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#26 |
Newbee
Join Date: Jan 2010
Location: Phoenix, Arizona
Posts: 1,406
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Re: ReGearing Questions - Noobie
And a new setup pinion bearing, dial indicator, calipers, and a depth checking tool.
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#27 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Ill have to take my rear apart at somepointbabd check that out for sure. I just got home and while driving Down the highway at 50mph (it's raining) I was at 1750 rpms in drive idk if that helps
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#28 |
Newbee
Join Date: Jan 2010
Location: Phoenix, Arizona
Posts: 1,406
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Re: ReGearing Questions - Noobie
Yes, pull the cover, and count the teeth. Divide the two, and it will tell you the ratio. It may also say it on the ring gear.
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#29 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Alright I'll do that an get back to you this weekend.
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#30 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Just seeing this now, sorry bout that hah. But its funny im at the same rpm in 3rd, wonder if i do have 3.73s......
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#31 |
Registered User
Join Date: Feb 2011
Location: Under the Truck Dreaming
Posts: 706
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Re: ReGearing Questions - Noobie
Read this post here, it has some gearing infos....
http://67-72chevytrucks.com/vboard/s...d.php?t=568310
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72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks... |
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#32 | |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Quote:
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#33 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: ReGearing Questions - Noobie
xx
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#34 |
Registered User
Join Date: Jan 2014
Location: Peoria, IL
Posts: 1,450
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Re: ReGearing Questions - Noobie
With 35" tires, your truck isn't going to get good fuel economy, no matter what you do. 35's are pretty big for a 10 bolt equipped truck anyhow. If you're just driving on the street, not a big deal. Going off road, I see snapped axle shafts in your future.
If you stick with your stock setup, 3.73 or 4.10 would be a good gear setup for 35"s. If you go to a 700R4, I would seriously think about 4.56 gears. I think 4.10 would put alot of unneeded strain on the 700R4 when cruising down the highway at 60 Here's a gear calculator to play with http://www.ringpinion.com/Calculators/Calc_RPM.aspx If you're going with lower gears, why not just swap to axles from a 3/4 ton or 1 ton truck? Most of them are already in the 3.73-4.56 range and it would solve any strength issues. |
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#35 |
Senior Member
![]() Join Date: Aug 2008
Location: Long Beach, CA
Posts: 1,813
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Re: ReGearing Questions - Noobie
3/4 or 1 ton axle assemblies are a lot heavier than 1/2 ton axle assemblies. That will also affect acceleration and mileage negatively. How do you intend to use your truck? Also, what kind of a budget are you on?
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Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! |
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#36 |
Registered User
Join Date: Jan 2014
Location: Peoria, IL
Posts: 1,450
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Re: ReGearing Questions - Noobie
It's true that the bigger axles are heavier and take a little more power to turn, but so is the tire you're putting on them. When you consider that these are c-clip axles, you're playing with fire regardless if you're on the street or 4 wheeling. Take a look at the Interco website. The differece between a 33 and 35 can be as much as 20 lbs different, depending on application. Now consider this, the 35 can be as much as 50lbs heavier than the stock rubber that came on these trucks. That's alot of rotating mass.
http://www.intercotire.com/tires.php?id=9&g=1 At the very least, a 14 B semi floater in the rear would be some added insurance. It fills the gap between the stock 10 bolt and the Full float axles without being too much. |
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#37 | |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Quote:
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#38 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Hah, tbh id love some dana 60s. The truck is my daily driver and will be for years to come. and my budget... uhhh hah its a typical 18 year olds but id say 700 or so
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#39 | |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Quote:
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#40 |
Registered User
Join Date: Jan 2014
Location: Peoria, IL
Posts: 1,450
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Re: ReGearing Questions - Noobie
It has a 9.5" ring gear and heavier axle shafts than the 10 bolt.
GM started using in 3/4 ton trucks in 79. They used a 6 lug version of it starting with the 88-93 C2500 trucks. Some 3/4 ton six lug and 8 lug vans used it too. Some of the heavy 1/2 tons got them too. If I'm not mistaken, they're still using a version of it. http://www.fourwheeler.com/how-to/tr...rs-and-locker/ http://www.gmt400.com/forum/showthre...-9-5-ring-gear axle ID: http://www.nationwideparts.com/differentials.htm http://www.drivetrainamerica.com/t-sdl_technical.aspx If you find an 8 lug version, you can always swap to the 6 lug axle shafts http://www.moserengineering.com/cust...ine-axles.html http://www.4wheelparts.com/Drivetrai...9.5in.+14+Bolt Last edited by whitedog76; 02-23-2014 at 12:49 AM. |
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#41 |
Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: ReGearing Questions - Noobie
To swap in a 14 bolt you gotta move the spring perches since a 1ton uses wider springs.A lot of places on line sell swap kits that come with new spring perches shock mounts etc etc.The other thing is the driveshaft you can have one made or maybe get away with w conversion u joint.And when you get the 14 bolt make sure its from a pickup the cab and chassis one is narrower.
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#42 |
Registered User
Join Date: Jul 2008
Location: Bowie, MD
Posts: 313
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Re: ReGearing Questions - Noobie
just a thought - what about staying with the same gears and stepping up to a 383?
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#43 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Hmm never thought bout that, like that. Ive done minor work to my 305, headers, MSD high output 65,000 volts, edlebrock 650cm and a holly high rise intake, Iv'e entertained te thought of a 350 because all parts are interchangeable
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#44 | |
Registered User
Join Date: Jul 2008
Location: Bowie, MD
Posts: 313
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Re: ReGearing Questions - Noobie
Quote:
This is obviously considerably more expensive, but depending on budget: http://www.summitracing.com/parts/ml...make/chevrolet Just a thought, good luck whatever you decide. |
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#45 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: ReGearing Questions - Noobie
A tremendous difference between a 350 and a 305, same diff btw a 350 and a 383.
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#46 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
I'm aware, hah. Just being a daily driver and will be for years to come just trying to figure out the best set up
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#47 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: ReGearing Questions - Noobie
mileage or power or both ?
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#48 |
Registered User
Join Date: May 2012
Location: Pennsylvania
Posts: 132
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Re: ReGearing Questions - Noobie
Mileage, honestly I learned to drive in it and haven't really driven anything else so the power feels good, for now hah. I'm getting 10mpg right now
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35s, gm10bolts, gmc, lifted, regearing |
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