What can be said about the 4-speed New Process NV833 overdrive manual transmission?

[hatzie]

Originally Posted by Dazzoman

SO you are saying my NP440 should do the trick .Is it the same as the A833 ? My truck is an 3/4 ton chassis and is rated at an 1 ton has an fleetside bed .I am running 16 inch 8 lug rims ( I got from an 1982 3/4 ton chevy) , converted them to the old 1961 snap ring fingers to hold the inny style hubcaps - so cool !
I remember my 66 Spicer rear had 411's in it originally and put in 354 ring gear. you said 411 is higher geared but my experiance is different here .

The NP440 is another name for the aluminum case A833 and maybe all of them. MY6 & MM7 are the GM RPO codes.

4.11:1 is a shorter or lower ratio than 3.54:1. Use lower gears to shift the RPMs up and Higher gears to shift the RPMs down. You can also change your tire diameter... larger is the same as shorter or lower gears.

Nothing wrong with getting rid of the split rims. 245\75AT16 [30.5"] tires? I have 265\75AT16 [31.65"] on my 76.

I would shoot for 4.11 or even better 4.56 gears with 31.6" tires. You'll be able to take off without lugging the engine and still have a decent overdrive engine speed. Very similar to the NV4500 without Low gear.

Plug 4.11 & 245\75AT16 into the spreadsheet. @2,300RPM at 70mph & 700 RPM at 5mph.
Plug 4.56 & 245\75AT16 into the spreadsheet. @2,600RPM at 70mph & @800 RPM at 5mph.

Plug 4.11 & 265\75AT16 into the spreadsheet. @2,200RPM at 70mph & 675 RPM at 5mph.
Plug 4.56 & 265\75AT16 into the spreadsheet. @2,475RPM at 70mph & 750 RPM at 5mph.