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125 Posts
I think its great and no problems. Much more truck than i really need though.
 

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693 Posts
Yea, My gas mileage has been so much better that diesel prices are going up again ):h
 

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1,209 Posts
6th is beautiful on the highway. 70mph and the engine is purring at @ 1750rpms. Very easy to speed with.
 

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283 Posts
I've had one problem twice that will be hopefully repaired Tuesday. Twice it got stuck in first gear and wouldn't shift up. Other than that, the Allison is a smooth shifter.
 

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9,606 Posts
Love it
 

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60 Posts
I have about 6,000 miles since Jan 06. I think it is really a nice package - especially with the duramax. Smooth shifts that I often do not even feel. My one beef would be with the dealer when I went in to buy a spin on filter and he wanted 22 dollars and some change. I commented to the service manager that that seemed like it was a bit steep and he told me he paid about 16 via GM. Needless to say I left the filter on the dealer counter and ordered several genuine allison filters from a supporting vendor - for about 10 dollars each. I was very disappointed in both GM and the dealer for not providing a better value in the filter. However I really like the transmission - so far.
 

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511 Posts
6th is beautiful on the highway. 70mph and the engine is purring at @ 1750rpms. Very easy to speed with.
:exactly: The Allison should have been a 6 speed when they first came out with the Duramax. I'll drop mine down into 5th every now & then on the highway, & it just seems like the engine is running way too fast. I can't imagine what it would be like driving my old LB7 with the 5 speed Allison now that I have an LBZ. (And I never had any complaints with the LB7/Allison combo when I still owned it.)
 

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1,774 Posts
Love the 6 speed. 50,000 on mine with no problems. LOTS of towing.
 

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825 Posts
I want a 6 spd! :(
 

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373 Posts
Mine started out running hot. Guess it had to work itself thru, because now she runs 150-200 degrees. Never had any shifting issues either. The tow mode is still hillarious to listen to. Sounds like a school-bus! I think it's the best tranny I've ever owned...
 

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174 Posts
trans is second best part of the package. totally awesome truck.
 

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346 Posts
The only thing that I would change would have to be the closeness of the lower gears. I try to baby it until 5th and the gears are just too close, 200-300 RPM difference. Id prefer there to be 600ish, But once I hit 5 bam good amounts of power. Mind you there is plenty there in the low gears, but i want the 1250-1400 RPM building power vs 1700-1800 RPM power.
 

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174 Posts
The only thing that I would change would have to be the closeness of the lower gears. I try to baby it until 5th and the gears are just too close, 200-300 RPM difference. Id prefer there to be 600ish, But once I hit 5 bam good amounts of power. Mind you there is plenty there in the low gears, but i want the 1250-1400 RPM building power vs 1700-1800 RPM power.
650 lb/ft of torque at 1600 rpm is pretty much all you are going to get. maybe your tach is wrong:D . pulled with pretty much all models 6.9 ford, 7.3 non turbo, 7.3 turbo, 6.0 ford and even dodge cummins 2005, and the duramax is by far the strongest light truck i have ever towed with.( not sure if light truck is right terminology but i am sure someone will correct me if i am wrong:) )
 
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