Outer Limits 4x4 Board

If you run 4.1 in the front and 4.11 in the rear (or visa versa), will it make enough of a difference to stuff the centre diff on the road?

Nope.

I remember a while back, Bill aka daddylonglegs mentioned he ran somehting similar without any issue.

Search newbie.

I once knew of a rangie with a 400 sbc that ran a ford 9" in the rear with 3.89 ratio and stock 3.54 up front - and he had no probs. Something as minor as .01 wont be noticed.

TuffRR wrote:
Search newbie.

I am tossing up wether I change just the rear diff or both in the Rangie as I just bought a pair 80 series diffs with twin lockers. The back one will be going in for sure, but it is more work to do the front as well.

I am sick of the vibs from the diff centre being off set so much, however I will put them in the other Rangie as it is just a toy. And the mounts are already done.

You should have no problems. I had exactly that in my last rangie - 4.6, late model 5 speed box and driven hard
4.1 was in rear and 4.11 in front.

You could alway just sell them to me, that would take care of all your worries ....and mine.

I was told not to even look at 4.1's as they were a lot weaker than the 4.11's. I can unerstand why the are weaker but are they a LOT weaker in that I would break them quickly running 35's?

Do a toy conversion in the front with the 80series in the Rover housing, All you'll need is Jacmac axles, you've got the centre and locker. The only problem is stud pattern. Rear diff may be a bit wider though.

Maggot4x4 wrote:If you run 4.1 in the front and 4.11 in the rear (or visa versa), will it make enough of a difference to stuff the centre diff on the road?

I will soon have these same ratios fitted to my rangie.

105 series rear with 4.11 r & p, front with Nissan GQ 4.1 centre.

I would be surprised if you wouldnt get the same difference from tyre wear/infltion pressures.

walker wrote:You could alway just sell them to me, that would take care of all your worries ....and mine.

I was told not to even look at 4.1's as they were a lot weaker than the 4.11's. I can unerstand why the are weaker but are they a LOT weaker in that I would break them quickly running 35's?

The Toy diffs are better than the Rover ones though. The 4.11 pinions in a rover at tiny, unlike the 4.1 Toy ones that are probably twice the size with the hypoid design.

Even in this pic, the left is a Toy 8" 4.1, yet the right is a Rover 3.54.

Don't want to sound stupid but whats the difference in the teeth ratio on the crown and pinion on a nissan, toy or rover (4.1) are they all 37/9 (4.11)

6.5 rangie wrote:Do a toy conversion in the front with the 80series in the Rover housing, All you'll need is Jacmac axles, you've got the centre and locker. The only problem is stud pattern. Rear diff may be a bit wider though.

Can't do that, don't have any rover housings. They went ages ago.

So I think I will go the Toy completely in the tourer (4bd1) and put the Nissans in the chev powered rangie, rather than mix them up and end up with a weaker front in the truck with more power.

Does anyone think differently?

6.5 rangie wrote:Don't want to sound stupid but whats the difference in the teeth ratio on the crown and pinion on a nissan, toy or rover (4.1) are they all 37/9 (4.11)

My front Nissan GQ centre is 37/9 (4.11:1), but my 105 series rear, with 79 series r&p is 41/10 (4.1:1)

I don't know what 80 series r&p are, but they would not fit 105 series.

Slunnie wrote:

Damn, are they all that wimpy ? What dimensions shall I expect finding under an '84 Stage I ?