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| | | Forums66 Topics128,076 Posts1,055,922 Members48,430 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: May 2013 Posts: 5 New Guy | | New Guy Joined: May 2013 Posts: 5 | So I pulled my rear end out put hidts 4 link suspension in and I found a 338:1 gear ratio that's a lot better then 411 that i have but can you change your axels to 5 x4.75?.... My next option is ford 9 " we'll I think I found one it rusty diff is sitting in pail of diesel fuel but I can't tell for sure if its one the diff has on the case and " x " with two dots " . " on ither side of the x .....wat does that mean lol and to get axels out we just had 5 bolts on ither side then axel will come out with tires on if that helps and the diff to hold to the housing is 11 bolts | | | | | Joined: Feb 2001 Posts: 4,095 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 4,095 | I have a 1979 nova and it was almost a bolt in except for the spring width. mine only has a 2.73 but it works fine in flat land Indiana and even moderate hills. i have been in the smoky mountains and no problems. i should mention i have a s10 5speed and in the hills i use 4th gear.
Last edited by WE b OLD; 07/19/2013 6:30 PM.
Ron, The Computer Greek I love therefore I am.1954 3100 Chevy truckIn the Gallery 2017 Buick Encore See more pix1960 MGA Roadster Sold 7/18/2017
| | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | We B Old, I bet you get great gas mileage! Mike B  | | | | | Joined: Oct 2006 Posts: 843 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 843 | 74 Nova 10 bolt,3:08 gear | | | | | Joined: Dec 2001 Posts: 14,522 Moderator: Welcome Centre, Southern Bolters, Legion Hall | | Moderator: Welcome Centre, Southern Bolters, Legion Hall Joined: Dec 2001 Posts: 14,522 | 79/80 Malibu with 2.73 and runs great in my modified 37. | | | | | Joined: Feb 2001 Posts: 4,095 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 4,095 | I have a gotten as high as 26.6 mpg. but my usual average on a long trip like KANSAS City i average 20 mpg. around town 15-16.5.
Ron, The Computer Greek I love therefore I am.1954 3100 Chevy truckIn the Gallery 2017 Buick Encore See more pix1960 MGA Roadster Sold 7/18/2017
| | | | | Joined: Jul 2005 Posts: 57 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 57 | 99 S-10 4x4 Posi trac & disc brakes about 100 bucks Craigs list
Try prayer as the first response rather than a last resort ...
| | | | | Joined: Jun 2011 Posts: 150 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 150 | First time when the original burned up it was a 3.08 out of a 70 Coupe de Ville. With the 235 and 4 speed it was OK on flat ground but didn't have enough ratios for the hills. Now it has a 2.73 out of a 74 Camaro and with the mildly breathed-on 350 and TH 350 it does fine. Although at 70-75 I do wish for an overdrive. | | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | Baba, How tall are your tires? You must be running some pretty short tires to be wanting an overdrive with a 2.73... | | | | | Joined: May 2013 Posts: 5 New Guy | | New Guy Joined: May 2013 Posts: 5 | I found a ford 9" only thing is its 57 3/4 outside to out side and wats on my truck is 62" anyone used one like this before and it worked with off set rims? | | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | Of course it would work with offset wheels. If you don't mind the custom look, that is. | | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | 12-bolt with 4:10 and eaton posi. stock 2 piece drive-shaft matched to a tci th400 super street fighter. 18x10 weld racing evo slashers in the rear with 285/40 goodyear supercar tires. holds up fine and leaves 1/8 mile long black strips when im feeling stupid.
1965 c-10 lwb 741hp blown 383cid. 4-6 drop by early classic enterprises. a completely useless vehicle but fun to mash around in.
I can explain it to you, I can't understand it for you.
| | | | | Joined: Dec 2009 Posts: 292 Shop Shark | | Shop Shark Joined: Dec 2009 Posts: 292 | First time when the original burned up it was a 3.08 out of a 70 Coupe de Ville. With the 235 and 4 speed it was OK on flat ground but didn't have enough ratios for the hills. Now it has a 2.73 out of a 74 Camaro and with the mildly breathed-on 350 and TH 350 it does fine. Although at 70-75 I do wish for an overdrive. i have the same 74 camaro 2.73 works great.with the 5.7 vortec and mild cam it will smoke the tires till i let off. but yea overdrive would be nice.
