anyone running 6cy and 3.07 gears? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davidh · 11-02-2007, 08:01 PM

I have two 5lug rear ends, one is a 3.07 and other is a 3.73. truck has a 292 and 3speed. I was curious if anyone is running higher gears with their 6 cyl inliners and if they liked or did not. thanks

bad6772 · 11-02-2007, 08:09 PM

im running a 3.42 with a mild 250 6cyl and a 3speed.... drives just fine...in town and on the highway... i run about 65 70 on the highway...and about 2900 or 3100 rpms at those speeds......

wibilly · 11-02-2007, 11:44 PM

i think with the torque of a 292 3.07's would be great. if your not doing a lot of heavy towing in hilly areas

Brad · 11-03-2007, 02:16 AM

I tried 3.08's with my 250 and I really didn't like it- and don't recommend it for 250's especially if you actually work the truck. However, if your 292 isn't tired and worn, it may work ok with the extra cubes and torque. I think it actually might the more I think about it, as long as you aren't working the truck all the time.

I had to use alot more clutch with my 250 and just hope you don't get stuck in traffic on a hill!

**special-K** · 11-03-2007, 07:24 AM

Cars have 3.07s and trucks have 3.08s.They are tall far pulling off with a 3spd,which is the problem.A lower 1st will be desired.If you have a torquey 292 then it will be better.But,I just never liked the 1st gear in a 3spd for anything.The only truck I kept a 3spd in was a shortbed`68 with a 396.It rolled right out of the hole with that high 1st.I would have put a 4spd car trans in,but wanted it kept original.

chris71 · 11-03-2007, 09:26 AM

i had a 250 with 3.73's, i agree with the other guys, 3.73's good for off the line and around town, but on the highway not so good, i have 28" tires (not huge) and felt like the motor was topping out at like 65 mph. something to think about if you do a lot of highway driving or want to go 80.

67ChevyRedneck · 11-03-2007, 09:32 AM

Quote:

Originally Posted by chris71

i had a 250 with 3.73's, i agree with the other guys, 3.73's good for off the line and around town, but on the highway not so good, i have 28" tires (not huge) and felt like the motor was topping out at like 65 mph. something to think about if you do a lot of highway driving or want to go 80.

Same here. That's why I went to a 350 and 700R4. It was almost hammer down to get it past 65 and the engine was screaming. I had a 250, 3 spd, and 3.73.

davidh · 11-03-2007, 12:33 PM

Quote:

Originally Posted by chris71

i had a 250 with 3.73's, i agree with the other guys, 3.73's good for off the line and around town, but on the highway not so good, i have 28" tires (not huge) and felt like the motor was topping out at like 65 mph. something to think about if you do a lot of highway driving or want to go 80.

maybe if I ran 30" all terrains instead of standard 28" tires and the 3.73's I'd have a tad more highway. This truck will be used to work some but also want to go down the highways at 65mph.

Tx Firefighter · 11-03-2007, 11:58 AM

I ran a 292 in my truck for a good while with the 3.08 gear. The 292 pulled it just fine without complaint. The 350 in it now doesn't pull much better as a matter of fact. Don't underestimate the 292's torque.

BWisdom · 11-03-2007, 12:47 PM

I have a granny 4-spd with 292. I am thinking of installing a caddy rearend, disk brake with large 5-bolt pattern (like the half-tons) & correct width. The gear ratio is 2.32. How do you think this combo will work...granny is very low for the 4.11 rear now in the truck but seems like the 2.32 take-off should work...what are your thoughts?

davidh · 11-03-2007, 02:24 PM

Quote:

Originally Posted by BWisdom

I have a granny 4-spd with 292. I am thinking of installing a caddy rearend, disk brake with large 5-bolt pattern (like the half-tons) & correct width. The gear ratio is 2.32. How do you think this combo will work...granny is very low for the 4.11 rear now in the truck but seems like the 2.32 take-off should work...what are your thoughts?

I think there is too much gap between the granny low and 1st gear for that to be feasable.

**Palf70Step** · 11-03-2007, 01:10 PM

The 82 I had was a 250 with T350 and 2.75 rear. Off the line not great, but as a daily runner, in town and freeway, it held its own. Just don't expect it to pull a house off the line or go much above 70 on anthing other than flatland. BTW, it did not help MPG with it being that high a gear either.

67ChevyRedneck · 11-03-2007, 01:13 PM

Quote:

Originally Posted by Palf70Step

The 82 I had was a 250 with T350 and 2.75 rear. Off the line not great, but as a daily runner, in town and freeway, it held its own. Just don't expect it to pull a house off the line or go much above 70 on anthing other than flatland. BTW, it did not help MPG with it being that high a gear either.

There comes a point to where you get too high a gear and you're too low in the engines preferred rpm power band. Most GM motors are happy between 1800 and 2500 rpm.

BCOWANWHEELS · 11-03-2007, 01:50 PM

what about a 292, sm465 and 3.08 gears, 28" tires combo. think this is good for a work truck?

davidh · 11-03-2007, 02:29 PM

Quote:

Originally Posted by BCOWANWHEELS

what about a 292, sm465 and 3.08 gears, 28" tires combo. think this is good for a work truck?

that trans still has 4th gear as the same as a 3 speed, 1:1 ratio so only adding a granny gear

67ChevyRedneck · 11-03-2007, 01:11 PM

Your truck would probably be "weak" from the time you shift to 3rd until about 60mph when the rpms get back to 16-1700. Assuming a 29 inch tire. 2.32 is too high for a truck with large tires and weighs 3500-4000 lbs. That's my opinion.

