need help deciding rear gears... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lowriden58 · 04-09-2008, 03:13 AM

ok im pretty much new here

but anywho.. here is my specs.

fully built 355 10.5:1, comp 284/296 cam, AFR 195 heads, edelbrock airgap, holley 750 double pump, MSD HEI, running serpt setup.

trans is a TCI streetfighter 350 with a b&m 3k stall.

now for the "goodies"

ill be running a 200shot of NX. I just pulled the rear apart and found 3.07 gears and a "open" diff.

what gears would you guys run? im thinkin a 4.10 myself.. maybe just maybe a 4.56. ill be on 28" slicks. Thanks for the help
*edit* forgot to mention its a 71 C10 LWB with a 12bolt

1968SWBBigBlock · 04-09-2008, 05:10 AM

Street - 4.10 or 3.73
Strip = 1/4 = 4.56 or 1/8- 5.13

ChevyFan24 · 04-09-2008, 05:18 AM

I agree with 1968SWBBigBlock .

Longhorn Man · 04-09-2008, 06:09 AM

if it's street, and you have a non lock up tranny, you'll need to be closer to the 4.10 instead of the 3.73.

lowriden58 · 04-09-2008, 03:44 PM

cool, thanks guys. truck is gonna be street/strip and some light hauling here and there so ill just go 410s

04-09-2008, 03:13 AM	#1
lowriden58 Registered User Join Date: Jan 2008 Location: Chesapeake Beach, MD Posts: 812	need help deciding rear gears... ok im pretty much new here but anywho.. here is my specs. fully built 355 10.5:1, comp 284/296 cam, AFR 195 heads, edelbrock airgap, holley 750 double pump, MSD HEI, running serpt setup. trans is a TCI streetfighter 350 with a b&m 3k stall. now for the "goodies" ill be running a 200shot of NX. I just pulled the rear apart and found 3.07 gears and a "open" diff. what gears would you guys run? im thinkin a 4.10 myself.. maybe just maybe a 4.56. ill be on 28" slicks. Thanks for the help edit forgot to mention its a 71 C10 LWB with a 12bolt __________________ 71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 http://i195.photobucket.com/albums/z...en58/001-2.jpg Last edited by lowriden58; 04-09-2008 at 03:16 AM.

04-09-2008, 05:10 AM	#2
1968SWBBigBlock Active Member Join Date: Oct 2006 Location: Ohio Posts: 1,643	Re: need help deciding rear gears... Street - 4.10 or 3.73 Strip = 1/4 = 4.56 or 1/8- 5.13 __________________ 1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles 18.5" x 31" Hoosier Pro Street Radials ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree

04-09-2008, 05:18 AM	#3
ChevyFan24 Junior Member Join Date: Nov 2006 Location: Indiana Posts: 181	Re: need help deciding rear gears... I agree with 1968SWBBigBlock .

04-09-2008, 06:09 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: need help deciding rear gears... if it's street, and you have a non lock up tranny, you'll need to be closer to the 4.10 instead of the 3.73.

04-09-2008, 03:44 PM	#5
lowriden58 Registered User Join Date: Jan 2008 Location: Chesapeake Beach, MD Posts: 812	Re: need help deciding rear gears... cool, thanks guys. truck is gonna be street/strip and some light hauling here and there so ill just go 410s __________________ 71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 http://i195.photobucket.com/albums/z...en58/001-2.jpg



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