Diff pegging

Freelaner · Feb 7, 2013

so pegging a diff prevents the crown wheel from deflecting?

jamesmartin · Feb 7, 2013

yes, especially shock loads

Thor1950 · Feb 7, 2013

Freelaner said:
so pegging a diff prevents the crown wheel from deflecting?

yep and ashcroft axplains have a look. When you hammer down the pinion will try to climb the ring gear causing it to move side ways and either take some teeth out or down and right split it in two then pieces get into the diff them locker at 500-600 each get expensive real quick. at the top of my list to do when the time comes.

Freelaner · Feb 7, 2013

ah, but it will only do this at one point, so this point must be directly adjacent to the least supported area of the crown wheel?

jamesmartin · Feb 7, 2013

opposite pinion

Thor1950 · Feb 7, 2013

where they meet, it is just the nature of the thing over load and stuff moves everyday stuff not necessary

300tdistu · Feb 7, 2013

Thor1950 said:
good question ask ashcroft they can answer better than I can. But they did say locker fail because of driver error. So you must be dooing something wrong then. You don;t like them , then thats your opinion then. But millions are installed every day on the assembly lines and millions in heavy vehicles civilian and military.

its not i don't like them, they have a use. I'm getting my old one repaired and its going in my disco, light off road use and less aggressive tyres

i just think pegging a detroit locker is not going to take the weak point away

would a pegged detroit locker be as strong as a ashcroft or arb pegged diff ?

warrior wants a challenge truck thats not going to fail is the detroit locker up to the challenge

Freelaner · Feb 7, 2013

makes sense as the damage is only done once mesh has been lost, until that event strength is in the gear mesh.

it must take a great amount of power or shock load to create enough force to deflect in this way.

Thor1950 · Feb 7, 2013

300tdistu said:
its not i don't like them, they have a use. I'm getting my old one repaired and its going in my disco, light off road use and less aggressive tyres

i just think pegging a detroit locker is not going to take the weak point away

would a pegged detroit locker be as strong as a ashcroft or arb pegged diff ?

warrior wants a challenge truck thats not going to fail is the detroit locker up to the challenge

Yes IMO
you are pegging the crown wheel from moving, that is the week link not the locker, then the axles.

You look at there HD ring and pinions

Thor1950 · Feb 7, 2013

Freelaner said:
makes sense as the damage is only done once mesh has been lost, until that event strength is in the gear mesh.

it must take a great amount of power or shock load to create enough force to deflect in this way.

eggzactaly you lose the full depth of the gear theeth and move to the edges of the gear which is thinner and weaker

that is why back lash is so important in them

jamesmartin · Feb 7, 2013

big question as there are many different things or reasons for failure ,diff pegging cures one , 4 pin diff another and locker different again, maxi drive locker was the best ive seen in lrs ,

Freelaner · Feb 7, 2013

mmm interesting stuff but i'd never need one

jamesmartin · Feb 7, 2013

Freelaner said:
mmm interesting stuff but i'd never need one

neither have i

Thor1950 · Feb 7, 2013

Freelaner said:
mmm interesting stuff but i'd never need one

Only reason I will is because of putting in a rear locker, what is another 65 Quid at that point.
Don't like the 2 wheel drive 4x4;s, everything In last 20 yrs has a factory locker in them. slippery road and both rears have traction and when 4 wheel lock if steering is straight you got all 4 gripping.

300tdistu · Feb 7, 2013

Thor1950 said:
Yes IMO
you are pegging the crown wheel from moving, that is the week link not the locker, then the axles.

You look at there HD ring and pinions

we will just have to wait and see

its all well and good uprating HD axle diffs and shafts

now i need to uprate my center diff to HD

it never ends

Thor1950 · Feb 7, 2013

jamesmartin said:
big question as there are many different things or reasons for failure ,diff pegging cures one , 4 pin diff another and locker different again, maxi drive locker was the best ive seen in lrs ,

Ok lets add new axles from ashcroft there test was very impressive with shaft flexing before breaking and not the splines to tear out the diff

Thor1950 · Feb 7, 2013

300tdistu said:
we will just have to wait and see

its all well and good uprating HD axle diffs and shafts

now i need to uprate my center diff to HD it never ends

you see there atd they put in the center diff? supposed to help with breakage. Looks very interesting if you are a serious P&P player

Freelaner · Feb 7, 2013

Thor1950 said:
Only reason I will is because of putting in a rear locker, what is another 65 Quid at that point.
Don't like the 2 wheel drive 4x4;s, everything In last 20 yrs has a factory locker in them. slippery road and both rears have traction and when 4 wheel lock if steering is straight you got all 4 gripping.

so it's the locker that induces the extra stress needed to facilitate fitting the peg?

jamesmartin · Feb 7, 2013

Thor1950 said:
Ok lets add new axles from ashcroft there test was very impressive with shaft flexing before breaking and not the splines to tear out the diff

will you stop worshipping ashcrofts ,its universal stuff

Freelaner · Feb 7, 2013

300tdistu said:
we will just have to wait and see

its all well and good uprating HD axle diffs and shafts

now i need to uprate my center diff to HD it never ends

sounds very much like that

the torque gets moved along the drivetrain til it finds a weak point to wreak havoc on

Diff pegging

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