73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: GUILLERMOARIAST on February 22, 2008, 07:03:56 pm

Title: change of gearbox ¿do it or not?
Post by: GUILLERMOARIAST on February 22, 2008, 07:03:56 pm

Hi people, i have a 1980 Blazer 4x4 with manual gearbox the principal and the low one, it has 31" x 10.5" tires. It gives to me 17mpg and that is too little. I use the truck only for traveling, because for daily drive i have a compact car.

Thus, my mechanic suggested me to change the principal gearbox taking one from a Dodge D500 truck with five speeds, i believe this is a Clark 2622 gearbox.

I think this change will give to my Blazer more final velocity contributing to save fuel on long trips.

What do you think?

Title: Re: change of gearbox ¿do it or not?
Post by: VeeTwin60 on February 22, 2008, 07:10:17 pm

I wish I could get even close to 17mpg  :-\

Title: Re: change of gearbox ¿do it or not?
Post by: Redneckchevy on February 22, 2008, 07:12:31 pm

I dont even see close to 17mpg with my V6 lol

Title: Re: change of gearbox ¿do it or not?
Post by: 78BBSTEPSIDE on February 22, 2008, 09:03:31 pm

What does 17 MPG feel like!!!!!!!!

Title: Re: change of gearbox ¿do it or not?
Post by: Captkaos on February 24, 2008, 03:21:51 pm

If you want a 5 speed get a NV4500 for a GM.