80 series rear diff centre into bj73

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yes, you can run the 4.11 front with the 4.10 rear with no issues at all.
will it do damage? no
will it cause gear bind? no
Dan is being cautious, nothing wrong with that. He was just pointing it out to the masses.
Being old is cool, you don't have to put up with crap from people cause we just don't care.
carry on.

I'm sorry my opinions on a public forum have offended you. I will strive to do better.


By the way age has nothing to do with it. And I am offended that you would even bring that up.
 
gear bind ...
tangent:
i sold one of the first BJ74s to an old fart in Calgary. I told him NOT to drive in 4WD on hard surfaces. the BJ74s have a push button 4wd AND a dash indicator telling you 4wd is engaged.
he drove it one wintery day and pushed the button. in about june he calls me up complaining about his truck driving like crap, stinking, lurching .. he was a bit of a prick so i told him to bring it over.
turns out he "forgot" to disengage the 4wd and buggered his t/case. seems he remember engaging 4wd back in November and the light was on ever since. i asked him why he saw the light and never disengaged the button? i forgot, he said.
he was after warranty ... :lol:
driving locked doesn't mean you will lose your t/case in a day but it WILL happen.
i drive locked usually from first snow until spring hits. as long as you are on wet, dirty, icy terrain you will be fine. you drive on hard packed dirt, cement, pavement, rock and you will eventually kill the t/case or bust a birf.
nice thing, with out old land cruisers we can engage the front diff AT ANY SPEED as long as the hubs are locked. driving down a road in the winter, pavement is dry and hubs locked but 2WD. you see ice on the road ahead, push the button and carry on.
also, as long as you are going straight or gentle curves you can be locked in 4wd on hard surfaces.
want to tear out your t/case? take some of those long on-ramps locked ... nothing seems to work harder on your truck than those decieving designed t/case eaters.
okay, now you can carry on.
 
oh, and the locked 80 series rear diff will fit into the FF 70/40/60 rear diff with slight mods but you will need long spline short side axle.
(corrected)
 
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Adam, you've gotta be the only Mudder in the history of time to utter these words to CDan, who's a renowned TLC authority, a huge contributor to Mud, and a well respected member of this community, AND you proceeded to do so with the attitude of a complete a******.

Post fail.

Delete.

Go ahead and log off, while you're at it.

Pretty sure you've an ego to stroke, anyway.

I've got a huge amount of time and respect for CDan. If anything, you've undersold the enormous magnitude of his contribution to the landcruiser community. He's tremendously knowledgeable, patient and regularly goes above and beyond to help members of ih8mud.

Thing is, in this particular instance, he was just plain flat-out wrong, I pointed it out, he sought to defend his position by obfuscating about his experience (hence my quip about age) and driveline wind-up generally. Which appears to have worked, because now there is a bunch of people (locked79, cicak) posting who think this thread is about whether or not driveline wind-up exists, which was never in dispute.

So Delancy, what is your technical opinion on this, do you agree with Cdan that you would feel a 0.24% difference in drive ratio or do you agree with Crushers, Douglas S and I that it would be imperceptible?

To Cicak and Locked79, you guys have rather misunderstood what was being discussed here, nobody is saying driveline wind-up doesn't exist, the question is whether a 0.24% change in drive ratio would result in a difference in driving experience which could be felt from the driver's seat.

Driveline wind-up can occur with no difference in gear ratio or tyre size, as a result of the different lengths of the paths taken by the front and rear axles during a turn.

-Adam.
 
I've got a huge amount of time and respect for CDan. If anything, you've undersold the enormous magnitude of his contribution to the landcruiser community. He's tremendously knowledgeable, patient and regularly goes above and beyond to help members of ih8mud.

So Delancy, what is your opinion on this?

My opinion is you're .24% less an a****** for the above. :flipoff2:

Dissecting the statements CDan made, quite frankly, highlights your ego allowing for inference of what was NOT said, evidenced here:


Not a lot but, it could get a bit odd.

I was simply noting that there is a difference. They are, afterall, not "the same". How much it matters is in the mind of the end user.

It is possible. As I said "not a lot but it could get a bit odd".

I have been driving all sorts of 4WD vehicles since 1974 and perfectly matched ones will bind when there is "no difference".

could reasonably

It would depend on the settings on your butt dyno as to how you would experience it from the driver's seat.

There seems to be a lot of ambiguity in the wise old man's statements since there's never a definitive, which is Shaman-eqsue, classic CDan.

My technical opinion? Really?

I'm flattered.

Having no more knowledge on the subject than what I've absorbed in reads, I've always understood that a 1% maximum difference to be acceptable in a part time 4wd vehicle that won't be engaged on hard surfaces.

Have an understanding that in AWD vehicles, there's inherent binding that can occur with the same ratios, so it's been stated a no-go, period.

I know that in some rare, extreme sport 4wd and AWD vehicles they utilize the inherent binding to their advantage by either "pushing" or "pulling" with differential gear changes. Although I don't understand the benefits to either or on what substrate one or the other may be used, I do recall hearing that some operate at a 3-3.5% difference.

That said, I have learned the hard way to not question the Shaman, so if he exclaims "the sky is red." I immediately and introspectively question wether or not I ever had a firm grasp on my perception of color reality.

At any given point in time, I always treat the old man with the utmost respect he deserves and will continue to, until he asks to see my CHOKE KNOB or asks to watch me HAND THROTTLE.

:flipoff2:

I don't care of you're right or wrong, nor do I typically start pissing contests with online opponents, but you crossed the line with someone whom I hold I high regard, who isn't in a position to defend statements he didn't even make.
 
Ok another question about this car I replaced diff in rear on weekend all perfect running now I want to do front and can buy a rear centre with lokka brand locker installed out of a 80 series will this fit the front of my bj73 thanks guys oh rear is 4.11 and front will be 4.10 I'm gathering this won't be a problem
 
yes, it will fit the front. straight bolt in.
locka for the front? careful of the birfs when wheeling.
 
yes, it will fit the front. straight bolt in.
locka for the front? careful of the birfs when wheeling.

One of our local club members has an 80 e-locker rear diff in his FJ40 front axle.
 
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yes, i have installed a number of them as well. the e/locker you can disengage when needed.
the locka (lockrite etc) are auto locks and you can't disengage when desired ... busted birf a strong possibility.

also, to install a e/locker/cable locker in the front of the 40/70 you need a long splined inner axle ... obsolete now.
 
Ok another question about this car I replaced diff in rear on weekend all perfect running now I want to do front and can buy a rear centre with lokka brand locker installed out of a 80 series will this fit the front of my bj73 thanks guys oh rear is 4.11 and front will be 4.10 I'm gathering this won't be a problem

So does your rear got a locker now? Because if it limited slip or open I would switch it and use it up front and locker in the rear. Another down side to an auto locker up front is they can be a little unpredictable on slippery roads
 
yes, i have installed a number of them as well. the e/locker you can disengage when needed.
the locka (lockrite etc) are auto locks and you can't disengage when desired ... busted birf a strong possibility.

also, to install a e/locker/cable locker in the front of the 40/70 you need a long splined inner axle ... obsolete now.

Or maybe a custom shaft?
 
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