Reverse "Clunk!!!" Sound - Defender Source
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Old June 8th, 2009, 08:37 PM
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Reverse "Clunk!!!" Sound

I'll preface this by saying this is probably a stupid, newbie-sounding question. I drove a 95 D90 for 7 years and because it was a manual I never had this issue. I now have a 97 D90 (don't ask... long story involving Florida, no-A/C and that combination making the 95 truck "not-practical" to the wife... hey I still own one right?).

Sometimes when I shift into reverse the transmission goes "WHAM!!! - Clunk!!!." It can turn heads in a parking garage. It doesn't do this every time. I've heard of certain gears not being synchronized - is this the case? Is this normal for auto-trannys?
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  #2  
Old June 8th, 2009, 10:21 PM
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Normal on both of mine
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  #3  
Old June 8th, 2009, 10:24 PM
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to quote land rover, that is caused by "an unfavorable stacking of tolerances"

synchro is an issue for manual transmissions. I'm fairly certain this is not something be concerned with. Though it is not a bad idea to make sure it is not some other thing like a bad bushing, motor/trans mount, or u-joint/driveshaft spline


Quote:
Originally Posted by hutch
I'll preface this by saying this is probably a stupid, newbie-sounding question. I drove a 95 D90 for 7 years and because it was a manual I never had this issue. I now have a 97 D90 (don't ask... long story involving Florida, no-A/C and that combination making the 95 truck "not-practical" to the wife... hey I still own one right?).

Sometimes when I shift into reverse the transmission goes "WHAM!!! - Clunk!!!." It can turn heads in a parking garage. It doesn't do this every time. I've heard of certain gears not being synchronized - is this the case? Is this normal for auto-trannys?
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  #4  
Old June 8th, 2009, 10:45 PM
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Mine does it as well.
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  #5  
Old June 9th, 2009, 12:36 AM
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My 90 and both my DIIs do it. It's normal. You'll also hear a clunk if you take your foot off the accelerator, let it coast for a second and then push down on the pedal again.
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  #6  
Old June 9th, 2009, 09:12 AM
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My SW used to do it, but I recently changed the rear A arm ball joint... That seemed to help.
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  #7  
Old June 9th, 2009, 09:35 AM
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Mine do it, too.
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  #8  
Old June 9th, 2009, 09:39 AM
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Thanks for the input everyone...

Quote:
Originally Posted by Ren Ching
Though it is not a bad idea to make sure it is not some other thing like a bad bushing, motor/trans mount, or u-joint/driveshaft spline
I did notice some of the bushings (just in general all around) could use replacement - they've gotten gooey over time. I'll check on these other items as well.

I imagine it's not such a great idea to get under the truck and listen/watch while someone puts it in reverse eh?

-h
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Old June 9th, 2009, 09:48 AM
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I would personally not recommend such a practice. There is a *very* short list of people who I would trust to be in the driver's seat during such an operation. And I would chock the wheels with something real big. But like I said I would never recommend such a procedure. Also you can identify bad bushings visually or through the use of a large prying device...

Quote:
Originally Posted by hutch

I imagine it's not such a great idea to get under the truck and listen/watch while someone puts it in reverse eh?

-h
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  #10  
Old June 9th, 2009, 08:36 PM
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Quote:
Originally Posted by Ren Ching
I would personally not recommend such a practice.
Yeah... although according to my life insurance policy I may be worth more 7 feet under (to my wife only... don't get any ideas) I think I'll refrain from attempting that procedure for the time being!
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