2007 C5500 TopKick rear diff gear howl June 29, 2018, 01:42:06 am Yahoo Message Number: 16745We have a rear end howl starting at about 80km/hr under acceleration and cruising under power which goes away as soon as the throttle is backed off and coasting. Have a S130 rear diff with 4.78 gear ratio. Have replaced all U-Joints and steady bearings on driveline as well as the pinion bearing. Noise is slightly better but still there. Anyone have a similar noise or did have. Or any comments. We are trying to find gears to replace them but even Dana is having issues finding a set of gears. Help!! Quote Selected
Re: 2007 C5500 TopKick rear diff gear howl Reply #1 – June 29, 2018, 06:58:17 am Yahoo Message Number: 16746You did not state what engine you have. Do you have a 6 speedtransmission. If you cannot find 4.78 gear ratio. Consider one of theothers gears like 4.56. I did a search and came up with a couple ofplaces that listed the 4.78 ratio. Over $1200 US.--BestRon Hall Quote Selected
Re: 2007 C5500 TopKick rear diff gear howl Reply #2 – June 30, 2018, 12:44:27 am Yahoo Message Number: 16747Its a DuraMax with a 5 spd. Where did you find the gears and are they Dana/Spicers?ThanksWayne Quote Selected
Re: 2007 C5500 TopKick rear diff gear howl Reply #3 – June 30, 2018, 05:07:42 am Yahoo Message Number: 16748My rear axle was a 4:44 rear axle with a 5 speed. Did very well. Lookslike the only readily read ring and pinions are 4.88 and 4.30. Here isone place I checked.https://www.drivetrainamerica.com/differential/ring-pinions/application/dana-s130/https://www.justdifferentials.com/searchresults.asp?Search=s130&Submit=Here is a place that sells complete axles. Used and New. I do not knowenough to tell what will work and not.https://www.heavytruckparts.net/search.php--BestRon Hall Quote Selected
Re: 2007 C5500 TopKick rear diff gear howl Reply #4 – July 01, 2018, 08:20:07 am Yahoo Message Number: 16751This sounds a lot like the "issue"I chased with my 2007 Kodiak gasser. I chased it for nine yrs with not a lot of change. The truck place who did my mechanical stuff drove it and said it wasn't anything. It bothered me so I kept after them and they drove it several times, one guy told me it's no different than any other Kodiak, but since I didn't have a dump body or box-truck, I could hear it better. He said it was a giant sound box and I shouldn't worry. After three years, they opened the rear end to inspect it. The gears, bearings, and carriers all looked just fine. We changed to one of the oils from Lubrication Engineers (LE-607?) and it was a little better.After almost ten years and 60,000 miles, it still whined.Take care, Greg Quote Selected
Re: 2007 C5500 TopKick rear diff gear howl Reply #5 – July 01, 2018, 08:19:06 pm Yahoo Message Number: 16752We had the whine. Reported it to Jayco and they eventually had MORryde look at it (MORryde did the chassis extension). They changed the U-joints. When we road tested it we said NO WAY. The Jayco tech took a drive with us and agreed. They set up an appointment with McCormick Quote Selected