take up the gap if you fit a 7".

Not sure if your info is correct - no 4x4 has a 7.5" diff.

Liam

Cobra289 - 18/2/09 at 09:52 PM

quote:
Originally posted by Liam
Lots of chassis are designed to take a 7.5" or 7" diff. You just need to use some washers to take up the gap if you fit a 7".

Not sure if your info is correct - no 4x4 has a 7.5" diff.

Liam


Thanks Liam,
I take a note! put in the DOC information file.
I think that the guy is selling, has just take the casting number.
He will not respond my questions!

Any information of the length of the Sierra halve shafts?
Regards,
Cobra289

[Edited on 18/2/09 by Cobra289]

Cobra289 - 24/2/09 at 03:03 PM

Hi,

I may borrow for the chassis build-up a diff with the next information number:
85BB AA 362 4A 1A29 0693

362 = ratio
85BB AA = LSD

If I make a good brake-down of this information it should be a 7" diff with a 3.62 ratio and is a LSD [Viscous] that probably comes from a Cosworth 4x4

Can someone confirm??

Regards,
Cobra289