looking for a sierra style 7" ZF diff
Discussion
is he someone you know?thanks for the reply, but has intrigued me somewhat (Ok more confused, but it makes me sound brighter lol).Few Qs for you if you dont mind...
by active plate i assume you mean electronically controled plated diff?
i notice a viscous comes pretty high up your list, why so? it seems to me that as they have little adjustment in their action, (save for recharging the fluid cartridge with differing grade fluid) and having the same characteristics both on and off (trailing throttle) and can have a fair amount of static preload/drag/stiction call it what you will, they arent as 'clever' as others tyles.
as for Gripper, yes i am considering both Gripper and Tran-x plated. i do like the idea of what the japanese call 1 way (locking on throttle only) or 1.5 way (partial locking under braking/throttle off)
whats the principle of the BTR hydratrack (used in some TVRs i believe).
what vehicles have you used them in? my application is circa 750kg RWD car for sprints/hillclimbs.
any help/insight much appreciated.
by active plate i assume you mean electronically controled plated diff?
i notice a viscous comes pretty high up your list, why so? it seems to me that as they have little adjustment in their action, (save for recharging the fluid cartridge with differing grade fluid) and having the same characteristics both on and off (trailing throttle) and can have a fair amount of static preload/drag/stiction call it what you will, they arent as 'clever' as others tyles.
as for Gripper, yes i am considering both Gripper and Tran-x plated. i do like the idea of what the japanese call 1 way (locking on throttle only) or 1.5 way (partial locking under braking/throttle off)
whats the principle of the BTR hydratrack (used in some TVRs i believe).
what vehicles have you used them in? my application is circa 750kg RWD car for sprints/hillclimbs.
any help/insight much appreciated.
Edited by CNHSS1 on Wednesday 6th February 15:52
thanks for the reply, helpful.
the 1 way refers to the diffs locking ability not its diff action ability. just means that the ramps only operate when the laod is accelerative, not on over-run or braking when it just operates as an open diff. not to be confused with one way overun hubs on some 4x4s.
cheers CNH
the 1 way refers to the diffs locking ability not its diff action ability. just means that the ramps only operate when the laod is accelerative, not on over-run or braking when it just operates as an open diff. not to be confused with one way overun hubs on some 4x4s.
cheers CNH
yes, i see what you meant now. not a rally car but sprints/hillclimbs, so if i end up on the grass my run is spoilt anyway 
. as for a welded diff, thats too agricutural for me im afraid. time and effort spent on making the car grip is undone (at least to some extent) by the fact that the car has to be drifted around corners. also doesnt seem to work as well on lightweight cars (karts arent a car imho). i had a bit to do with some Legend cars a few years ago(albeit not in a mechanical capacity) and when the grip is good they tramp around the corners and makes them unnecessarily hard work to drive (again imho).
. as for a welded diff, thats too agricutural for me im afraid. time and effort spent on making the car grip is undone (at least to some extent) by the fact that the car has to be drifted around corners. also doesnt seem to work as well on lightweight cars (karts arent a car imho). i had a bit to do with some Legend cars a few years ago(albeit not in a mechanical capacity) and when the grip is good they tramp around the corners and makes them unnecessarily hard work to drive (again imho).i do run a 7" quaife currently, just not convinced its the best for my application. agreed the quaife is a great all rounder, but looking for max performance in the dry with good grip (cars useless in low grip/wet due to high power/low weight and stiff setup). as you say, plenty of choice for diff types (ATB, plated, viscous) in the larger 7.5" which also benefit from better ratios (4.27+) but they are a heavy old beast. as for power not too high 280+bhp at the mo on slicks
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