Last edited by johns truck; 09/01/2013 6:49 AM.
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | With a 2.73, which is a rather high gear for a truck, there should not be a need for an overdrive at any normal road speed. Now if you were going for some sort of land speed record at Bonneville, that would be a different story.
Bill Burmeister | | | | | Joined: Jan 2012 Posts: 162 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2012 Posts: 162 | I'm installing an 8.8 out of a Lincoln MK7 in my burb. It has 3.27:1 gears and disc brakes. Coupled to a T-5 and a stock 235, it should roll on pretty nicely! | | | | | Joined: Dec 2009 Posts: 9 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2009 Posts: 9 | I'm running a '57 Oldsmobile rear, with a '64 Olds posi unit which will run either 4.10s or 4.88s. It is 60" wide and fits the frame well, however, I will need custom offset on the wheels. It's not a cheap option, but my build is a mid to late '60s drag truck, so it fits the bill for me.
Every time you use it is one less time it's going to work...SO USE IT UP!
| | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | Be sure your tires are at least 30" or you have overdrive with those gears. I've got 4:10 with 27" tires. Top speed is 135 at 7500rpm. Th400 trans. Thank god redline is 8000rpm
Last edited by Hollow65; 09/02/2013 11:55 PM.
I can explain it to you, I can't understand it for you.
| | | | | Joined: Aug 2012 Posts: 40 New Guy | | New Guy Joined: Aug 2012 Posts: 40 | I narrowed a 14 bolt!!!
still waiting on the transmission before I put gears in. either 3.73 or 4.10s
After searching for a year I found the next project! 46' 1/2 ton in pieces! took 2 trips to get it home, but most of the hard work was already done!!! -jerry "Phil" the 46' | | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | Just blew my diff lol. Only took 12 years of abuse. Went to get burritos and thrashed the diff. Off to San Diego gear and axle on Friday.. $500 burritos lol
Last edited by Hollow65; 09/04/2013 11:03 PM.
I can explain it to you, I can't understand it for you.
| | | | | Joined: Mar 2013 Posts: 186 'Bolter | | 'Bolter Joined: Mar 2013 Posts: 186 | Using 12 bolt posie from a 75 thru78 chev sub 4x4 has 6 stud,has 3.07 or 3.08 gears.have a monza saginaw 4 spd.would prefer 3.55 or 3.73 ratio.54 pickup wih 235 | | | | | Joined: Feb 2009 Posts: 269 'Bolter | | 'Bolter Joined: Feb 2009 Posts: 269 | Purchased a rear end/suspension kit from TCI. currie 9" (3.25 ratio) w/disk brakes 4 link w/airbags -picture , picture- .
Last edited by Bread; 09/05/2013 6:59 PM.
| | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | | | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | Or more than some, less than others...
I can explain it to you, I can't understand it for you.
| | | | | Joined: May 2013 Posts: 5 New Guy | | New Guy Joined: May 2013 Posts: 5 | Hey I have my rear end in not finding rims tires I want for it. And my trucks couple hours away I been working crazy but here's thing I'm trying do math here I found tires rims there 4.5" back spacing with 10" tires so if I'm adding right it going be 5" back spacing I have a rear end 573/4 and wheel spacers 1.25 and putting rotors on for disk brakes not sure how thick they are but I'm thinking going be 573/4 + 2.5= 601/4 - 10" = 50 1/4 from inside tire to tire can ppl tell me is it going fit in my 49 chevy pick up ? | | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | Man that's Chinese to me. I suggest bolting it up and then measuring. Cheaper than guessing. Even if it's a few hours away. Inside wheel well-inside and outside-outside. Leave some room for body roll and suspension lift and drop. I've peeled the labels off tires by guessing things fit.
I can explain it to you, I can't understand it for you.
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