4,7 diffs

[kgelling]

Hello again.

Today arrives my new 4,7 diffs from Lada Sport Gmbh. Here you can see some photos.

When i have it mounted i'll notice you my impressions.

Bye

[hoodoo]

Look forward to your impressions, especially in road use. What size tyres are you planning to use?
Regards,

[niva4x4]

You will have a Niva crawler

And about slip limited differential locker , nobody try ?

[nivaman]

i was thinking about the limited slip centre diff lock and what it would be like?.
hoodoo can 4.3 ratio diffs be used if the niva engine has been changed to a fiat two litre engine and late model fiat gearbox?.
would it be better to stick with the 4.1 ratio diffs?.

[hoodoo]

All Niva diffs can be used in any casing, regardless of engine. I think with the two litre twin cam, I would probably go with 4.1 ratios, if only because they're are more plentiful than the 4.3. The engine copes nicely with that ratio, and 215/15 diamond tyres!
Don't quite understand the limited slip centre diff, it's already a locker! But, a LSD or locker in the rear makes a great difference. You don't really notice it until you suddenly realise you've just driven through something in which you would previously have got stuck.
Regards,

[ahorton]

Any chance of this thread continuing?

Have you mounted them yet kgelling?

I had a look at the Lada sport website and the prices were a bit too much for me.

[hoodoo]

Note that on the newer Nivas, the front diff arrangement is slightly different. The splined ends of the CV joints are a greater diameter and have 23 teeth instead of 21, so they won't fit in earlier hubs or diff side splines. However, crownwheels and pinions will still fit on all carriers, older hubs will fit between the ball joints etc., etc. So mixing and matching would be called for, but it can be done.
Regards,

[ahorton]

How new is 'newer'?

Mine is '88 which is new enough to have a 5th gear.

[hoodoo]

Not too sure. Mine's '03, which isn't affected, so probably from about '04/'05 onwards?
Regards,

[ahorton]

Ooh. Super-new then.

I just bought a 94 model and I considered that to be very new.

[kgelling]

I haven't mounted it yet. I'm waiting for a pair of K&S lockers and when they arrive i'll mount together.

Hodoo are right with 05 and newer Nivas. Halfshafts are bigger in order to improve resistance. In front axle now doesn't brake near to diff case, now brake cv joint. In rear axle now is virtually impossible to brake a halfshaft, you will brake the diff satellites before it.

Best Regards

[Alejoint]

[manos]

[kgelling]

Hello.

Alejoint, yes, i'm still member of Argentina forum, but you are right; I haven't posted for a long time. It have an easy solution.

I don't want to put bigger tyres, now I have 4 195/80R15 Malatesta Kaiman without any problem. I have a friend with 235/75R15 without problems too, perhaps with the 4,7 diffs I will mount 215/80R15 but i'm not sure.

Manos, I don't want to do 4x4 trial competition, I have my car for my free time. No often I have some mods in order to improve the fiability of the car. I have a pair of F127 (AISI/SAE 4340) steel front halfshafts, much more resistant than niva's ones. I have in my mind to do what you say, to make an home-made iron diff case using a rear one for this. If you have some documentation, pictures or schemes it would be a great help for me.

For last, i don't say that the rear halfshaft can't break, I say that normally diff brakes before.

Thanks and Best Regards




A friend using 235/75R15

My little Niva

[manos]

OK, I didn't mean to predict calamities, I've just tried to point out the fact that the front diff is more vulnerable (in my opinion), especially with a locker.

By the way, I've never heard of "F127 (AISI/SAE 4340) steel front half-shafts".

I have only one photo from an iron case that I will gladly send you if you can write down (or send a by p.m. if you prefer) your e-mail address (the photo is too heavy for this site).

I wonder if you could also send any more information (and photos, perhaps?) about the front half-shafts you use.

Regards

[kgelling]

You are right when you say that the front diff case usually brakes with bigger tyres and/or front locker. It's a fact. There are several solutions.

First and most important: Be a good driver and carefully with right pedal, in 17years of life my Niva never has broken anything of transmision.

Second: Reinforce front diff case with aluminium welding, you mas fill the square cells with weld.

Third: Change front diff case for a rear diff modified (I don't know anybody who have done this).

F127 or AISI4340 is a hight strenght limit stell, with a breakage limit greater than 1000N/mm2, wath is more than 40% greater than Niva's original.
Half shaft is identical in form, only material is different. You can find this shafts for LandRover, Suzuki, Toyota... In Lada not, but there are companies here in Spain that do it specially by order.

Best Regards

[krwl]

Wow, is front and rear ring and pinion identical with only exception of the pinion nut diameter?

How does the pinion compare to size with your stock one?

[hoodoo]

Aren't pinion nuts the same as well? As far as I'm aware, inner components are the same.
Regards,

[AshHash]

Hey kgelling,

Sorry to hijack this thread somewhat but just wondering how you friend has attached his sill bars?

If you could PM me some pics I would really appreciate it!

[hoodoo]

We mount them on bars that fit in the jacking points. Would that be the same?
Regards,

[kgelling]

Sorry AshHash but wath's a sillbar? I'm not english and don't know a lot of specific words.

Best Regards

[nitro_warrior]

The sill is the part of a car that runs down the side of the vehicle between the wheels. It's part of the chassis, (normally) structural, and always full of rust.

As for the sill bars, they are the bars down the side of the vehicles, to protect the sills, I suppose you could also call them step bars because you can stand on them.

Those ones look like they will be fitted to the jacking points, which in my opinion is a bad idea on an older vehicle with out further strengthening as they will almost certainly be badly corroded and not very strong anymore.

[pmark23]

How would you otherwise mount them?

[nivaman]

could a section of round bar be welded at sill level between the jack mounts?.

[nitro_warrior]

Not put much thought into it, just being an unhelpful nay-sayer I'm afraid! It's done on the jacking points because its exceptionally easy to do. You could always replace the jacking points, though the sills would probably still be quite weak. I think I would be tempted to make some kind of frame that bolted onto/round chassis rails, beyond that though I'm not sure. Someone on this forum or the lada UK one was doing a good job of doing up a Niva that included some impressive sill bars.

[hoodoo]

Why not? Spread the load, that's the answer. NitroW, I think you mean the replacing of rusted sills by 4"x2" steel tube welded in?
Regards,

[nitro_warrior]

Good point, before putting sillbars on I would replace the sills with box section, I would incorporate mounts for potential sill protection in that...

[nivaman]

Samara limited slip diffs
is there a certain model these came out of or even if they exist?.

[kgelling]

Ok, now I can answer your question.

The Niva with sillbars is mine. There are several types of sillbars. One of them is basically a steel tube that mounts in the jack mounts. There is no necessary to reinforce this points, they are designed to support much more weight than the force sillbar can do (even in a blow), in fact mi friend can raise his Niva with a Hi-lift supporting only in this sillbar.

My sillbars don't have this system. Have three tubes that goes under the car and anchor to the main beam of the chasis, by means of angular beam and three bolts. This is very effective because it not only protect sill, even the bottom of the car.

I don't have photos, but this weekend I can take some and put here nex monday.

Best Regards.

[nitro_warrior]

I for one will look forward to it