The lsd thread
- Thread starter NashMan
- Start date
IJ. said:
Possibly even shrink a sleeve over the area with a small shrinkage allowance as not to imply a too large stress over the area effecting the operation of the gear set. This would keep the carrier in primarily compression or well at least lesser amounts of tension increasing its load capacity.
I still believe it's just all the huge cutouts and undressed sharp edges that cause stress risers and a place for cracks to begin.
A nicely dressed case with a reinforcement ring and cryo treated would improve things 50%.
A nicely dressed case with a reinforcement ring and cryo treated would improve things 50%.
seriously....if you guys want to know why the torsen fails, send a broken one to me - I can spend a Saturday at work and have a look at it. PM me and I'll give you my address to send the diff.
Tell you what, I'll throw some slicks on my car in the spring, take it to the track, and pump 500whp through it. When it snaps, I'll send it right to youadampecush said:
I ran my T1 at 500+ for quite awhile and the only failure it ever suffered was a dead pinion bearing from sustained high speed starvation. (killed a normal LSD this way as well)
My car doesn't get traction or hard launches so this is why it's never broken from shock loads. (see vids on my pics page)
My car doesn't get traction or hard launches so this is why it's never broken from shock loads. (see vids on my pics page)
Would you cryo treat the case, or the ring? I've read somewhere that it's tricky to remove and install the gears, but I imagine it's just pins pressed into the gears. Could you cryo treat it with the gears in place?IJ. said:
hey i got an idea start sending emails to quaife and try to get them to start makeing them
in stead of trying to make chicken shit into chicken soup
in stead of trying to make chicken shit into chicken soup
Now, I've not done an analysis of where the forces actually are, but I do suspect that the terminal design error of a Torsen diff is when there is a torque difference between the wheels, the pairs of helical gears perpendicular to the axles are pushed apart or pulled together. That will, half the time, put the case in tension between the side gears. That's where the failures tend to be that I've seen.
I suggest that it's just not possible to make a Torsen that's as strong as a clutch-type LSD. Sure, you can machine the case out of alloy steel, which will help, but, like IJ said, the shape you end up with is intrinsically weak.
However, the True-Trac has it's side gears parallel to the axles. That change would go a long way to making a stronger differential. If you really want the Torsen action, maybe a True-Trac won't break on you, though it still works by putting parts of the case in tension. Personally, I'm going to stick with a clutch-type. It's still smooth, and can be tweaked easily by messing with how much slip additive you use.
Then again, I could be wrong about this. I'm no expert...
Asterix
I suggest that it's just not possible to make a Torsen that's as strong as a clutch-type LSD. Sure, you can machine the case out of alloy steel, which will help, but, like IJ said, the shape you end up with is intrinsically weak.
However, the True-Trac has it's side gears parallel to the axles. That change would go a long way to making a stronger differential. If you really want the Torsen action, maybe a True-Trac won't break on you, though it still works by putting parts of the case in tension. Personally, I'm going to stick with a clutch-type. It's still smooth, and can be tweaked easily by messing with how much slip additive you use.
Then again, I could be wrong about this. I'm no expert...
Asterix
Asterix: They don't do a TrueTrac to fit our G series Diff housing I believe the one the have listed is for the Live axle rears and the offsets are incorrect so the Ring gear flange is in the wrong place.
I run a TrueTrac in my 9" IRS and it's a totally different design to the T1 and while very agricultural it drives ok
I run a TrueTrac in my 9" IRS and it's a totally different design to the T1 and while very agricultural it drives ok
Has anyone looked at installing a Mk4 pumpkin into a Mk3 subframe? These diffs are reliable to up 600rwhp, aren't they?
Tek: Never looked at that just went 9" right off as they're cheap to build right and have a HUGE selection of gears available.
well this is gay i got diff suppost to be 3.91 ended up to be 4.30
the diff is in good shape as in clutch pacs there like new but it is a 4.30 ):
so what to do run a 4.30 or order new ring gear and side gear from toyota
cause i really don't want to run a 3.73
500 plus hummmmmmmmm will my tires hate me will drift be wores cause odf such a short gear ???????
man this sucks
the diff is in good shape as in clutch pacs there like new but it is a 4.30 ):
so what to do run a 4.30 or order new ring gear and side gear from toyota
cause i really don't want to run a 3.73
500 plus hummmmmmmmm will my tires hate me will drift be wores cause odf such a short gear ???????
man this sucks
tekdeus said:
The MKIV differentials are Torsen aka are not bullet proof.. The OEM MKIII differentials are a very similar design to the MKIV (TRD). Why people choose to upgrade the stock I will never understand. In my experience these are great and take abuse over and over. (not to say that mine "won't" break but so far so good) If you just have an OEM differential rebuilt then you should be good for a long time. (although having some other designs on the market can also be a good idea.)
My .02
Duane
ooooo i have reson the stocker will not last as long as in clutch plates working to there fullest
and if you look at after market vs a stock there miles apart one is cast the other is billt one locks up way better and heall more agrive if you do that to stocker it will ware out faster
plus 1 ways suck ass
there is suck thing as not just going in stright line
and if you look at after market vs a stock there miles apart one is cast the other is billt one locks up way better and heall more agrive if you do that to stocker it will ware out faster
plus 1 ways suck ass
there is suck thing as not just going in stright line
upgradedsupra said: