Why did Toyota use a 8" and not 9.5" F Diff? (1 Viewer)

[Bear80]

Anyone know why that the 80 series got the smaller and weaker 8" front diff and not the same 9.5" as all previous models?

 

[Kalawang]

What previous model would that be ? I have a very old LC80.


Kalawang

 

[Gold Finger]

Do you mean that it could have eaven less ground clearance under the axles

 

[ryanjl]

I would assume it's probably one of the following:

1. Less rotating mass, especially on a full-time 4WD vehicle.

2. The birfs, although larger and stronger than every LC up until this point, are still the weak point. No sense making everything else much stronger than the weakest link.

3. Some soccer-mom type consideration, but given the design of the rest of the vehicle, I'd doubt this one.

 

[robbie]

The reverse cut front diff is stonger in the forward motion then the old 9" in the forward direction. While the old 9" is stonger in reverse(because it was in the proper direction in reverse), then the current 8 inch. It puts the pinion in the proper direction when it is in reverse cut. More clearence then the Nine. These are what I have heard from the Auzzsies. later robbie

 

[cruiserdan]

Toyota is very keen to control what they call NVH (Noise, Vibration, Harshness) as Doug can attest to. The top pinion in the front allows for a much friendlier drive shaft angle and also allows for a rear-mounted tie rod which aparently Toyota thought was preferable in this application. This is in addition to the attributes already mentioned by Robbie.

D-

 

[Radd Cruisers]

Is the rear 9.5?, thought it was 8 7/8?

 

[cruiserdan]

It's metric........