could you translate what the writing on the diff means please and cna you tell if its quaiffe or not please

 

its not a quaife and its not a cosworth crown wheel and pinion as they are a 3.64 and not a 3.9

 

you can get 3.9s james

 

yeah u can get 3.9s i carnt make out if its a 3.92 if so they come in 1.6 ovh / 1.8 ohc / 2.0 ohc efi / going by my list!

 

it says 3.92 james

 

upski

 

the writing says

ok....4119..........3.92...........0/90

 

No idea on the 4110 or the 0/90 the only one that matters too u is the 3.92 as thats the ratio! and it wont make that much difference any way so just use it!

 

cheers ajamesc ,thanks for your input ,the thing is its being offered to me as a quaiffe diff

the 90 thing i have been told is it is locked at 90%

 

well it isent a quaife tell them

 

Its not a quaiffe ATB diff, as if it was it wouldnt have that pin in the middle of it, they have a totally different gear setup to that.

 

PS

Looks like it says ".090" to me, which is probably saying its got 90 thou of clearance, but that is only a guess.

 

thanks ajamesc ,


thanks chip ,much appreciated

so i take it ,it looks just like a standard inch71/2 diff with a 3.92 thats been tightened up,

 

yes it all looks standard to me, although im not a diff expert, try pm'ing steveboyslim for a definitive answer, as he deals in a lot of diffs, both standard and modified ones like quaiffe etc.
Thats who I always go to for diff parts/advice.

 

For a second there James i had thought you blown Diff up in the Moonstone Saph

 

Its just a standard diff and the writing itself only tells you it's a 3.9 ratio. They markings have been put on by whoever reconned the diff by the looks of it.

Jeff

 

cheers chip

no chance matt its parked up for the winter

hi jeff ,thanks for your input ,so its just standard then

 

I'm not sure is it 7,5 or smaller 7" diff - it can be Sapphire 4x4 2.0 DOHC 7" diff, which was fitted to this cars. Was exactly 3,92 stamped on it, not 3,90 or 3,91.
You should measure diff housing - is it 7 or 7,5"...

regards
maciek

 

mark the input and output flanges and tunr the input and measure the rotation so find the ratio

simples

if it's a 2.0 dohc 4x4 rear diff it will be an lsd and 7"