need help choosing transmission - The 1947 - Present Chevrolet & GMC Truck Message Board Network

big10ratrod77 · 06-01-2011, 07:34 AM

hey guys I’m trying to figure out what transmission I want to run in my 79, right now it is a 250 with a 3 on the tree and 3.08's and it has no power off the line whatsoever, dad had mentioned going to a 4 speed with a lower first gear (not a granny gear more like a car 4 speed), but I cant decide cause I want to be able to keep the cruzing rpms good on the highway. I plan on building a 250 with like 200-225 horsepower I want to try to keep it where I could get decent mileage because when it’s done I might want to go on some cross country trips or something like that.
Here is what has been running through my mind
Either a...
leave it stock
3 speed in the floor
4 speed with 3.08's
4 speed with 3.42's
T-5 with 3.73's

But I cant figure out what I’m going to do for now so if yall could give me any input it would be well appreciated, and bring up eny transmission options ive overlooked thanks guys

View Poll Results: what transmission/gear ratio should i run
3 on the tree	0	0%
3 speed in the floor	0	0%
4 speed with 3.08's	4	19.05%
4 speed with 3.42's	4	19.05%
T-5 with 3.73's	13	61.90%
Voters: 21. You may not vote on this poll

06-01-2011, 07:34 AM	#1
big10ratrod77 Registered User Join Date: Aug 2009 Location: hillborough nc Posts: 410	need help choosing transmission hey guys I’m trying to figure out what transmission I want to run in my 79, right now it is a 250 with a 3 on the tree and 3.08's and it has no power off the line whatsoever, dad had mentioned going to a 4 speed with a lower first gear (not a granny gear more like a car 4 speed), but I cant decide cause I want to be able to keep the cruzing rpms good on the highway. I plan on building a 250 with like 200-225 horsepower I want to try to keep it where I could get decent mileage because when it’s done I might want to go on some cross country trips or something like that. Here is what has been running through my mind Either a... leave it stock 3 speed in the floor 4 speed with 3.08's 4 speed with 3.42's T-5 with 3.73's But I cant figure out what I’m going to do for now so if yall could give me any input it would be well appreciated, and bring up eny transmission options ive overlooked thanks guys __________________ 77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin 79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s 81 mercedes 300d 25 MPG 77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded" 73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091 '77 chevy trucks. built to stay tough. life is short build a hot rod Last edited by big10ratrod77; 06-01-2011 at 07:39 AM.

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