Transfer case problem !

[Abdo]

Hi guys, New to the forum
Need your help
I'm from Saudi Arabia and here sometime people sell their car just because they couldn't get parts for the cars and I'm trying to buy it online
I have Chevy k30 1983
and the problem is that when i use the 4WD Hi or Lo the 4WD seems to disengage and engage in less than a second and it every 10s or less sometimes more and if I'm clamping a sand it get worse like I stopped the truck
so I need your help guys a link would be great

[ryanroo]

I would look at the locking hubs on the front axle.

that is an NP205 transfer case. it would be really weird that it would pop out of gear. if the locking hubs have been installed wrong or are internally damaged you could get an engagement issue.

welcome aboard!

[doubleclucker]

ABDO- Looking at the transfer case I can see you have the syncronized version of the np205 and your problem is probally in your problematic automatic locking hubs I would install manual hubs which are a bolt on swap and very easy to do and come by. They should be for a internal spline , dana 60 front w/30 spline outer axle shaft.77'-91' 30-35 series.
The only difference is you will have to get out and lock them in when you need front axle assistance!

[ryanroo]

Doubleclucker, educate me please. how do you tell it is the synchro version. i can see that it is pre-85 but i dont know how to see that its synchro.

Thanks

[Gobuffalo]

The big aluminum cover is different. The bump in the middle is aluminum. On the other cover you can see the back of the bearing steel cage. If you look close you can see an 83. That's the first year of the synchronized front output.
I could be wrong!!!

[ryanroo]

i see. i have never had one myself and failed to notice the difference. Thanks!

[doubleclucker]

Exactly!

[jjzepplin]

What's the difference?

[Bigdav160]

Shift on the fly

[jjzepplin]

do these ones have the 4wd switch for the light and the slip joint rear? Does that mean you can put it in 4wd while moving?

[jjzepplin]

Dang I did it again... ABDO!
You have arrived!
This is the best site I've ever found and now you are a member.
You will now be amazed by the knowledge within this site
and you have the collective minds of thousands of people to help you.

[Abdo]

First Thank u all
I think you are right !!
it's not the transfer the hubs maybe
today I used my phone to record whats happening

and here is the video
watch it and let me know
in this video it was on 4Hi

My Movie - YouTube

[Abdo]

And If I wanted to change it to manual hubs what do I need to do ?
another Q what happens if id drove on 4HI and the manual hubs are free for long distance ?

[backwoodsK20]

If you drove the truck in 4Hi with the hubs in the "free" position, it would engage the front driveshaft but not send power to the front wheels (you need to lock the hubs AND have it in 4wd for that). It would be just like driving in 2Hi except you might get slightly worse gas mileage.

[Abdo]

Originally Posted by backwoodsK20

If you drove the truck in 4Hi with the hubs in the "free" position, it would engage the front driveshaft but not send power to the front wheels (you need to lock the hubs AND have it in 4wd for that). It would be just like driving in 2Hi except you might get slightly worse gas mileage.

Is there any problem beside the worse mileage ?

and I need your help guys in the video to confirm it's the hubs

one more Q also if I locked the hubs and drove in HI2 is there also any problem ?

[backwoodsK20]

Originally Posted by Abdo

Is there any problem beside the worse mileage ?

and I need your help guys in the video to confirm it's the hubs

one more Q also if I locked the hubs and drove in HI2 is there also any problem ?

I can't help ya on the hub question, but locking the hubs and leaving the transfer case in 2Hi has the same effect as I mentioned above. You will engage the front axle and driveshaft, but since the transfer case is not in 4Hi it won't send any power to the front wheels. Again you might get a little less gas mileage but otherwise it's fine, but I don't recommend doing this on dry pavement because it will cause under steer.

Keep in mind the hubs are just a mechanism to lock the font wheels to the axle shaft.

[ryanroo]

it appears as though the front output is sending power to the axle. somewhere in the axle is a gremlin. first step would be to check the hubs. i cant tell if the front axleshafts are spinning from the video. if they are, i would blame the hubs.

to install manual hubs, just pull the auto hubs out and install the manual ones. removing hubs is pretty basic, but if you are in need of direction, i can try to post some pics if i can find them.

running the hubs locked and case in 2hi is no real concern if all moving parts in the front axle are in good order. the tires will drive the axle and cause everything to spin.

running with the hubs unlocked in 4wd is the same only in reverse. the transfer case will drive the axle, but not the wheels. so either is mechanically OK as long as the moving parts are in working order.

