Rear Diffs
07-01-2007, 08:26 PM
#1
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Rear Diffs
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
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
07-01-2007, 08:44 PM
#2
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....
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....
07-01-2007, 09:44 PM
#5
Originally Posted by B9KOS
Originally Posted by The Diva
Ryan.......
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....
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....
By my reckoning Ryans will be ready before yours
Ryans spec will change another 25 times before he starts to put it back together...
07-01-2007, 10:06 PM
#6
Originally Posted by The Diva
Originally Posted by B9KOS
Originally Posted by The Diva
Ryan.......
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....
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....
By my reckoning Ryans will be ready before yours
Ryans spec will change another 25 times before he starts to put it back together...
08-01-2007, 11:39 AM
#7
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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
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08-01-2007, 11:53 AM
#9
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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
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
08-01-2007, 09:46 PM
#22
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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.
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.
08-01-2007, 09:50 PM
#23
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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
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
08-01-2007, 09:51 PM
#24
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Originally Posted by Kevin Sharp
Originally Posted by rapidcossie
do you have any spare 9" dif for sale kev?
08-01-2007, 09:53 PM
#25
Originally Posted by rapidcossie
Originally Posted by Kevin Sharp
Originally Posted by rapidcossie
do you have any spare 9" dif for sale kev?
08-01-2007, 10:03 PM
#32
Originally Posted by marco polo
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
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
08-01-2007, 10:10 PM
#34
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Originally Posted by marco polo
i can get any 9" diff anyspec vc/pated expensive tho
marco
marco
08-01-2007, 11:11 PM
#39
[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
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
08-01-2007, 11:15 PM
#40
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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?
, 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?