Rediculous Clunking in Driveline

slravene · 12-04-2005, 05:54 PM

After I've been running for a while at speeds (60-80mph) I'll be going along with my foot on the gas (Highway) and if i take my foot off the gas completly and quickly, there will be a loud CLUNK from somewhere in the driveline (tranny or tcase i believe). However if i ease off the gas it will not make this noise. 120K on the odo. and this is boggling my mind. For the 4wd guys it sounds kinda like the sound when switching from D to R while in 4wd under trail conditions. Help if you can. Thanks.

*mechanix* · 12-05-2005, 05:17 AM

Sounds to me that you might have a u-joint loose. That would be the most common thing I would assume. Other causes could be excessive ring and pinion slop, pinion bearing,drive shaft slip joint, tcase chain (I am not sure on this one, I have never been in a 1354 case).

Keep us posted.

slravene · 12-05-2005, 09:08 AM

how should i go about checking/diagnosing those issues?

wired_af · 12-05-2005, 09:11 AM

Read this and see if it helps:

Diagnosis of Driveshaft and U-Joint Problems

12-04-2005, 05:54 PM	#1
slravene Wannabe Elite Explorer Charlotte, NC (Home) / Raleigh, NC (School) '95 XLT Join Date: Feb 2005 Posts: 1,657 Vehicle Specs (Original Poster)	Rediculous Clunking in Driveline After I've been running for a while at speeds (60-80mph) I'll be going along with my foot on the gas (Highway) and if i take my foot off the gas completly and quickly, there will be a loud CLUNK from somewhere in the driveline (tranny or tcase i believe). However if i ease off the gas it will not make this noise. 120K on the odo. and this is boggling my mind. For the 4wd guys it sounds kinda like the sound when switching from D to R while in 4wd under trail conditions. Help if you can. Thanks. __________________ 95 XLT 4x4 / 4.5" / 33x12.5 BFG ATs / 15x8 / Locked CRS Buggy / SOLID HP60s / MAXXIS Trepadors -- Lee R.

12-05-2005, 05:17 AM	#2
mechanix Got beer?!?!?! Springport, Michigan 91 xlt & 93 xlt Join Date: Feb 2005 Posts: 799 Vehicle Specs	Sounds to me that you might have a u-joint loose. That would be the most common thing I would assume. Other causes could be excessive ring and pinion slop, pinion bearing,drive shaft slip joint, tcase chain (I am not sure on this one, I have never been in a 1354 case). Keep us posted. __________________ ASE certified mechanic. 91 XLT on 36's. 2005 F150 XLT -Tow rig.

12-05-2005, 09:08 AM	#3
slravene Wannabe Elite Explorer Charlotte, NC (Home) / Raleigh, NC (School) '95 XLT Join Date: Feb 2005 Posts: 1,657 Vehicle Specs (Original Poster)	how should i go about checking/diagnosing those issues? __________________ 95 XLT 4x4 / 4.5" / 33x12.5 BFG ATs / 15x8 / Locked CRS Buggy / SOLID HP60s / MAXXIS Trepadors -- Lee R.

12-05-2005, 09:11 AM	#4
wired_af Wannabe Elite Explorer Wichita, KS '98 Sport Join Date: Mar 2003 Posts: 1,370 Vehicle Specs	Read this and see if it helps: Diagnosis of Driveshaft and U-Joint Problems __________________ Alex \| '98 Explorer Sport 4.0L OHV 4x4 32's with 4" of lift. Eclipse head unit and amps. Seas mids and LPG tweets.