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02-27-2012, 09:09 PM #1
6" Fabtech lift kit on a 02 2500 8.1 liter Vortec.
I'm currently trying to decide on lifting my Silverado. I want to lift it 6" with like 37" or 38" tires on it, but I want to know how much this will reduce my towing capacity. If there is anyone who has lifted this size engine be for I would love some advice and help.02 Silverado 2500hd|496ci bigblock|Botch fuel pump replacement|True dual Magnaflows|UV-10 Jensen head unit|All four speaker Kickers|Kicker tweeters|10in Kicker sub|250watt Kicker Amp|Volant Cold Airintake|PowerAid Throttle Body Spacer|33in Nitto Trail Grapplers|8000k Hid Halo Lights
02-27-2012, 09:57 PM #2
37's will be just fine..but ur gonna need a hella drop hitch!!!! lol
2011 Silverado "Black Widow Edition"
35" Mickey Thompson Baja ATZ's
20" American Racing Rims With -24 offset
Recon Smoked Led Tail and 3rd Brake Lights
MCX Conversion Package.....
Custom Dual Exhaust
Custom Chrome Gauges With Red Back-Lighting
Black Widow Badges
Back-up Camera System
Full Length Nerf bars
Pioneer Head Unit
Custom Sub Box With Two Competition 10" JBL's
Rockford Fosgate 1000w Prime Amp
03-01-2012, 06:42 PM #3
if you go that big with the tires you will want to regear or you will lose some of your low end power for towing. On the hitch yes you will need a bigger drop hitch. I found one for my truck that drops 7.5" and you can adjust it with the trailer attached for leveling. I also have one that drops 11.5 inches that i use for a small trailer I tow . I got the 11.5" drop one from harbor freight for like 25 dollars but like I said that one just tows a small 1500lb trailer. The other one I use for the heavier trailers.David
2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
1960 Land Rover Series II 88
2002 Nissan Altima (My Commuter)
2013 Toyota Avalon Limited (Wife's Car)
NRA Life Member
03-03-2012, 01:10 AM #4
Ya on the topic of re-gearing, I was just kicking around the idea of a super charger on the 8.1 liter. Only problem is my model Allison only handles like 350 or 450 horse powers. Where the super charger ads 150hp. Just a wild idea I've seen people do it in YouTube its some crazy power.
03-03-2012, 01:34 AM #5
I don't remember if the 2500's are IFS or not. I will assume they are. I think that a 38" tire is too much for that suspension. I understand it is a 2500 but the added weight of the tires seems too much to me. Not sure how they beefed it up for the added capacity so I may be way off base with what I just said. If that is the case I am sorry for wasting your time.
03-04-2012, 11:57 AM #6
To the OP. Especially if you go real big tires with the supercharger i think gears would be important. With all the extra power and then weight of the tires. Breaking things would be a good possibility. Transmission rearend etc.
03-04-2012, 07:25 PM #7
Well I'm not to educated on the Allison trany but I know mine only can withstand 450hp and if I super charge it I know I'm going to have to replace it. What I want to do it replace it with a Allison that can take 550hp safely and I'd also put a chip in it to help with the shifts (not sure which one to go with yet) but I think i might just superchage it cause all that power and a lift kit wouldn't set to good.
03-29-2012, 01:30 AM #8
When are you planning to get the lift done? I'm really curious to see how it turns out with the 37s. I've been considering doing a 4" if I could fit 35s. I should be able to do it, but everything I've read says 6" for 35s. However, I know the tires I have on the stock truck right now are about a 32.5" diameter.
To Be Completed (Eventually):
6" BDS Suspension lift | KingShocks Front and Rear Coil Overs | 4.56 Gears | 35" A/Ts (TBD) | Cervinis 07-12 Silverado Ram Air Hood | Fab Fours Front Winch Bumper (CS07-H2051-1) | Fab Fours Full Size Rear Bumper (CS07-W1850-1) | RX-2 Series Main Grille (Black) | Line-x Bed and wheel wells | Skid Plates | Rizor Automated Tonneau Cover | Custom Bed Insert | RBP RX-3 Series Nerf Bars | Kenwood Excelon DNX9990HD | JL Audio Stealthbox (2x500RMS) | JL Audio HD 1200/1 Class D Mono Amp | JL Audio C5-653 Components (Front) | JL Audio C5-650 Components (Rear) | JL Audio Slash v2 300/4v2 Class A/B Amp
03-29-2012, 11:56 AM #9
2002 2500 should be able to fit 35" tires with a 4" lift, 37" with 6". Try a BDS suspension lift, they offer 6.5" or 7".
2002 Chevrolet Silverado 1500 z71 1985 Chevrolet Silverado k10 2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax 6.5" BDS Suspension Lift Key'd to 9" Edelbrock Carb & Polished Intake Manifold & Valve Covers NAPC Race Transmission & NAPC Built Transfer Case EFI Live Comp Cam and Valvetrain Snow Performance Methanol Injection 35" Toyo Open Country Mud Terrain on 18" Ion Alloy 179's Headman Long Tube Headers and True Dual Exhaust FASS 150gph Titanium Series Pump AirAid Cold Air Intake with K&N Dry Filter & AirAid PowerAid Throttle Body Spacer 2" Suspension Lift 33x12.50r15 Tires PPE Tuner until i tune it with my EFI Live Pacesetter Long Tube Headers with Cats Gone True Dual Exhaust FlowPro 3.73 Gears Yukon Grizzly Locker with Mag-Hytec Cover & Traction Bars NGK Iridium Tips & MSD Ignition Plug Wires Baja Spare Tire Holder Leveling kit & 34.5" Nitto Grapplers 18" XD Rims Innovate LC-1 Wideband o2 Sensor x2 HID's all around LED taillights and 3rd brake light BDS Dual Steering Stabilizers Pioneer Double-DIN Touchscreen Navigation with Two 10" Subs under rear seat Electric Fan Autometer Pressure, Boost, and Pyro Gauges 4.56 Gears AFE Stage 2 Intake
03-30-2012, 09:17 AM #10
- Join Date
- Mar 2012
- Regina Saskatchewan Canada
- Blog Entries
http://www.transmissioncenter.net/allison1000.htm and i have found others out there as well.....
Last edited by Dirty Dog; 03-30-2012 at 09:20 AM.
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