2500HD gear swap (the other way)
08-17-2009, 01:48 PM
#61
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Are those tranny's as strong as a 4l80?
if so GRAB ANOTHER GEAR!!!!
i my 6.0 pulls the 8880 lb trailer good at 2000rpm
i would imagine that you having a manual, 2wd etc. could pull even better than me at 2000rpm... i bet your milage would improve at 2000 rpm still runnin 65...
if so GRAB ANOTHER GEAR!!!!
i my 6.0 pulls the 8880 lb trailer good at 2000rpm
i would imagine that you having a manual, 2wd etc. could pull even better than me at 2000rpm... i bet your milage would improve at 2000 rpm still runnin 65...
08-17-2009, 05:39 PM
#62
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My understanding is you are not supposed to pull in overdrive. It is inherantly weaker, right?
Though, I admit I used 5th w the 4.10s, because I couldn't stand the high rpms on the highway. I pretty much did the swap so 4th gear would be more usable.
But 5th gear when empty has yielded what I consider great highway mileage for a 2500.
You may be right about getting more MPG while towing in OD, but I would hate to gamble and lose by having a failure.
Though, I admit I used 5th w the 4.10s, because I couldn't stand the high rpms on the highway. I pretty much did the swap so 4th gear would be more usable.
But 5th gear when empty has yielded what I consider great highway mileage for a 2500.
You may be right about getting more MPG while towing in OD, but I would hate to gamble and lose by having a failure.
09-14-2009, 08:59 AM
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Just towed the (~6500 lb) camper and got an average of 10.5 MPG using 4th (1:1).
Then got an average of 18.5 MPG driving home (not towing) using 5th (.73 OD).
Both a mix of interstate (65-70 mph) and highway (55-60 mph).
I am very happy w this mod!
Then got an average of 18.5 MPG driving home (not towing) using 5th (.73 OD).
Both a mix of interstate (65-70 mph) and highway (55-60 mph).
I am very happy w this mod!
Last edited by subtlez28; 09-14-2009 at 09:05 AM. Reason: added detail
12-16-2009, 10:19 PM
#66
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Still very happy with this mod. Driving around town is much less hectic and interstate is much quieter. The road manners are much improved and I feel no lack of acceleration or towing ability.
I see no downside to this mod with a manual trans. I suspect it would also work w an auto.
I see no downside to this mod with a manual trans. I suspect it would also work w an auto.
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