Can someone please explain the pro & cons of all the types of diffs available.

only looking at a 7.5" not a 9"

So quiafe, gripper etc etc, plated, uprated vc

please dicuss the options and if some are more suited to driving styles and power levels.

Cheers

Ryan

 

Ryan.......

I looked at and tried them all before settling on a Quaife ATB...

The V.C is very good as std(They used a V.C in the 9" as well with no problems)but most of them are sloppy now so a rebuilt uprated one is a must...

The gripper plated diff is very good but is quite noisy in operation and being plated will wear and need regular rebuilds depending on how much/hard you use it...

The ATB i found to be excellent,it drives very hard out of bends etc without wanting to go sideways all the time and is quiet and maintenance free....The only problem with ATB diffs is if your car has a tendency to lift a wheel they will loose drive as they obviously lose grip to the wheel they are biasing the torque against,as my car is very taught it is not a problem for me.....

My car will be ready fairly soon so if you want to have a blast to see what they are like,give me a shout mate....

 

excellent advice there mr diva

 

By my reckoning Ryans will be ready before yours

 

I think even i`m safe there Rich......

Ryans spec will change another 25 times before he starts to put it back together...

 

Only 25

 

ohhh the pain.

engine is finalised so no need to go any further, not that i can go much further with it, unless i change the crank

suspension and brakes are finished.
wheels are finished.
shell is finished.
cooler/rad and engine bay parts all sorted.

its just a case of bolting it together

 

gotta love 'the diva'

 

i have a Quaife ATB.....plus point is they are pretty bullet proof,downside for me is sometimes you can feel it working when you don't necessarily want it to (makes the rear end 'steer' ever so slightly)

obviously any of them are better than standard though!! you can also try mine any time you like

oh and i need another loom sometime soon

 

if your going to use the car on the road alot,, just get your standard diff rebuilt and pumped up

 

Off topic Ryan, but send me another text as i went to ring you and i deleted the text with your number instead of saving it

 

standard diff to take 550 hp?

martin

07919537128

 

mines does

 

what parts did you uprate euan??

and by whom.

and finally...


what cost

 

why mess around with 7.5" diffs then .....fit a 9" fit and forget will be cheaper in the longrun..not to mention a lot less greif

 

because 7.5" can handle it no problems, if there uprated properly.

and 9" is way too much money and also finding the right ratio.

 

i have a Quaife ATB.....in my 2wd cossy and its money well spent

 

fairenough if thats what you want to do then ryan...wasnt trying to be funny but if you buy a 9 incher it will always be worth good money if you ever want to move it on



wonder why ford didnt use a 7.5" in the touring cars then

 

None

by ford

150 exchange

 

do you have any spare 9" dif for sale kev?

 

no sorry the one out of my escort i broke up is fitted to my 3door

 

Euan, besides doing 180+ you must be very gentle on your transmission ? that or your one lucky bloke !

After seeing what a 550bhp saff done to a well specced 7.5" diff twice I'd go with a 9" if money allowed.

Ofcourse like most others on here though I'd probably risk using something a little cheaper and lay off the heavy abuse.

 

i would say i am pretty easy on it...

never use full throttle in first or second(not that it would grip anyway)

i have had two diff now both while the engine was running 400+ ATW.

both noisy but working fine.

have done 10k miles...

with a car better set up than mine (traction wise) i have no doubt that a standard set up wouldnt last long.

saves spending 2k on a box and another 1500 quid on a diff tho

 

take it the three door is getting finished then?

 

its only needing a day or so spent on it doing some minor wiring and plumbing jobs....so yes probably...when i can be bothered

 

will be tax exempt time its back on the road

 

maybe thats the idea?

 

well you know what they say about us fifers

 

anything to save a penny

 

i'm sick to death typing about fooking diffs

drag up an old post of mine

i must have replyed on about 20 different topics by different peeps about bloody diffs

you know what to do ryan

 

actually thats a good idea neil its eta for being back on road is 1/8/2011

 

me too...fit a 9 incher..job done

 

i can get any 9" diff anyspec vc/pated expensive tho

i am saving up for a 9" xtrac plated diff and going to part ex my gripper 7.5 diff




marco

 

how expensive??? i'll swap my ATB and a packet of midget gems for one

 

they are over 3k for 9" xtrac plated diff but thats with any CWP all brand new of course


the vc one is cheaper but the vc can be uprated to 900Nm if needed


marco

 

all the casing are brand new using the original 909 moulds (Ricardo who made them for Ford )that were built for Ford motor company


marco

 

thats a good price for a brand new unit marco

 

kev

the whole diffs are brand new


CWP's /bearings /Vc units /plated units /casings /side bearing cases/

cwp's from 3.62 /3.9 ,4.1,4.4,4.6,4.8,5.1 the whole lot


marco

 

[quote="The Diva"]The gripper plated diff is very good but is quite noisy in operation and being plated will wear and need regular rebuilds depending on how much/hard you use it..[quote]


yes that is depending on how the plates are set and the ramp angles

we normaly have them set progressive so one wheel spins quicker than the other when cornering thats what we call "road use"

they are noisey when they are set for "race" use they grind a bit when cornering

when you have them new and they are set for road use they are noisy at first untill the plates bed in and when it's bed in they are quite and you wouldn't know that you had a modded diff in there

i had my diff redone and it was noisy at first but now it's quite even when it's hot so i'm a happy man


marco

 

ouch 3k lol , but I suppose by the time you have fucked about changing millions of std diffs then its money well spent..... What sort of launching abuse can the 9" diffs take? What rear beam mods have to be done?

I'm still thinking Jag 10.5" diff.......... just a shame about the weight... wonder how much an alloy casing for one would be?