2003 V8 Sahara Build... (1 Viewer)

[03SaharaV8]

I feel like a Torsen Diff would fight with ATRAC, is there something im missing?

Can you elaborate on where you see them conflicting?

ATRAC only activates on a wheel that is spinning faster by X amount than the other wheel on the same axle and it does not care about the amount of torque going to the wheel.

The Torsen diff does not have an activation threshold value like ATRAC, the torsen is constantly active, it is always trying keep the wheel speeds the same and the more torque involved the more actively it tries to keep wheel speeds the same, if it fails to keep wheel speeds the same that is when ATRAC will activate, at this point the brake slowing the wheel that is spinning will provide the torsen with the reaction force it needs to drive the wheel that is not spinning, in a similar way that an open diff responds to having the spinning wheel braked except the torsen will send more torque to the wheel that is not spinning than an open diff would, to the ATRAC system it will just look like a smaller traction loss event so it wont be active as long.

 

[krice118]

Ok, I guess then will the Torsen Diff activate before ATRAC has a chance to respond?

 

[03SaharaV8]

Ok, I guess then will the Torsen Diff activate before ATRAC has a chance to respond?

yep saving the ATRAC for the wheels in the air stuff if required...

 

[03SaharaV8]

Took it out for a little drive today see how the shocks handle dirt roads.... AWESOME! did not even air down and no problems at all on rutted roads

Crappy phone photos:

 

[03SaharaV8]

Timing Belt Service.... (just in time - note dead water pump)

 

[absalom]

Yea, the torsen has me confused as well. Traction with ATRAC, is a huge area of strength on these trucks. It just seems redundant to add a similar (not more capable) traction aid especially given the type of off-reading you do.

That being said, I love that bumper and I can’t understand why!!

 

[03SaharaV8]

Yea, the torsen has me confused as well. Traction with ATRAC, is a huge area of strength on these trucks. It just seems redundant to add a similar (not more capable) traction aid especially given the type of off-reading you do.

That being said, I love that bumper and I can’t understand why!!

The Torsens will take most of the work off the ATRAC is my hope, looking forward to testing my theory soon!

as for the bar, I too like it, all the aftermarket ones look like an afterthought, this one cost me $90aud and I can lift it on and off myself, might not hold up as well as a Steel bar but I'm happy for it to be disposable if it protects the car.

 

[LostAfrican]

Nice score.

I'd like to see that Cressida too.

Yeah me too!! Blows my mind - 2UZ in a Cressida !?!?

 

[03SaharaV8]

Yeah me too!! Blows my mind - 2UZ in a Cressida !?!?

Nope, it was a supercharged 1UZ.

 

[LostAfrican]

Nope, it was a supercharged 1UZ.

Ok that's what you said. But still!!

Please share a p/n and more details on the steering wheel controls?

 

[03SaharaV8]

Please share a p/n and more details on the steering wheel controls?

There is a thread on it here somewhere...

 

[03SaharaV8]

Soooo... in progress for this weekend...

Rear Airbags have arrived so I need to pull my finger out on the on-board air situation...

I need to mount these...

there is some room up here...

on the chassis rail...

Made some brackets to use existing bolt hole and lock into the slot (rectangle will have some flats cut on it so when it rotates it locks in...

To be Continued....

 

[03SaharaV8]

Was not able to find M14x1.5x40mm countersunk cap screws so had to space the compressor off the bracket a bit to leave room for the bolt heads...

it's cold raining and windy today so only got the right hand side mounted up... still got to plumb and wire it...

 

[03SaharaV8]

Got both compressors mounted up also made some stone shields for the compressors...

Will hopefully get them plumbed and wired next weekend...

 

[03SaharaV8]

Only got the tanks fitted and partly plumbed due to the weather...

 

[03SaharaV8]

Rear Air bags are fitted...



Also added some AVM hubs to the front, will look at fancy hubs and different driveshafts at a later date.

This is just for the ability to run 2WD if I blow up a front diff or find the Torsen in the front causes under-steer when I fit it.

Rear and front Torsen's are built and ready to go in, Hopefully get the rear in this weekend...

 

[03SaharaV8]

Ok so Front and Rear Torsen diffs are in! (more on the Rear at the moment as that has been in about a month now and the front went in last-night!)

On road:

Only noticeable change when the front torsen went in it wants to pull the steering wheel back to centre a little more other than that still drives pleasantly and off the line torque steer has been eliminated, will add to this after I have driven it for more than a day! with only the rear torsen fitted there is no change to how the car drives besides a little less ATRAC in the wet and only front wheels spinning up in traffic light drag races

Off Road:

With only the rear Torsen diff traction is greatly enhanced with much less ATRAC kicking in, did a few muddy tracks and the only thing that required some effort was when slowly nudged up to a small wet tree (~8" round) that had some deep mud before it, the front right to the log was not spinning and both rears and left front was spinning, ATRAC was applying the brake to the left front but not enough to get the Right front up and over the log, ended up reversing back and getting a run-up at it to get over, not really ideal... I think the Front Torsen will fix this, will do some more testing now the front is in and report back!

So far really happy with the performance and ecstatic about the price being significantly less than an Air or E locker, in fact I think the two torsen diffs cost less than a single locker!

 

[03SaharaV8]

Did some Tracks up around Mt Disappointment ( Mount Disappointment ), Torsen diffs are EPIC, very happy with my choice, no noticeable wheel spin just stick it in low range and just cruise over just about anything... Sorry no photos or video this time out... next time....

 

[Formulaonehd]

Tackled front and rear shockers today!

View attachment 1550352

Fronts are 30min's each... easy!

...the rears what a nightmare! ended up putting some access holes in the rear floor, there was no way the Right hand side rear was coming out without damaging myself or something else!

Put the holes in and hard job becomes easy! should of just done it straight away!

Have not hit any dirt roads yet, but Ohhh my!!! soooo much better on road, no more steering wheel death grip required over bridge expansion joints... HIGHLY recommended
View attachment 1550912
View attachment 1550911

Do you have AHC ?

 

[03SaharaV8]

Do you have AHC ?

unfortunately not in hindsight I should of got a 2004 with AHC, would of worked great with the rear air bags, now i'm looking for some kind of front air suspension...