4wd not working. im out of ideas. - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 11-18-2009, 01:34 PM
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4wd not working. im out of ideas.

ok my 4wd on my 01 1500 sport will not work and i need some ideas. when i jack it up with all 4 tires off the ground they all 4 spin. but when im stuck or in mud i get nothing from the front. on a dry road i put it in 4lo and punch it i can do a mean ass burnout and kick the back over but that just shows me the fronts not working. i know the axles engaging and so is the t case wich is new. i get a clunking noise from the front when in 4wd that is consistent with speed. so my good sir's, any ideas as two whats wrong?

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#2 Old 11-18-2009, 02:34 PM
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When all 4 wheels are off the ground, there is no resistance against you're drivetrain, so if something is partially engaging/ trying to engage, it will turn the front wheels. I would chock the front wheels, lift the rear end off the ground and (carefully) put it in gear while someone watches the front driveshaft from a safe distance. I'm betting there's something wrong with the axle disconnect.

Dan

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#3 Old 11-18-2009, 04:08 PM
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i'd check the shift fork on the axle tube

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#4 Old 11-19-2009, 11:16 AM
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Originally Posted by wes springer View Post
i'd check the shift fork on the axle tube
im pretty sure everything's fine with the cad. and one more thing i forgot to add the 4wd light dose come on and off when its supposed to. but ill do what DitchRam suggested and report back.

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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#5 Old 11-19-2009, 11:22 AM
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lil more info i forgot too. it made the weird noises when i didn't have the vacuum actuator on due to waiting for a new one to come in. so there was no way it was even trying to engage. its not the tcase seeing how it did that with two of them. new and old. i engaged the cad manually then took it for a drive with the axle still open guts showing down my driveway and back. still made the noise but was totaly engaged.

PROUD OWNER OF A BLACK DODGE SS/T soon to have a new (rebuilt) 5.9l base 408
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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#6 Old 11-19-2009, 07:35 PM
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Quote:
Originally Posted by DitchRam View Post
When all 4 wheels are off the ground, there is no resistance against you're drivetrain, so if something is partially engaging/ trying to engage, it will turn the front wheels. I would chock the front wheels, lift the rear end off the ground and (carefully) put it in gear while someone watches the front driveshaft from a safe distance. I'm betting there's something wrong with the axle disconnect.

Dan
it didn't even move the truck. made the weird clunking grinding noise and the front shaft was moving. also the axle did engage. it makes the noise in 4wd axle engaged or not but never in 2wd. aka i removed the vacuum actuator and put it in 4 manually.

PROUD OWNER OF A BLACK DODGE SS/T soon to have a new (rebuilt) 5.9l base 408
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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#7 Old 11-19-2009, 08:43 PM
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ok,,,the axle is engaged, and you still do not have 4wd with w load (on the ground). In other words, you have 4wd with no load and no 4wd drive with a load...

...and a clunky grinding noise when it's engaged?

Have you pulled the front diff cover yet?. Or...with the front drive shaft removed, have you tried spinning the front axles while a helper holds one wheel still. This will test the differential. If you get the clunk or grind in the front axle this way you have an internal issue in your diff.

Do you often try 4wd burnouts or engage 4wd on dry pavement?


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#8 Old 11-20-2009, 01:52 AM
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Yeah, I'd be pulling that diff cover. Sounds like the guts in the diff may have let go, or possibly a broken half-shaft..........

2001 Ram 1500 4x4 5.2L 5-speed
Superchips programmer, Ported throttle body, modified intake manifold, HS 1.7 roller rockers, other assorted trinkets....

1987 Ramcharger 4x4 318 auto
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#9 Old 11-20-2009, 11:42 AM
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Originally Posted by dsertdog56 View Post
ok,,,the axle is engaged, and you still do not have 4wd with w load (on the ground). In other words, you have 4wd with no load and no 4wd drive with a load...

...and a clunky grinding noise when it's engaged?

Have you pulled the front diff cover yet?. Or...with the front drive shaft removed, have you tried spinning the front axles while a helper holds one wheel still. This will test the differential. If you get the clunk or grind in the front axle this way you have an internal issue in your diff.

Do you often try 4wd burnouts or engage 4wd on dry pavement?
hello
i have pulled the cover off and whats weird is every thing looks good. is it possible that my ring and pinion are wore out so there slipping a guess you could call it?

and never for both of your questions. the only time ive ever burned any rubber in wed was to see if the 4wd was working which it wasn't. lol

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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#10 Old 11-20-2009, 11:43 AM
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Originally Posted by DitchRam View Post
Yeah, I'd be pulling that diff cover. Sounds like the guts in the diff may have let go, or possibly a broken half-shaft..........
wonder if its possible that some splines sheered off on a hub or half shaft?

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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#11 Old 11-21-2009, 05:47 PM
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Originally Posted by dodge_ss/t View Post
it didn't even move the truck. made the weird clunking grinding noise and the front shaft was moving. also the axle did engage. it makes the noise in 4wd axle engaged or not but never in 2wd. aka i removed the vacuum actuator and put it in 4 manually.
Well based on this post, it sounds like either an axle is broke, or something internaly is wrong. That's why I wanted to confirm that you only had the noise in 4wd.

I'd remove the front drive shaft and try turning the pinion under load (wheels on ground) I'd probably have the cover off so someone can observe.
Then try it with the wheels off the ground.
Id be looking for missing/worn spider gear teeth or teeth on the ring and pinion, as well as a broken shaft. Usually gears that are properly hardened shatter, not erode away.
Although....if you took the front cover off and any of that happened, there should have been metal in your diff fluid. LOTS of metal!


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#12 Old 11-22-2009, 02:23 PM
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Originally Posted by dsertdog56 View Post
Well based on this post, it sounds like either an axle is broke, or something internaly is wrong. That's why I wanted to confirm that you only had the noise in 4wd.

I'd remove the front drive shaft and try turning the pinion under load (wheels on ground) I'd probably have the cover off so someone can observe.
Then try it with the wheels off the ground.
Id be looking for missing/worn spider gear teeth or teeth on the ring and pinion, as well as a broken shaft. Usually gears that are properly hardened shatter, not erode away.
Although....if you took the front cover off and any of that happened, there should have been metal in your diff fluid. LOTS of metal!
yea i didnt see any metal or missing teeth. hmm sounds like a broken axle to me

PROUD OWNER OF A BLACK DODGE SS/T soon to have a new (rebuilt) 5.9l base 408
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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#13 Old 11-22-2009, 02:31 PM
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my bad lol

PROUD OWNER OF A BLACK DODGE SS/T soon to have a new (rebuilt) 5.9l base 408
[Black Truck Club Member #671
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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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#14 Old 11-23-2009, 07:56 PM
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Have you had to replace your U joints lately? I had bad U joints then needed my 4wd and the bad end result was I broke my shaft on the passenger side. The sound was similar to what you are explaining.
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#15 Old 11-24-2009, 11:50 AM
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Have you had to replace your U joints lately? I had bad U joints then needed my 4wd and the bad end result was I broke my shaft on the passenger side. The sound was similar to what you are explaining.
that may be it... i know they need it. i think its a shaft.

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About me
Im 17 and live in Texas. I love trucks and fast cars.
i own a 98 dodge ram ss/t and a 81 corvette stingray that im turning into a pro street car. supercharged 496 BBC.

I am someone who can not leave well enough alone.
If it's not broken, I can STILL FIX IT!
I have many projects going on and I randomly dedicate more time to one or another.
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