You are logged in as a guest. ( ) Allison transmission problem on a Duramax:: -> Message format Posted 2/15/2011 21:54 (#1616472) Subject: Allison transmission problem on a Duramax West Texas Son called me last week after the cold spell and said transmission was leaking.
Ok, I ask where and how bad. He sad it quit driving, was shifting hard and then quit moving.
I have a 2002 Chevy crew cab 2500 HD Duramax/Allison. Going into reverse with a 'SLAM' now and i am pretty sure it is stuck in 3rd gear. Allison transmission not right. Discussion in 'Chevy Trucks' started by DuramaxPowered, Dec 23, 2007. All these problems could also be due to a problem with the wiring harness that travels. Duramax Problems Common Problems with the 6.6L Duramax Diesel. The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. The Duramax engine and Allison 1000 transmission have some common problems inherent to their design. Some of these issues can be prevented via.
I said, ok, it's out of oil. He said no, it's still full. I go and pick it up.
Took it to transmission shop where there where 5 other Duramaxes with the same transmission problem. Front seal blew out on the pump due to the cold. (below 0°F sever times where he's at ) But all other pickups were still able to drive, mine wasn't.
Except for a second or 2 at a ttime. He called me today (transmission guy ) said they pulled pan. Asks me how long it had been since pan had been off.
Fallout script extender not working. I go Oh sh!t. Here it comes.
I told him it had been a good while as far as I knew. Well he goes on by stating that everything was fine with the transmission, it looks good and drives fine now, ( except for the leak ), after he cleared all the codes. Apparently the computer shut it down after it lost the oil. ) Then his question was, did I still want to go ahead and go thru it, put some upgrades in it etc. (larger C1 clutch etc ) Since we both thought it was out the plan was to go ahead and overhaul it and put some beefier parts in it to handle more HP and torque. I guess what I'm asking is what would you do. As is now, to fix the pump is going to be just under $1000.
( doing transfer case pump rub upgrade included ) To go thru the tranny and add some beefier parts etc wil run right around $3000, give or take a $100. Money is very tight. (I just got back from vacation in Holland! Lol ) Truck has 185.000 miles, it's an 02 Duramax 4x4.
This short guide is will hopefully help you diagnose simpler Allison Transmission problems. Allison Transmissions have been around for a hundred years and have set the industry standard for durability.
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The odds are pretty good that you’ll never find your way here, but if you did lets get this figured out! Limp Mode on Allison 1000 Modern Allison Transmissions come with a limp mode installed. This is a different shift table that allows the transmission to protect itself from catastrophic failure. You should always assume that this isn’t “bogus” and try and get your transmission. This limp mode locks the transmission into third gear, and keeps the torque converter from locking up. It also keeps the transmission from going into reverse!
Keep that in mind. You don’t want to get stuck somewhere that you can’t back out of. The limp mode is often activated by things an excessive of slippage by the transmission. Here are some common conditions that can trigger a limp mode situation. Towing: If you are towing a heavy load (especially up a steep grade) you can often activate the limp mode.
This is certainly can be an inconvenient time for this to happen. Third gear should pull a load fast enough on the highway, but it can be challenging to get a load moving.
Excessive Heat: If the transmission overheats, that can cause it to slip as well. If you are noticing this problem during hotter weather, you may be able to keep it from happening by installing a transmission cooler. They can be found cheap on Amazon and don’t require a lot of mechanical knowledge to install. Heat issues are the number one killer of this transmission. Do your best to protect the investment.