anyone running 6cy and 3.07 gears?

[davidh]

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]

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]

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]

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]

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]

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]

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]

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]

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]

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]

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]

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]

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]

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

[davidh]

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]

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]

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 ?