[Abdo]

Thank you guys

Well then I'm going to install the manual hubs

'll this fit my truck ?

Amazon.com: WARN 38826 Premium Manual Hubs:...
do I need this kit ?

Amazon.com: WARN 32721 Spindle Nut Kit: Automotive
do I need spacial tool like this one ?

Amazon.com: OTC 7158 Hub Locknut Socket Wrench:...

[Mr. 250r]

I might've of missed this somewhere but has it actually been proven he has auto hubs? I don't see any pictures and the video doesn't show anything but i dunno maybe i missed it somewhere. Assuming you have autos try this website i use it quite a bit.

https://www.4wdfactory.com/store/cat...e-Flange-Kits/ but if amazon or somewhere has better prices by all means use them lol

If you look under warn premiums the notes for a GM say if your coming from an auto hub you have to change spindle nuts although i can't verify this somewhere here should be able to. On a side note when installing the hubs if you get them don't pack them full of grease, personally i let mine soak in atf and they work great but everyone does it a little different.

[doubleclucker]

WOW ABDO first reply back since feb! please keep us informed as we all can learn from threads like this.

The 38826 hubs are great replacements for whatever you have and is all you need.

I dont recommend driving around in 4HI or 4LO without the manual hubs locked in(engaged), as there is no bearing in the manual hub itself and any differences in rotation from the axleshaft to the hub will cause premature wear since the hubs are usually lubed with lighter oils like MR. 250r suggests not wheel bearing grease.

Driving around with the manual hubs engaged is perfectly fine in 2HI.

FYI- the spindle nut(s) from the rear 14 bolt can be used on the front dana 60; so you can have 1 special socket for both front and rear axles.

[backwoodsK20]

Originally Posted by doubleclucker

WOW ABDO first reply back since feb! please keep us informed as we all can learn from threads like this.

Agreed. I'm just getting into the 4x4's and have been on this part of the forum reading like a fiend lately.

[Abdo]

Originally Posted by Mr. 250r

I might've of missed this somewhere but has it actually been proven he has auto hubs? I don't see any pictures and the video doesn't show anything but i dunno maybe i missed it somewhere. Assuming you have autos try this website i use it quite a bit.

https://www.4wdfactory.com/store/cat...e-Flange-Kits/ but if amazon or somewhere has better prices by all means use them lol

If you look under warn premiums the notes for a GM say if your coming from an auto hub you have to change spindle nuts although i can't verify this somewhere here should be able to. On a side note when installing the hubs if you get them don't pack them full of grease, personally i let mine soak in atf and they work great but everyone does it a little different.

it's auto I'm sure because there is no selector in the hubs
WARN 38826 Premium Manual Hubs are on the way !!
'll update u soon

Originally Posted by doubleclucker

WOW ABDO first reply back since feb! please keep us informed as we all can learn from threads like this.

The 38826 hubs are great replacements for whatever you have and is all you need.

I dont recommend driving around in 4HI or 4LO without the manual hubs locked in(engaged), as there is no bearing in the manual hub itself and any differences in rotation from the axleshaft to the hub will cause premature wear since the hubs are usually lubed with lighter oils like MR. 250r suggests not wheel bearing grease.

Driving around with the manual hubs engaged is perfectly fine in 2HI.

FYI- the spindle nut(s) from the rear 14 bolt can be used on the front dana 60; so you can have 1 special socket for both front and rear axles.

sure 'll do
Thanks man

[Abdo]

So today I took it apart
This is What I found








this piece of metal in the last pic was missing in the other side !!
maybe this is what caused the problem ?
BTW this piece fell down accidentally and I don't know how to put it back =)
and I should mention that when reversing in 4HI or 4LO the front wheel works fine !!
This is weird

[Abdo]

If someone could change the title to ( automatic hubs problem ) ?

[franken]

Looks like you've found the culprit.
I usually search and see if there's an exploded diagram or useful video. It can take time though.

https://www.google.com/?gws_rd=ssl#q...+problem+-ford
https://www.google.com/search?q=gm+a...Q&ved=0CFsQsAQ