backlash adjustment/clunking diff

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Jun 23, 2004 | 03:24 PM

racerman_27410

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backlash adjustment/clunking diff

anyone ever have to have the "backlash adjustment" done to their differential?

mine is making a clunk when i let off then re apply throttle- service manager says Ford has been setting the diffs looser as of late- possibly for better fuel mileage. says they can take care of it with the backlash adjustment procedure.

i like good gas mileage as much as anyone but how loose does it have ot be?
just wondering how many others have the same issue

Frank

Jun 23, 2004 | 09:27 PM

selracer

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I have a similar problem I purchased 11/15/03 2004 F250 SC Lariat fx4 6.0l auto. The problem is when shifting from 2nd to 3rd I hear what sounds like a clunking noise similar to a backlash or trans issue. When cruising around 40mph, i can duplicate but most servere when on and off the accelerator. Another issue is the whining while in 4 wheel drive. I have had it in 2 times already with NO PROBLEM FOUND. The noise appears to be getting worse. Also I have a shutter during acceleration when pulling my trailer?? Is this something you see also?

Jun 24, 2004 | 12:10 AM

racerman_27410

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no mine pulls smooth towing and shifts smooth ( no clunks between gears ) around town- the only time i get the clunk is like when the driveline is taking up the slack to initially move the vehicle and on/off/on throttle - enough noise to make me go looking for the cause.

i always associate gear whine with a lack of lubrication or improper meshing of the gear teeth.how many miles have you driven in AWD ? could this be a "breaking in" period for the front diff?

i believe i could handle a gear whine better than a clunk :-)

Frank