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Old 09-29-2013, 12:47 PM   #1
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Clunk

Loud clunk when shifting into reverse. Ideas?
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Old 09-29-2013, 12:52 PM   #2
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Bad Universals sometime do that.
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Old 09-29-2013, 04:51 PM   #3
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low on tranny fluid?
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Old 09-29-2013, 07:53 PM   #4
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I checked fluid while not running. How much will it go down when you start up? Also left rear HWH leaking. Will take in to have both checked.
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Old 09-29-2013, 10:12 PM   #5
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Allison has a built - in fluid level chk--once the engine and tranny have reached ops temp, let engine idle and push both up and won shift arrows at same time. Pannel will count down to zero which gives fluid levels time to stabilize--then control panel blinks the fluid level as "o" "k" or "l" for low. Never seen anything but OK on mine so not really sure what it blinks if not OK. If using dip-stick, you also need to check at ops temp with engine running.
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Old 09-30-2013, 11:32 AM   #6
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If level is incorrect, it actually shows a number for the number of quarts low or high.
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Old 09-30-2013, 05:25 PM   #7
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So, is my transmission purple or brownish red? I had some oil on my left rear leveling jack but thought it was hydraulic fluid? It was the color of car ATF. Sheesh!!
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Old 09-30-2013, 06:15 PM   #8
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Both the Allison fluid [ATF or Transyn[synthetic]], and the the fluid in the HWH system are/ can be "brownish red. ATF and Transyn are reddish, the HWH fluid is normally clear but if someone topped off the HWH with ATF [which they can], then the HWH fluid would be reddish too. The hydraulic fluid that powers your engine fan, service brakes, and power steering is/can also be reddish--early models ran ATF in this system while mid to later models ran engine oil. So lots of sources for "reddish" fluid on/near your rear jacks.
PS--check the wardrobe or bed slide[depending on yr model] those hoses can leak too.
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Old 10-06-2013, 12:48 AM   #9
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FWIW - Mine used to do that too, once I replaced the drag link ball joints it went away. Suspect it could be a number of things, have co-pilot/friend listen for the cluck when they are outside and you are in. At each wheel in succession is a good place to start. The front left, then front right, then rear right, and finally rear left. If they don't think it is coming from those areas, then take it into service, they will find it.
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Old 10-06-2013, 01:05 AM   #10
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Quote:
Originally Posted by Old Scout View Post
Both the Allison fluid [ATF or Transynd [synthetic]], and the the fluid in the HWH system are/ can be "brownish red. ATF and Transynd are reddish, the HWH fluid is normally clear but if someone topped off the HWH with ATF [which they can], then the HWH fluid would be reddish too. The hydraulic fluid that powers your engine fan, service brakes, and power steering is/can also be reddish--early models ran ATF in this system while mid to later models ran engine oil. So lots of sources for "reddish" fluid on/near your rear jacks.
PS--check the wardrobe or bed slide [depending on yr model] those hoses can leak too.
Our HWH system came with Dexron III in it so ours is reddish. You can also use TranSynd in it since they can be mixed. TranSynd would be overkill in the HWH but can be used as a replacement if needed.
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Old 10-06-2013, 01:26 AM   #11
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I vote Universal Joint.
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Old 10-07-2013, 03:21 PM   #12
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And the winner is.....universal joint. The red fluid was hydraulic from a leak at a fitting on jack. Thanks to all.
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Old 10-08-2013, 12:13 AM   #13
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Did you tighten the fitting on the jack and did that stop the leak? Glad you found the U-joint before it failed all the way. WRV recommended that they be lubed every 3,000 miles, so I have or do mine prior to leaving in the fall and depending on how far I go, when I get home, or before I start for home if on the east coast. Twice a year regardless, (every 6 months) if you don't do a lot of long distance driving, like more than 3K miles. Hope his helps.
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Old 10-09-2013, 01:46 PM   #14
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Had to reinstall after cutting a small amount off the hose. New u joint installed. All good now.
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