4.11's???
08-22-2017, 10:41 AM
#1
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4.11's???
This is probably a stupid question but is this a price for front and rear 4.11's. I thought they where a lot more expensive
1999-2008 Chevy 4wd GM 8.6" 8.25" IFS Master Install 4.11 Gear Pkg - Ron's Machining Service
With my 22 x 10" and 33" I think some gears would help pulling my boat tremendously, I have the 3.42 now. How much should an install run. I'm not sure if it's something I could do my self since I never done anything like that before.
1999-2008 Chevy 4wd GM 8.6" 8.25" IFS Master Install 4.11 Gear Pkg - Ron's Machining Service
With my 22 x 10" and 33" I think some gears would help pulling my boat tremendously, I have the 3.42 now. How much should an install run. I'm not sure if it's something I could do my self since I never done anything like that before.
08-22-2017, 01:43 PM
#2
This is probably a stupid question but is this a price for front and rear 4.11's. I thought they where a lot more expensive
1999-2008 Chevy 4wd GM 8.6" 8.25" IFS Master Install 4.11 Gear Pkg - Ron's Machining Service
With my 22 x 10" and 33" I think some gears would help pulling my boat tremendously, I have the 3.42 now. How much should an install run. I'm not sure if it's something I could do my self since I never done anything like that before.
1999-2008 Chevy 4wd GM 8.6" 8.25" IFS Master Install 4.11 Gear Pkg - Ron's Machining Service
With my 22 x 10" and 33" I think some gears would help pulling my boat tremendously, I have the 3.42 now. How much should an install run. I'm not sure if it's something I could do my self since I never done anything like that before.
That is for the front and rear diffs.
If you have a 6spd, get 4.56s.
08-22-2017, 01:53 PM
#3
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Thread Starter
you don't think 4.56s will be turning to high of an RPM at 75 with 33's even with the 6 speed.
I thought about 4.30's
I thought about 4.30's
08-22-2017, 03:01 PM
#5
If I did these calculations right using an online mph calculator here are the results.
Using the 6L80e with a 4.56 rear gear with 33in tires, a .667 6th gear ratio and a 1.1 transfer case ratio the rpms are roughly 2000-2100 at 65 mph.
Then it bumps up to around 2300ish at 75mph.
Using the 6L80e with a 4.56 rear gear with 33in tires, a .667 6th gear ratio and a 1.1 transfer case ratio the rpms are roughly 2000-2100 at 65 mph.
Then it bumps up to around 2300ish at 75mph.
08-22-2017, 03:05 PM
#6
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Well that doesn't sound that bad. Pulling my boat in 5th around 65 I think I'm running right around 2400 rpms. With these 33's it wants to down shift to 4th at the smallest of hills.
08-22-2017, 04:25 PM
#7
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I was wrong 5 gear at 65 is 2000 RPMs now with 33's and 3.42's
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08-24-2017, 08:59 AM
#9
Since you are concerned about 5th gear @ 65 mph for towing:
3.42 = ~1900 rpm
4.10 = ~2300 rpm
4.30 = ~2400 rpm
4.56 = ~2600 rpm
Same setup @ 75 in 6th for further comparison:
3.42 = ~1750 rpm
4.10 = ~2100 rpm
4.30 = ~2200 rpm
4.56 = ~2350 rpm
I have been considering 4.10s myself when I have to eventually open up the front differential for a rebuild.
3.42 = ~1900 rpm
4.10 = ~2300 rpm
4.30 = ~2400 rpm
4.56 = ~2600 rpm
Same setup @ 75 in 6th for further comparison:
3.42 = ~1750 rpm
4.10 = ~2100 rpm
4.30 = ~2200 rpm
4.56 = ~2350 rpm
I have been considering 4.10s myself when I have to eventually open up the front differential for a rebuild.
08-24-2017, 09:36 AM
#10
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Thread Starter
Thanks for that
I think I would rather have 4.30s since we do take my truck for family trips to the beach. So I do drive at 75-80 mph some. I'm just not sure if 150 RPM would make a difference in MPG. If it doesn't I'll just get 4.56
I think I would rather have 4.30s since we do take my truck for family trips to the beach. So I do drive at 75-80 mph some. I'm just not sure if 150 RPM would make a difference in MPG. If it doesn't I'll just get 4.56