Hello,

I need to rebuild my rear differential, the pinion gear is worn out.

Do you have idea which gear set from suonama is correct for 1991 WM 2,5td?

https://www.suonama.com.cn/collecti...late-angle-tooth-for-iveco-daily-4x4-4x2

Or if someone has kit for sale in Europe I would be intrrested.

Thanks for any help.

Edit:
Few pics:
https://www.dropbox.com/s/cnnyfcilmtkzwpg/img_20210721_201821.jpg?dl=0
https://www.dropbox.com/s/t9jy5thrf4x3z3e/img_20210721_213803.jpg?dl=0
https://www.dropbox.com/s/qs0y8laf817hitz/img_20210721_213826.jpg?dl=0

For me it looks really bad but I dont have experience on these. Is it safe to drive it little more or should we cancel our holiday trip?

Hi

I think you need IVECO 7168035 which is 7/43 (1:6,14) and this seems not to be listed at suonama

Thank you!

I just edited the First post with few pics. The part number on ring gear is 7167782R43/7

yes but as far as I know, that`s the part number of this crown wheel, but not the number of the set you need, which is pinion & crown wheel and has a spare part number for this set.

Yes, I understand.

Do you know does these suonama kits fit for old wm if I change them both rear and front differentials?
Gear ratio changes of course.

I'm calling tomorrow for Iveco but the prices are usually quite fancy...

you can switch to the version of the civil 40.10W 4x4 (7170858)* which have 9/47 (1:5,11) this fits without problems in the WM Axle housing.

Here I had written about how to change pinion & crown wheel thread

edit: Other transmission ratios will not fit without changes to the axle housing or pinion/crown wheel , but we have not tested this until now.

* 2200,-€ incl. taxes in 2015.

Ok, closest from Suonama is 9/44.
It's confusing as they have the correct part number (7168035) in there.

That post for changing the gears is super, will be very helpful - Thanks!

Hi,

the ones from Suonama won't fit out of the box. But it is possible to make them fit.

Although I would take the set from a 4x2 (part nr. 7175174) which you get in Europe for about 200€.

I did a lot of research on this topic and had long chats with people who did it this way. Unfortunately I don't have the experience myself to adjust pinion and bevel gear.

But it definitly is possible.

Attached is a chart with all the meassuerements of the different versions. In red is where you need a 4mm spacer.



Best

I am not sure if the 4x2 sets are dimensioned as strong as the ones from the 4x4.
Because if you drive the 4x4 with reduction, there is significantly higher torque at the axle drive....

Great information again, thanks..

Chatted yesterday with Suonama and they added another set of gears to their website (7/41) which they verified should be straight fit for old wm and also original installation for chinese 4x4.

Decided to give them a try (might be a mistake). I will let you know after parts arrive.

Well... Got the parts yesterday (15 days air delivery was about 20 days) and one pinion is dropped off the package and the rest are already broken. Some teeth are missing small pieces. Ordered few bearings to test too, all roller cages were bent on the way.

Packing was just cheap carton box without almost any padding inside. Bearings and shims were put in one plastic bag together without any boxes or padding.

Suonama won't send new parts or make a refund, according to them the delivery company need first pay them and after that they can send new parts. And I should make it happen, even I'm not the shipper and the issue is just the Suonama's packing.

So, I won't recommend using this company's services to anyone.

I'm escalating this with PayPal, hopefully get some of my money back.

Next I'm probably going to test 4x2 parts, thank you Grischa for the info.

Hello,

I'm writing update for this if someone else is interested in 4x2 parts.

I have tested them now 8000km. with reduction maybe 30km, opened the cases and all looks good.

Driving noice reduced significantly, no need for ear protection at our cruising speed 80-83km/h (GPS). Of course cabin is also sound proofed, which it was already before changing the gearing. Original speedo shows more than 10km/h less, I don't know how to compensate it, for me it is not important.

Fuel consumption for our 4000kg and 3.1m high setup is ~14l / 100kms (including chinese diesel heater for few hours) and the car drives well small uphills too with 5th gear. The Car has intercooler and the pump is tuned for it. We did the test drive in finnish Lapland and Norway.

Future tells how long these gears will last. We are finally heading to Africa in the end of this year.

Hi,

thanks for the update!

Can you tell us which set you used?
And did you have to make any adjustments or did it just fit out of the box?

Best,
Grischa

Hi!

The gears are CEI 194.392 (9x47).

Pinions needed the 4mm shims, without they sits too deep.
I decided to add the extra shims together with original pinion depth adjustment shims (had them already), not under the first bearing on the pinion axle as in your earlier picture. Bearing preloads needed to adjust as well.
The pinion axles were little shorter than original, I think it would not be problem.
I spent few days installing these.. Put together, measure, take off, add some shims, so on. But it seems pretty straight forward job to do if you have time.

Hope this helps.