Quick question about auto hubs

[Mundy]

Do auto hubs disengage when in 4wd when you reverse :?:

 

[Tony]

Hi Mundy
mine don't
Tony :smile:

 

[Bat21]

Hi Munday, as Tony says, no they don't.

They will only disengage while reversing if there is no drive to the front prop from the transfer box.

 

[Jocky]

Hi Munday, as Tony says, no they don't.

They will only disengage while reversing if there is no drive to the front prop from the transfer box.

I wouldn't bet money on it never happening, it has been known to happen :twisted:

As said its not supposed to happen.


:smile:

 

[Guest]

they disengage for a split second whilst the front drive takes up the bite in the hubs on the reverse side of the snap rings,
they are known to foul and not re-engage sometimes, also known to damage the rings hence why they are called snap rings, thus losing 4wd at the front totally and you get stuck etc

 

[Terranosaurus]

they disengage for a split second whilst the front drive takes up the bite in the hubs on the reverse side of the snap rings,
they are known to foul and not re-engage sometimes, also known to damage the rings hence why they are called snap rings, thus losing 4wd at the front totally and you get stuck etc

Sorry sharkie no they don't what BAT21 said above is correct.

You've been away and theres been a lot os discussion over these in the mean time.

The snap rings referred to in the manual are the circlips the brake (presume bad translation should be clutch) rings are the things people break (note the spelling). They get broken by people selecting 4wd whilst stationary and then setting off hard instead of allowing the hubs to engage gently before accelerating hard.

Once engaged the hubs will not come out unless they are driven out by the hub turning faster in reverse than the driveshaft - this can only happen when 2wd is selected.

 

[(RIP) PLANK]

Well, I dont know myself either way but i would have replied the same as Shark1e I assumed they disengaged for a revolutionthen took up the drive in reverse again. well you live and learn!

Hb is right n the snap ring thing, I htink the fakt they are called 'brake' rings, and the fact that they 'break' has lead to a bit of confusion! The snap rings are as Hb says the circlips that hold the whole thing together.

 

[Guest]

they disengage for a split second whilst the front drive takes up the bite in the hubs on the reverse side of the snap rings,
they are known to foul and not re-engage sometimes, also known to damage the rings hence why they are called snap rings, thus losing 4wd at the front totally and you get stuck etc

Sorry sharkie no they don't what BAT21 said above is correct.

You've been away and theres been a lot os discussion over these in the mean time.

The snap rings referred to in the manual are the circlips the brake (presume bad translation should be clutch) rings are the things people break (note the spelling). They get broken by people selecting 4wd whilst stationary and then setting off hard instead of allowing the hubs to engage gently before accelerating hard.

Once engaged the hubs will not come out unless they are driven out by the hub turning faster in reverse than the driveshaft - this can only happen when 2wd is selected.

i may have been away somewhat but i have not forgotten what i'm on about!!!!

you will find ford call them brake a and brake b and nissan call them snap rings, yes ford call the circlip a snap ring so i was not wrong!
also if you have studied the brake a and b (just for simon) you will see that to engage into reverse there is a SPLIT second as i said of no connection etc

 

[(RIP) PLANK]

I can see that despite the title there is no such thing as a quick question about auto hubs, bin them and get some manuals :lol:

 

[Guest]

lol i agree this time

 

[Terranosaurus]

From the Nissan Workshop Manual

 

[Guest]

bad image i guess

 

[(RIP) PLANK]

no its not he is just cross X :lol:

 

[extreme-4x4]

ok as wendy aint about , to call time


here is my question

in 2wd why does my truck slip and slide and not move in reverse , but on the same bit of muddy grass in forward gears it goes great with no slipping at all.

my tyres are not directional

 

[(RIP) PLANK]

I this clears the snap ring brake ring and break ring confusion which I had allways seen, but i am still lost on the engaged and dissengaged in reverse bit.

Having held autos in my hand a d stripped them etc. I would have agreed with Sark1e, the rings seem made to engage and disengage when turned bakwards, I thinkIi have a loose set in the shed I will have to have a look.

I'm not being argumentative for a change i have no axe to grind either way, in my opinion, the hubs are the weak link in an otherwise good car and have spoiled hte image of the T2 / Mav's off rad abilities over the years.

SO BIN EM !

 

[Bat21]

The internals of the hubs have a spring which keeps the engagement teeth separated when they are not under power from the differential.

When you put the transfer case in 4wd and power is transferred out to the hubs there is a mechanism which overpowers this spring and causes the teeth to engage, locking the hub.

When you go from a forward direction to reverse the hubs actually disengage and re-engage very quickly.

Rocking a stuck vehicle back and forth is what usually blows an automatic hub as all the disengaging and re-engaging under power is too much for them to handle.

If you are into serious off roading, junk them and fit manual locking hubs.

I Hope this helps.

 

[willow]

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaall
all I can say on this subject is get manuals :lol: :lol:

 

[zippy656]

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaall
all I can say on this subject is get manuals :lol: :lol:

i thought you would say that

ive autos, and very happy with them -mex-

 

[(RIP) PLANK]

Im with willow, and I hate to say it Bat, tlig of those hub springs I amsure i have abrand new genuine Nissan set some (hub springs not whole hubs, sorry for any confusion!) where if anyone wants them PM me and I will see if i can find them, free to a good home. They are for a 1996 T2 if they haven't been tidied into oblivion by now!

 

[Guest]

The internals of the hubs have a spring which keeps the engagement teeth separated when they are not under power from the differential.

When you put the transfer case in 4wd and power is transferred out to the hubs there is a mechanism which overpowers this spring and causes the teeth to engage, locking the hub.

When you go from a forward direction to reverse the hubs actually disengage and re-engage very quickly.

Rocking a stuck vehicle back and forth is what usually blows an automatic hub as all the disengaging and re-engaging under power is too much for them to handle.

If you are into serious off roading, junk them and fit manual locking hubs.

I Hope this helps.

exactly what i was saying i think about split second disengagement !! thanks bat

now simon yes i agree on the image but they are called snap rings by one or the other ford or nissan, i have purchased a set many times before i fitted manual hubs and the damm box had snap rings printed on it! and strange the suppliers knew what i meant as well when ordering by the name snap ring!

so i would appreciate less sarcastic comments regarding being away too long and ask you who started this club long before you came on the scene ok!!!!!!!!!!!!!!!!!!!!!!!!!!