Need help diagnosing 08 Alpha

[Best4x4]

DO NOT get the National Oil Brand front Axle seals as replacements. They'll leak almost instantly. I went thru it and the AC Delco Axle seals are the only way to go IMHO. That CV does look like it's out a bit from the seal. I'd wipe it down in front of the seal (on the cv axle) and try grabbing it and pushing it in. It "could" have been pulled out by the front IFS wheel travel (as some CV's back in the day were actually a tadbit shorter than OEM). Worth a shot anyways before you tear that H3 down to get to the seals.

 

[Ademily87]

Update

Just now getting around to working on it. Had a lot going on lately.

So I removed the front drive shaft, put the key in the ignition and turned it to acc, selected 4 hi lock and started her up.

Won't move at all. Not in hi, lo, locked, unlocked. Just revs up.

Even in neutral the housing on the front of the transfer case where the drive shafts goes is spinning. Can't put it in park while it's running, makes an awful grinding sound. Shifts through all 4wd selections fine though.

Sent from my SM-N920V using Tapatalk

 

[cgalpha08]

So to get it correct, you can't put the h3 in park when the h3 is on (engine running) and the t-case is in 4 hi? or 4 hi lock?

Also could you put it in park before you removed the driveshaft?

 

[cgalpha08]

If there is grinding while you are shifting gears, then im inclined to point to the transmission as an issue. Hopefully someone else chimes in with more knowledge than me.

 

[Ademily87]

So to get it correct, you can't put the h3 in park when the h3 is on (engine running) and the t-case is in 4 hi? or 4 hi lock?

Also could you put it in park before you removed the driveshaft?

Apparently I was going into park too fast. If I go very slowly into park it won't grind.

Sent from my SM-N920V using Tapatalk

 

[Ademily87]

Before I removed the driveshaft it drove like normal. Would engage all 4wd options including the locking rear diff. Now it doesn't do anything no matter what I try.

Sent from my SM-N920V using Tapatalk

 

[cgalpha08]

Apparently I was going into park too fast. If I go very slowly into park it won't grind.

Sent from my SM-N920V using Tapatalk

As long as the vehicle is stopped, you should be able to put the car in park normally like any other car, yea maybe if you try to go lightening speed fast and throw that puppy forwards something weird will happen but you should have to go slow and almost coax it into park.

 

[Ademily87]

As long as the vehicle is stopped, you should be able to put the car in park normally like any other car, yea maybe if you try to go lightening speed fast and throw that puppy forwards something weird will happen but you should have to go slow and almost coax it into park.

Not lightning fast lol just normal. But with the front driveshaft off and the yolk spinning while in gear with no driveshaft to slow it down, it would make sense why it grinds going into park.

Sent from my SM-N920V using Tapatalk

 

[cgalpha08]

Not lightning fast lol just normal. But with the front driveshaft off and the yolk spinning while in gear with no driveshaft to slow it down, it would make sense why it grinds going into park.

Sent from my SM-N920V using Tapatalk

That's weird, i have had my front driveshaft out many times and have driven with it forwards/backwards with no issues. Something isn't right here, maybe something is wrong with your T-Case, are you sure you are trying this in 4 hi.

 

[Ademily87]

That's weird, i have had my front driveshaft out many times and have driven with it forwards/backwards with no issues. Something isn't right here, maybe something is wrong with your T-Case, are you sure you are trying this in 4 hi.

100% positive. Unless the truck isn't allowing itself to go into 4 hi locked, even though the lights on.

Sent from my SM-N920V using Tapatalk

 

[Ademily87]

Maybe I lost my rwd and was driving front wheel drive the whole time...is that even a possibility??

Sent from my SM-N920V using Tapatalk

 

[cgalpha08]

Maybe I lost my rwd and was driving front wheel drive the whole time...is that even a possibility??

Sent from my SM-N920V using Tapatalk

Well now I am definitely leaning towards your T-case being an issue. you can try the same principle by removing the rear driveshaft and leaving the front one in, however you have to be careful not to lose fluid out of the rear of the t-case.

 

[CaseyS]

If you are grinding going to park then the trans output shaft is spinning when you are in reverse and the park pawl is trying to engage a spinning shaft. This points to the xfer case not being shifted into either lock mode. You are in 4hi street and with the front driveshaft removed, the open center diff is just spinning the front yoke. You may need to install the driveshaft, switch to 4hi lock and get it to engage, and then pull the driveshaft again to start your testing.

 

[Ademily87]

If you are grinding going to park then the trans output shaft is spinning when you are in reverse and the park pawl is trying to engage a spinning shaft. This points to the xfer case not being shifted into either lock mode. You are in 4hi street and with the front driveshaft removed, the open center diff is just spinning the front yoke. You may need to install the driveshaft, switch to 4hi lock and get it to engage, and then pull the driveshaft again to start your testing.

Dang lol I'll have to try that. To both of you, thank you!

Might have to wait on this storm to pass before I can put it back in there.

Sent from my SM-N920V using Tapatalk

 

[jphh20]

Most likely the transfer case shift fork melted and the transfer case is not moving from 4 Hi street to 4Hi lock. If that is the case and you pull your front drive shaft the front transfer case output will spin when you select drive and the truck won't move. Additionally, the truck will grind when you try to select park with the front driveline spinning. My rig is doing the very same thing and I purchased a new metal shift fork and chain while I have the case split open for maintenance. Some other folks have posted great threads with photo's as to what the shift forks deforms into overtime and become ineffective.

Joe

 

[Ademily87]

Most likely the transfer case shift fork melted and the transfer case is not moving from 4 Hi street to 4Hi lock. If that is the case and you pull your front drive shaft the front transfer case output will spin when you select drive and the truck won't move. Additionally, the truck will grind when you try to select park with the front driveline spinning. My rig is doing the very same thing and I purchased a new metal shift fork and chain while I have the case split open for maintenance. Some other folks have posted great threads with photo's as to what the shift forks deforms into overtime and become ineffective.

Joe

It appears that you are correct, sir. Put it back on, engaged 4hi lock, took it apart and same outcome.

How hard is it to replace the fork?

Sent from my SM-N920V using Tapatalk

 

[jphh20]

I have not pulled mine yet but I have on other 4wheel drive vehicles. I will be pulling mine in about a month to do this maintenance.

I found this link with some good detail once the case is split.

Plastic shift fork

https://r.tapatalk.com/shareLink?ur...5&share_tid=5365&share_fid=26758&share_type=t


Joe