where to buy gears

travishale84 · May 30, 2013

im trying to find out where to buy gears for my 2011 seirra. so far my searches have turned up empty. someone on here has to know of a good website to buy these gears. from what i have gathered since i have 3.73's that 4.10's wouldnt make much of a difference and that 4.56 is what should be done to notice a difference.

my lil 4.8 feels like its flat on its face with my nitto 305 70 17's. my other question is and i know it doesnt belong on this post, so dont chew my @$$ please, does anyone know if Black bear can retune my speedo or is that something my lovely dealer gets the pleasure of porking me on?

I do know BB is going to get some new data to log to help with the shifting, and they still havent gotten my 2nd data recording to make sure everythings going good.

Thanks for any help.

travishale84 · May 30, 2013

also is there a website that is exclusive to gmt 900s hop ups?

do i need to re gear the front differential as well? dumb question i know...

txab · May 30, 2013

BB can correct the spedo. You'll need to re-gear both diffs

Carder09 · May 30, 2013

http://www.ringpinion.com/b2c/ProductDetails.aspx?ProdID=5676&Product=YG_GM8.5-456&Brand=Yukon_Gear_Ring_and_Pinion_Sets&ShowAA=True&Year=2011&Model=Silverado%201500%201/2%20Ton&DriveType=Rear%20Diff%20-%204WD&DiffId=218&Source=DiffWizard

travishale84 · May 30, 2013

thanks guys.

travishale84 · May 30, 2013

thanks that website is awesome. looks like 4.56 is the way to go, theyre all sold out. haha

also, i notice that there ar OEM parts which are expensive and then there are USA standard sets which are roughly 1/3-1/2 the cost. so a set of 4.56 gears in the USA standard is less than $350, i would just need a shop to slap them in for me.

Carder09 · May 30, 2013

Just don't forget what texasab said, grab two gear sets if you have 4WD.

cparks555 · May 30, 2013

http://www.ronsmachiningservice.net/

I don't have any personal experience with them, but their name comes up in just about every gear thread I've read.

travishale84 · May 30, 2013

So I'm sure there have been plenty of people on this forum who have really geared. Anyone want to chime in? I have a little more than basic knowledge about trucks as far as suspension, exhaust, tires, wheels. But as far as axles, gears and what's good or not I'm pretty green.

Carder09 · May 30, 2013

Where is BlackOut at lol? I want to say if you plan on 35in tires or larger, go ahead with 4.56 gears, I think 4.88's would be suggested also.

cparks555 · May 30, 2013

^^^ I agree, Blackout would be your best bet for solid info.

travishale84 · May 30, 2013

see the problem is im going to be running 265 70 17s in the winter. so i need some good all around gears. im thinking 4.88 might be a little bit much. i know if i put 35s on with the lift/wheel set up i have now i would need to cut out some fender (not an option). so 305's are probably as big as i would go on this truck.

thanks for all the information

ohenryx · June 26, 2013

I have a 2003 GMC Sierra 1500, 5.3L, 2wd, with a 3.42 rear end. I'm thinking about a 3.90 or a 4.11 rear gear. I see from this thread about what I can expect to pay for the ring and pinion. But I know full well that I don't want to attempt this setup on my own. Any ideas / recommendations on a shop in the greater Houston area, and approximate cost?

blackout07 · June 26, 2013

see the problem is im going to be running 265 70 17s in the winter. so i need some good all around gears. im thinking 4.88 might be a little bit much. i know if i put 35s on with the lift/wheel set up i have now i would need to cut out some fender (not an option). so 305's are probably as big as i would go on this truck.

thanks for all the information

305/?/?

LongrangeLauber · June 26, 2013

From what Blackout has told me, 4.56's are for 35's, and 4.88's are for 37's. If I were you, I would go with the 4.56's. Kind of sucks that there is not a gear ratio between 4.10 and 4.56. Here is a website to show you the rpm's based off your tire size, gear ratio, transfer case ratio, and any gear in your transmission (it says cruising rpm, but I used it for all the gears in my tranny):

http://www.novak-adapt.com/knowledge/gearing.htm

I still haven't decided if I want 4.56's or 4.88's when I get 37's. Its an expensive decision, since I am completely rebuilding everything in both differentials