# signs of a failing diff? **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [April 30, 2007, 2:56pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549 "2007-04-30T14:56:49Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![66impalass](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/66impalass/32/7429_2.png) [@66impalass](https://forums.speedlife.net/u/66impalass)\ **Post date:** [April 30, 2007, 2:56pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/1 "2007-04-30T14:56:49Z")
ok what are the signs of a failing diff, i get this annoying vibration from the rear end during deceleration, slight hum too. also happens during 1/4 throttle cruising vehicle 99 yukon please tell me something its something easy and cheap and not the diff ---
**Author:** ![Bronco32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bronco32/32/7358_2.png) [@Bronco32](https://forums.speedlife.net/u/Bronco32)\ **Post date:** [April 30, 2007, 3:05pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/2 "2007-04-30T15:05:25Z")
sounds like its going to take a dump soon. my buddy had a 99 tahoe and went thru 3 diffs in 4 years. ---
**Author:** ![ImportMuscle](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/importmuscle/32/7615_2.png) [@ImportMuscle](https://forums.speedlife.net/u/ImportMuscle)\ **Post date:** [April 30, 2007, 3:39pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/3 "2007-04-30T15:39:52Z")
check your driveshaft, there should be a bit of play in it, if its hard as a rock and wont budge, than its u joints My truck did the same thing when the u joints were going ---
**Author:** ![66impalass](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/66impalass/32/7429_2.png) [@66impalass](https://forums.speedlife.net/u/66impalass)\ **Post date:** [April 30, 2007, 4:06pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/4 "2007-04-30T16:06:32Z")
[quote=“ImportMuscle,post:3,topic:28549"”] check your driveshaft, there should be a bit of play in it, if its hard as a rock and wont budge, than its u joints My truck did the same thing when the u joints were going [/quote] I think it is the U-joints, I can hear the clunking that happens when they go ---
**Author:** ![Bacon](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bacon/32/7230_2.png) [@Bacon](https://forums.speedlife.net/u/Bacon)\ **Post date:** [April 30, 2007, 4:08pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/5 "2007-04-30T16:08:47Z")
:word: Definatly easy to check causes a lot a vibration, can even occur at certain speeds. This would be a ton more common for it to wear out than a diff. Not a good idea to wait on as I found out in my old ranger either. ---
**Author:** ![JustinH](https://avatars.discourse-cdn.com/v4/letter/j/9fc29f/32.png) [@JustinH](https://forums.speedlife.net/u/JustinH)\ **Post date:** [April 30, 2007, 4:14pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/6 "2007-04-30T16:14:50Z")
Take it to denny’s driveshaft. ---
**Author:** ![Bronco32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bronco32/32/7358_2.png) [@Bronco32](https://forums.speedlife.net/u/Bronco32)\ **Post date:** [April 30, 2007, 4:19pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/7 "2007-04-30T16:19:00Z")
well not that you say clunking.lol. ---
**Author:** ![66impalass](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/66impalass/32/7429_2.png) [@66impalass](https://forums.speedlife.net/u/66impalass)\ **Post date:** [May 1, 2007, 11:06am UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/8 "2007-05-01T11:06:45Z")
I shrapnelled my pumpkin, yay ---
**Author:** ![TrueBlue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/trueblue/32/7245_2.png) [@TrueBlue](https://forums.speedlife.net/u/TrueBlue)\ **Post date:** [May 1, 2007, 11:30am UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/9 "2007-05-01T11:30:01Z")
I guess those are the signs of a failing diff, then… how did it let go? ---
**Author:** ![ly555is](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@ly555is](https://forums.speedlife.net/u/ly555is)\ **Post date:** [May 1, 2007, 11:32am UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/10 "2007-05-01T11:32:17Z")
:word: ? ---
**Author:** ![66impalass](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/66impalass/32/7429_2.png) [@66impalass](https://forums.speedlife.net/u/66impalass)\ **Post date:** [May 1, 2007, 12:49pm UTC](https://forums.speedlife.net/t/signs-of-a-failing-diff/28549/11 "2007-05-01T12:49:47Z")
not really sure, but they said my gears are missing some teeth and the axel was loose and ended up hitting the rear end casing. I wish I would have atleast been doing something cool…