A big Clunk!
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Senior User
Joined: Jun 1999
Posts: 288
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A big Clunk!
Hi All,
A friend has an '82 Bronco w/302. Sometimes at stoplights he will have this loud clunking sound when accelerating as soon he takes off (easy take off) and it feels like the rearend drops about an inch... He has checked for "slop" in all mounting brackets, etc... But, no luck in figuring out the problem... Any suggestions? He also has the NP203 transfer case...
Thanks,
Rick
A friend has an '82 Bronco w/302. Sometimes at stoplights he will have this loud clunking sound when accelerating as soon he takes off (easy take off) and it feels like the rearend drops about an inch... He has checked for "slop" in all mounting brackets, etc... But, no luck in figuring out the problem... Any suggestions? He also has the NP203 transfer case...
Thanks,
Rick
Freshman User
Joined: Jun 1999
Posts: 29
Likes: 0
A big Clunk!
>Hi All,
>
>A friend has an '82 Bronco
>w/302. Sometimes at stoplights
>he will have this loud
>clunking sound when accelerating as
>soon he takes off (easy
>take off) and it feels
>like the rearend drops about
>an inch... He has
>checked for "slop" in all
>mounting brackets, etc... But,
>no luck in figuring out
>the problem... Any suggestions?
> He also has the
>NP203 transfer case...
>
>Thanks,
>Rick
Rick,
Have you checked the drive shaft. Sounds like the u-joint is bad. Try moving the drive shaft side to side to check for movement.
Tim Sponseller
83 Bronco XLT under construction
351W, 6" Superlift suspension, Rancho 9000S shocks, 33x12.5x15 AT's
ntguru@winfire.com
>
>A friend has an '82 Bronco
>w/302. Sometimes at stoplights
>he will have this loud
>clunking sound when accelerating as
>soon he takes off (easy
>take off) and it feels
>like the rearend drops about
>an inch... He has
>checked for "slop" in all
>mounting brackets, etc... But,
>no luck in figuring out
>the problem... Any suggestions?
> He also has the
>NP203 transfer case...
>
>Thanks,
>Rick
Rick,
Have you checked the drive shaft. Sounds like the u-joint is bad. Try moving the drive shaft side to side to check for movement.
Tim Sponseller
83 Bronco XLT under construction
351W, 6" Superlift suspension, Rancho 9000S shocks, 33x12.5x15 AT's
ntguru@winfire.com
Elder User
Joined: Jun 1999
Posts: 861
Likes: 0
From: SE PA
A big Clunk!
Check the slip joint in the rear shaft, I recall several others here who had this type of noise when starting out. In some cases it turned out that the splines where dry and would "stick" when first appling power. The bang was when they did start to slide. If you don't have a grease fitting on the shaft at this area, you can take the shaft apart and liberally apply grease to them. Might want to check the archives for some more info.
New User
Joined: Nov 2000
Posts: 2
Likes: 0
A big Clunk!
I own a 96 bronco which developed the same exact problem.
You need to grease the slipyoke on your driveshaft. If it has no grease fitting then you will have to take the rear yoke loose from the differential and remove the rubber boot to grease the slipyoke.Essentially you are taking your driveshaft apart at the slipyoke.
You need to grease the slipyoke on your driveshaft. If it has no grease fitting then you will have to take the rear yoke loose from the differential and remove the rubber boot to grease the slipyoke.Essentially you are taking your driveshaft apart at the slipyoke.
Junior User
Joined: Oct 2000
Posts: 65
Likes: 0
A big Clunk!
>I own a 96 bronco which
>developed the same exact problem.
>
>You need to grease the slipyoke
>on your driveshaft. If it
>has no grease fitting then
>you will have to take
>the rear yoke loose from
>the differential and remove the
>rubber boot to grease the
>slipyoke.Essentially you are taking your
>driveshaft apart at the slipyoke.
>
When you re-install the drive shaft, be sure to align the slip joint exactly like it was. They are timed and if your u-joints are not in synch you will most likely have a vibration.
Alan
_____________________________
95 C350-4x4,PSD,4-Door Bronco(Huh?),49K,auto,AIC,switched glow plugs,switched TC lock-up,4.10,Banks PowerPack,straight piped,Mobile-1 gearboxes,Rotella,BFG AT's 295/75/16
>developed the same exact problem.
>
>You need to grease the slipyoke
>on your driveshaft. If it
>has no grease fitting then
>you will have to take
>the rear yoke loose from
>the differential and remove the
>rubber boot to grease the
>slipyoke.Essentially you are taking your
>driveshaft apart at the slipyoke.
>
When you re-install the drive shaft, be sure to align the slip joint exactly like it was. They are timed and if your u-joints are not in synch you will most likely have a vibration.
Alan
_____________________________
95 C350-4x4,PSD,4-Door Bronco(Huh?),49K,auto,AIC,switched glow plugs,switched TC lock-up,4.10,Banks PowerPack,straight piped,Mobile-1 gearboxes,Rotella,BFG AT's 295/75/16
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