Duramax with a 4L80E
- Thread starter cbarnett_2500
- Start date
I'd be really surprised if he could kill that rearend with a stockish Dmax. Unless he was towing stupid heavy or somehow able to launch it with a bunch of power.
I know BIGLEY was putting down mid 600's through his in his 88 DURAMAX swapped truck, and couldn't kill it with years of boosted launches.
Yeah it does. It's still a strong axle though. The previous owner swapped the gears from 3.73 to a 4.10. It's a strong truck, for a gassy. Before my father installed his goosneck hitch, we used my truck for hauling a Kubota full size tractor with a front end loader and harrow. The goosneck was a 30 foot goosneck. The engine struggled going uphills, but other than that, it pulled fine. The only REAL problem was the exhaust. I was straight piped when I pulled it.
Good God, I hope not. Thats what I had built for my half ton, Detroit, girdle and all.
If it were my ride I wouldn't worry Tom. I tend to post on the safer side than what I would actually run. I honestly don't see you having an issue with breakage beyond the norm.
Edit: To further clarify my previous post, I meant launching it with a pile of power and lots of weight might cause an issue on that 14 bolt.
I wasn't trying to say the 9.5 14 bolt is a ticking time bomb in this application but that it is less than ideal. I've owned trucks with them and they held up to a lot of weight and more weight then we should have been towing with a 3/4 ton truck just fine.
Also I keep forgetting the op doesn't want to modify the motor or hot rod the truck.
Also I keep forgetting the op doesn't want to modify the motor or hot rod the truck.
He swapped in the 14 bolt semi floater 9.5" after he tore up the 10 bolt was what he wrote on his site. He i stil lrunning the 8.25" IFS in the front end. And I believe the weight on his truck is pretty close to 5500. The same truck as his with a 350 weighs close to 5000, so add in the extra weight of the DURAMAX/ALLISON combo, and he should be pretty close. I forget now what he posted it weighed. I know I asked him some questions about it a few years back after I did some damage to mine from a boosted launch.