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11-14-2009, 10:58 AM
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Junior Member
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Join Date: Nov 2009
Location: patuxent river, maryland
Posts: 28
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i have a habit of staying out of that damn box everybody talks about. lol ok that's it, i'm going with 4.10's. soon as i put the awd back in. 2wd was fun for a bit but two broken rear axles suck. and going back awd is cheaper for me than a 14bolt swap.
here is a vid of one of the breaks. turbo tahoe breaks axle - Car Videos on StreetFire
here is what i was talking about with the gears on the silverado. with 3.42's note how we walk on the 350z until he shifts. then the tire barks and it took forever to get boost back on. another 350Z vs 4.3L silverado - Car Videos on StreetFire
Last edited by 4.8t : 11-14-2009 at 11:14 AM.
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11-14-2009, 07:14 PM
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Turbo Moderator
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Join Date: Mar 2003
Location: San Marcos Texas
Posts: 4,084
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You are on the right track with your gearing thoughts. You need to get that big beast moving off the line. Most of us run a light truck and with the low first gear of the 4L60E need a little loading to get the boost at take off. If you put a trailer on the back boost is made very easy at any speed. This would be the same as having your truck with heavy tires. Also the same as brake boosting in a roll race. As you have figured out all you need to have is enough load to make full boost quickly in first gear.
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2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
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11-15-2009, 09:21 PM
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Senior Member
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Join Date: Nov 2008
Location: savannah ga
Posts: 252
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not trying to thread jack, but I have a set of 3.73s in the garage and was thinking about swapping them out for the 3.42s, but am a little unsure, what do you think quik?? 5.3 single cab, t-76
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Master power t-76 kbracing, Intercooled, 7psi, tr220 cam, patriot dual springs, 42lbrs, walbro, efans, 80e, tansgo, yank 3200.
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11-15-2009, 09:24 PM
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Senior Member
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Join Date: Nov 2008
Location: savannah ga
Posts: 252
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by the way I have a 30" tall tire
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Master power t-76 kbracing, Intercooled, 7psi, tr220 cam, patriot dual springs, 42lbrs, walbro, efans, 80e, tansgo, yank 3200.
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11-15-2009, 09:25 PM
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Senior Member
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Join Date: Nov 2008
Location: savannah ga
Posts: 252
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3.42
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Master power t-76 kbracing, Intercooled, 7psi, tr220 cam, patriot dual springs, 42lbrs, walbro, efans, 80e, tansgo, yank 3200.
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11-15-2009, 09:29 PM
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Junior Member
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Join Date: Nov 2009
Location: patuxent river, maryland
Posts: 28
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3.73 for you would be just like 4.10's for me due to tire size you have.
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11-15-2009, 09:40 PM
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Senior Member
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Join Date: Nov 2008
Location: savannah ga
Posts: 252
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what kind of difference do you think it would make. would it be worth the swap is what I am getting at I guess.
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Master power t-76 kbracing, Intercooled, 7psi, tr220 cam, patriot dual springs, 42lbrs, walbro, efans, 80e, tansgo, yank 3200.
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11-15-2009, 09:54 PM
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Your God
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Join Date: Nov 2007
Location: Pittsburgh, PA
Posts: 4,454
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i personally would run the 373 with 30" tire.
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I boost not because I have to but, because its who I am
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'04 Tahoe AWD,5.3L trickperformance turbo kit, magnaflow muffler and SC3200. 12.89 
Linear Mode
