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Old 07-02-2011, 08:41 AM   #1
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Allison 1000 Series 8.1

Was traveling down the road just after fuel/propane fillup. We were at approx. 45 mph and then a VERY loud bang from underneath the MH. A sound that I can.t really explain. I thought I hit something and the wife said it sounded like the emergency brake ????? I have no idea how she came up with that. Anyho the dash lit up with that exclamation mark with a gear symol. I pulled over wal;ked around kicked the tires ,crawled underneath and all looked fine. We proceded with the lights still on to our campsite, top speed attainable was 45 mph, and the eng. was flat with barely enough power to get us to our site. After a 3 days of fun we cranked her up no lights and all was well ???????????????? So anyone want to comment please do and don.t pull no punches. We are hoping to go to the east coast toards the end of july. Currenly I,m going to pull the main xmsn oil filter and cut it open and see if? Rig has 40100 miles HELP Jim
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Old 07-03-2011, 03:09 AM   #2
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Quote:
Originally Posted by fayjim2 View Post
Was traveling down the road just after fuel/propane fillup. We were at approx. 45 mph and then a VERY loud bang from underneath the MH. A sound that I can.t really explain. I thought I hit something and the wife said it sounded like the emergency brake ????? I have no idea how she came up with that. Anyho the dash lit up with that exclamation mark with a gear symol. I pulled over wal;ked around kicked the tires ,crawled underneath and all looked fine. We proceded with the lights still on to our campsite, top speed attainable was 45 mph, and the eng. was flat with barely enough power to get us to our site. After a 3 days of fun we cranked her up no lights and all was well ???????????????? So anyone want to comment please do and don.t pull no punches. We are hoping to go to the east coast toards the end of july. Currenly I,m going to pull the main xmsn oil filter and cut it open and see if? Rig has 40100 miles HELP Jim
please add the particulars of your rv to your signature block of your profile.
the year and model etc. of your rv would be nice to know when trying to trouble shoot your problem.
did you smell anything hot or burning?
what is the fluid level in the engine and transmission?
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Old 07-03-2011, 01:47 PM   #3
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Things that make a very loud bang from a transmission are not good. The fact that you cannot go over 45 mph is also bad because that is either the engine being derated for safety or the transmission is locked in a limp home mode. Either way I hope it is not far to go to a good dealer or it is time to get it towed. If it was me I would get it towed. Make sure they take out the driveshaft before they tow you. Look up towing in your manual and make sure the two truck follows all the instructions.
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Old 07-04-2011, 01:29 PM   #4
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Before I did anything myself I would go to an Authorized Allison service center and have them check for any codes stored in your transmission. Looks like you're in Idaho. Here are 5 Allison centers in Idaho. You can check for more at:

Allison Transmission

-Tom

Cummins Rocky Mountain, LLC
Allison Dealer
8949 South Frederal Way
Boise , ID 83716
Phone: 208-336-5000

Smith Power Products, Inc.
Allison Distributor Branch
4045 Transport
Boise, ID 83705
Phone: 208-345-1500

Diesel Depot (K-Bovs, Inc.)
Allison Dealer
1944 S 2800 W
Aberdeen, ID 83210
Phone: 208-397-4138

Freightliner of Idaho-Twin Falls
Allison Dealer
1992 Kimberly Road
Twin Falls, ID 83301
Phone: 208-733-7035

Rush Truck Centers of Idaho, Inc.
Allison Dealer
322 South 600 West
Heyburn, ID 83336
Phone: 208-677-8848
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