Clunk! Clack! What Broke?
Thread Starter
|
Mountain Pass
Joined: Nov 2006
Posts: 163
Likes: 9
From: marrero, la.
Clunk! Clack! What Broke?
yesterday i put truck in 4wd and it drove fine straight. when i turned i heard clunk and it felt like a flat tire and wheel shake to the point of stopping truck or breakage of something. so i put it back in 2wd and drove fine even in turn. then today, 2wd turning in to park, full turn , i heard a clack! i looked under truck frontend, dont see anything broke! what's going on??????????please help!!!!
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
I don't know about that, my dads 2003 Envoy only uses 4x4 about once a year, and its just fine, and so has every other 4x4 vehicle we've owned, including this ranger. Driving on straight dry road with 4x4 on is very bad for the drive train. When your turning, the front drive shaft and wheels want to turn at a different speed then the rear drive shaft and wheels, causing the system to bind up.
Cargo Master
Joined: Feb 2008
Posts: 2,862
Likes: 44
From: Tooele, UT
going along with what Lead Head said it isn't good on the 4 wheel drive to have it active and running it on asphalt. especially if you are doing any turning. it will tear your joints, differential and transfer case up quick, fast and in a hurry!
Trending Topics
Freshman User
Joined: Nov 2007
Posts: 28
Likes: 0
Yeah I agree with mxer0022 and Lead Head, runn'n it in 4x4 on asphalt with no center diff (ie GTR, WRX etc) is going to destroy your transfer case etc faster than you can count to ten..
JT
JT
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
The differential and the chain/gears in the transfer case are not turning while in 2wd, so there is nothing that needs lubricating. The hubs are packed and sealed with grease, so they are lubricated all the time
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
I explained it earlier, the front tires track differently then the back, for instance, when taking a turn, the front wheels will travel a much farther distance then the back tires. The different locks the driveshafts together, so what happens is the transmission is trying to drive the transfer case and rear wheels at one speed, but when your turning, the wheels and front differential are trying to make the transfercase go faster, but its being limited by the engine and the rear wheels. Thats why sometimes you might notice the front wheels bouncing or squealing while in 4wd on the road.
It gets the whole drive train in a huge bind, and puts tremendous stress on the differentials, transfer case, CV joints, and the hubs.
When your on dirt or another slick surface, the wheels can slip a bit, so nothing gets bound up.
Now about AWD, there are two types of AWD, one is where the transfer case is always in a "ready" state to engage 4wd, and when the computer senses slipping, it slams it into 4x4 instantly, then takes it out when traction is regained.
The other kind has a differential between the front and rear drive shafts, allowing the front and rear wheels to travel at different speeds.
It gets the whole drive train in a huge bind, and puts tremendous stress on the differentials, transfer case, CV joints, and the hubs.
When your on dirt or another slick surface, the wheels can slip a bit, so nothing gets bound up.
Now about AWD, there are two types of AWD, one is where the transfer case is always in a "ready" state to engage 4wd, and when the computer senses slipping, it slams it into 4x4 instantly, then takes it out when traction is regained.
The other kind has a differential between the front and rear drive shafts, allowing the front and rear wheels to travel at different speeds.
Junior User
Joined: Oct 2007
Posts: 56
Likes: 0
yesterday i put truck in 4wd and it drove fine straight. when i turned i heard clunk and it felt like a flat tire and wheel shake to the point of stopping truck or breakage of something. so i put it back in 2wd and drove fine even in turn. then today, 2wd turning in to park, full turn , i heard a clack! i looked under truck frontend, dont see anything broke! what's going on??????????please help!!!!You said it also did it in two wheel drive right?
Might noy hert to check rear diff also .
I had somthing simular to that effect on a nother vehical and it turned out
spider gears were just about gone