toyota LSD compared to nissan LSD

[shanegtr]

how come the nissan LSD is better than the toyota one? I know toyota use friction plate clutches. What do the nissans use?

[-Scott-]

Better ones.

Seriously, don't know. I'm fairly sure the Nissans are a ramp-loading type, but not sure about the Toyota.

Scott

[shanegtr]

mmmm, never heard of a ramp loading type of LSD.

[dow50r]

They have cones that get pushed together when torque is fed through, locking them up.
andrew

[prado4x4]

The thing I can't figure out with Toyota, is why they continue to use the LSD's that they do. They do make some bloody good diffs that would be ideal.

My other car is a toyota soarer. It has a torsen type LSD (Torque Sensing). Basically the more torque aplied, the tighter it locks. This is all done mechanically. I would have thought these would be a lot better than thier normal LSD's.

[shanegtr]

They have cones that get pushed together when torque is fed through, locking them up.
andrew

I know that type, got one like it in my torana, they work quite well

[dow50r]

The thing I can't figure out with Toyota, is why they continue to use the LSD's that they do. They do make some bloody good diffs that would be ideal.

My other car is a toyota soarer. It has a torsen type LSD (Torque Sensing). Basically the more torque aplied, the tighter it locks. This is all done mechanically. I would have thought these would be a lot better than thier normal LSD's.

I think Toyota side on the legal...they make a good diff for on the road, no sideways on dirt like Nissan, no slide outs on greasy roads, or black marks on steep driveways that arnt straight.....and they offer lockers optional.... with ABS, they wont allow ABS disconnection in high range (where you can go fast enough to need ABS) so you can only lock the transfer in low range on an 80 series. etc etc etc

[Rainbow Warrior]

Inside the MQ one is just friction plates, with a spring plates, but it seems to be a good LSD anyway.

[T.B]

In the GU rear, you can actually adjust the spring tension to the point of making it a fully locked diff. Very good when the comp rules state you may only have a locker in the front. I also know that the patrol diffs are rated to 7 ton. If toyota diffs are so advanced in technology, why do so many of them break front diffs when reversing up a hill in low range?

[Dozoor]

In the GU rear, you can actually adjust the spring tension to the point of making it a fully locked diff. Very good when the comp rules state you may only have a locker in the front. I also know that the patrol diffs are rated to 7 ton. If toyota diffs are so advanced in technology, why do so many of them break front diffs when reversing up a hill in low range?

Probly because most are a high pinion ,
they don,t have as much contact , as a normal design.

(maybe toys in reverse are more poweful)

[dow50r]

In the GU rear, you can actually adjust the spring tension to the point of making it a fully locked diff. Very good when the comp rules state you may only have a locker in the front. I also know that the patrol diffs are rated to 7 ton. If toyota diffs are so advanced in technology, why do so many of them break front diffs when reversing up a hill in low range?

Probly because most are a high pinion ,
they don,t have as much contact , as a normal design.

(maybe toys in reverse are more poweful)

Toyota stuffed up...they didnt design their 4wd's to go backwards up hills
Andrew

[shanegtr]

Toyota stuffed up...they didnt design their 4wd's to go backwards up hills
Andrew

Thats cause its more logical to go forwards

[Rainbow Warrior]

In the GU rear, you can actually adjust the spring tension to the point of making it a fully locked diff. Very good when the comp rules state you may only have a locker in the front. I also know that the patrol diffs are rated to 7 ton. If toyota diffs are so advanced in technology, why do so many of them break front diffs when reversing up a hill in low range?

Is that 7 ton pull, lift or carry?

[customhilux]

good old hand brake gets mine workin.

[bigpat]

Low- Reverse is way lower geared than Low 1st, so the torque loads would be absolutely huge!

The way that the helix angle is cut on a ring a pinion is that there is a force trying to separate them in operation. The thrust/taper roller bearings set up in the pinion assy are designed for forward movement, as is the angle that te gear is cut. In reverse the loads are totally different, and the bits aren't really designed for that!

Even though Nissan diffs are bigger, which means stronger (and more expensive), I reckon they are stressed in Low-Reverse too..........

[Bitsamissin]

Nissan GQ/GU front diffs are 9.25" high pinion, 80/100 Cruisers are a 8" high pinion it's just the Nissan ones are bigger/stronger and probably better matched to the mass of the truck hence the failure rate of the Toyo front diffs in reverse.
Low range reverse would be pretty close to low range 1st gear in most vehicles (reverse and 1st gear ratio's are usually pretty similar).