GEARING do i need to change and if so to what

[Cmprice]

okay i have the stock 3.50 axle gearing and i will be putting 36 in. x 12.5 tsl's

how would the 3.50 do gas mileage and power wise

also if i do need to upgrade would i want 4.56 4.88 ect?

 

[Justbust1n]

okay i have the stock 3.50 axle gearing and i will be putting 36 in. x 12.5 tsl's
how would the 3.50 do gas mileage and power wise

also if i do need to upgrade would i want 4.56 4.88 ect?

what year is your bronco? if you have the what i like to call sissor dana 44 , you have to change the carrier if you want to go 4.10 or bigger but i think if you have the 8.8 or 9 inch you dont have to ... yeah a 4.10 and up to an extent helps around town on gas but once you hit the highway , it starts guzzling i changed mine out and it was a task for the front end but the rear was easy ...i have some 36 tsl sx's i used to put on when i had my 3.55 and it did ok mudding but you can really tell a diffrenece when you change the gears

 

[Cmprice]

what year is your bronco? if you have the what i like to call sissor dana 44 , you have to change the carrier if you want to go 4.10 or bigger but i think if you have the 8.8 or 9 inch you dont have to ... yeah a 4.10 and up to an extent helps around town on gas but once you hit the highway , it starts guzzling i changed mine out and it was a task for the front end but the rear was easy ...i have some 36 tsl sx's i used to put on when i had my 3.55 and it did ok mudding but you can really tell a diffrenece when you change the gears

i have a 79 with a dana 44 front and the ford 9 in rear

 

[Justbust1n]

i have a 79 with a dana 44 front and the ford 9 in rear

yeah so you have to straight axle 44 its alot easier than a earlier model !!! but you will have to change the carrier in the dana 44 but you should be good in the rear its a little bit more of a pain than a 8.8 but you should be good it should be a week weekend job and run you around 1000.00 dollars maybe cheaper if you find some good used ring and pinions or carrier a 4.56 would be ideal for everyday driving with some 36's and thing bigger wuld be for preformance

 

[Cmprice]

yeah so you have to straight axle 44 its alot easier than a earlier model !!! but you will have to change the carrier in the dana 44 but you should be good in the rear its a little bit more of a pain than a 8.8 but you should be good it should be a week weekend job and run you around 1000.00 dollars maybe cheaper if you find some good used ring and pinions or carrier a 4.56 would be ideal for everyday driving with some 36's and thing bigger wuld be for preformance

the gears are 600 front and back and my grandpa has a friend that will do em for me free...

 

[Justbust1n]

the gears are 600 front and back and my grandpa has a friend that will do em for me free...

man some people are just lucky ... i did mine and it took all weekend , that and a couple of beers later...but it is definaltly worth it goodluck

 

[79highrider]

Since we are allready on this topic,

I am building my 79 into a good trail truck now that I picked up a newer daily driver (91 F150)

I am going for a 6" Superflex lift and I want to run my 35" tires because they are like brand new but also 37s or 38s when I need new ones The truck is going to have full lockers (Power-lock front detroit rear) and I want to re gear it, problem I am facing is most nice trails are 1h to 2h highway from me, I am dropping in a 400M and it has a C6 what gearing should I go with in the axles?

 

[Justbust1n]

here this link will help http://www.4lo.com/calc/geartable.htm

 

[79highrider]

Thanks I used that link and for my application I think 4.56's will work pretty well

 

[Cmprice]

Thanks I used that link and for my application I think 4.56's will work pretty well

ya ima go with 4:56 on my truck as well..

 

[Justbust1n]

ya ima go with 4:56 on my truck as well..

yeah i put 4.56's in mine about 2-3 months ago and its really a big diffrence! it feels like i have about 100 more hourses under the hood....

 

[ricks73eb]

i got a shorty 150 with 3:50's and 35s and she does alright... i got plenty of power... (i can smoke um pulling my trailer with my 77 bronco on it) oops sorry i just titled it as a 69 so i gota member to call it that!?!?!