BCOWANWHEELS · 11-03-2007, 06:18 PM

yes thats what i,am saying. with the 3.08 r&p gear it is had to pull out loaded so if you have the super low 1st. gear in the sm465 then all should be good right ?

11-02-2007, 08:01 PM	#1
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,220	anyone running 6cy and 3.07 gears? I have two 5lug rear ends, one is a 3.07 and other is a 3.73. truck has a 292 and 3speed. I was curious if anyone is running higher gears with their 6 cyl inliners and if they liked or did not. thanks __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

11-02-2007, 08:09 PM	#2
bad6772 Official Site Guitar Shredder Join Date: May 2006 Location: Oz Posts: 3,955	Re: anyone running 6cy and 3.07 gears? im running a 3.42 with a mild 250 6cyl and a 3speed.... drives just fine...in town and on the highway... i run about 65 70 on the highway...and about 2900 or 3100 rpms at those speeds......

11-02-2007, 11:44 PM	#3
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: anyone running 6cy and 3.07 gears? i think with the torque of a 292 3.07's would be great. if your not doing a lot of heavy towing in hilly areas __________________ common sense isn't so common anymore

11-03-2007, 02:16 AM	#4
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,672	Re: anyone running 6cy and 3.07 gears? I tried 3.08's with my 250 and I really didn't like it- and don't recommend it for 250's especially if you actually work the truck. However, if your 292 isn't tired and worn, it may work ok with the extra cubes and torque. I think it actually might the more I think about it, as long as you aren't working the truck all the time. I had to use alot more clutch with my 250 and just hope you don't get stuck in traffic on a hill! __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

11-03-2007, 07:24 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: anyone running 6cy and 3.07 gears? Cars have 3.07s and trucks have 3.08s.They are tall far pulling off with a 3spd,which is the problem.A lower 1st will be desired.If you have a torquey 292 then it will be better.But,I just never liked the 1st gear in a 3spd for anything.The only truck I kept a 3spd in was a shortbed`68 with a 396.It rolled right out of the hole with that high 1st.I would have put a 4spd car trans in,but wanted it kept original. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-03-2007, 09:26 AM	#6
chris71 Registered User Join Date: Oct 2007 Location: Sykesville MD Posts: 357	Re: anyone running 6cy and 3.07 gears? i had a 250 with 3.73's, i agree with the other guys, 3.73's good for off the line and around town, but on the highway not so good, i have 28" tires (not huge) and felt like the motor was topping out at like 65 mph. something to think about if you do a lot of highway driving or want to go 80. __________________ '55 3100 2nd series short-bed stepside '70 Corvette coupe stingray '71 Chevelle 2-dr coupe SS clone '71 C10 long-bed fleetside '83 long-haired brunette wife

11-03-2007, 11:58 AM	#9
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: anyone running 6cy and 3.07 gears? I ran a 292 in my truck for a good while with the 3.08 gear. The 292 pulled it just fine without complaint. The 350 in it now doesn't pull much better as a matter of fact. Don't underestimate the 292's torque. __________________ I'm on the Instagram- @Gearhead_Kevin

11-03-2007, 12:47 PM	#10
BWisdom New Member Join Date: Aug 2006 Location: Kansas Posts: 10	Re: anyone running 6cy and 3.07 gears? I have a granny 4-spd with 292. I am thinking of installing a caddy rearend, disk brake with large 5-bolt pattern (like the half-tons) & correct width. The gear ratio is 2.32. How do you think this combo will work...granny is very low for the 4.11 rear now in the truck but seems like the 2.32 take-off should work...what are your thoughts? Last edited by BWisdom; 11-03-2007 at 12:48 PM.

11-03-2007, 01:10 PM	#12
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: anyone running 6cy and 3.07 gears? The 82 I had was a 250 with T350 and 2.75 rear. Off the line not great, but as a daily runner, in town and freeway, it held its own. Just don't expect it to pull a house off the line or go much above 70 on anthing other than flatland. BTW, it did not help MPG with it being that high a gear either. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

11-03-2007, 01:50 PM	#14
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: anyone running 6cy and 3.07 gears? what about a 292, sm465 and 3.08 gears, 28" tires combo. think this is good for a work truck? __________________ I BELIEVE IN JOHN 3:16

11-03-2007, 01:11 PM	#16
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: anyone running 6cy and 3.07 gears? Your truck would probably be "weak" from the time you shift to 3rd until about 60mph when the rpms get back to 16-1700. Assuming a 29 inch tire. 2.32 is too high for a truck with large tires and weighs 3500-4000 lbs. That's my opinion. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 11-03-2007 at 01:12 PM.

11-03-2007, 06:18 PM	#17
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: anyone running 6cy and 3.07 gears? yes thats what i,am saying. with the 3.08 r&p gear it is had to pull out loaded so if you have the super low 1st. gear in the sm465 then all should be good right ? __________________ I BELIEVE IN JOHN 3:16



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