Rear End compatibility question
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
Thread Starter
|
Freshman User
Joined: Mar 2006
Posts: 28
Likes: 0
Where do I measure to see? Is the 61 inches from backing plate to backing plate? or Outside to outside?
Thanks and sorry I am new to this. I have been a member for several years but just getting started with my work on the truck again.
Thanks and sorry I am new to this. I have been a member for several years but just getting started with my work on the truck again.
Hotshot
Joined: Oct 2009
Posts: 16,172
Likes: 4,772
From: Burbank, WA
In the past, people have changed the rear ends not because they were weak or troulesome, but because they didn't want to be turning such high rpm's on the highway, since the stock rears had a fairly low gear ratio, like 3.92:1, and swapping rears was the easiest way to get something more reasonable, on the lines of 3.00:1. With newer cars donating their drivetrains with overdrive automatic transmissions, like yours, it isn't so much of a concern, as shifting into overdrive does that magic for you. Personally, if I was doing your project, I would leave the rear end alone and see how it works, as is. I'm betting you'll like it just fine. It'll give you good acceleration from a stop, and allow you to cruise at a reasonable engine speed, while going 70 on the freeway. The best of both worlds. 
Laughing Gas
Joined: Aug 2006
Posts: 815
Likes: 4
From: mountaintop, Pa
In the past, people have changed the rear ends not because they were weak or troulesome, but because they didn't want to be turning such high rpm's on the highway, since the stock rears had a fairly low gear ratio, like 3.92:1, and swapping rears was the easiest way to get something more reasonable, on the lines of 3.00:1. With newer cars donating their drivetrains with overdrive automatic transmissions, like yours, it isn't so much of a concern, as shifting into overdrive does that magic for you. Personally, if I was doing your project, I would leave the rear end alone and see how it works, as is. I'm betting you'll like it just fine. It'll give you good acceleration from a stop, and allow you to cruise at a reasonable engine speed, while going 70 on the freeway. The best of both worlds.
well stated
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
In the past, people have changed the rear ends not because they were weak or troulesome, but because they didn't want to be turning such high rpm's on the highway, since the stock rears had a fairly low gear ratio, like 3.92:1, and swapping rears was the easiest way to get something more reasonable, on the lines of 3.00:1. With newer cars donating their drivetrains with overdrive automatic transmissions, like yours, it isn't so much of a concern, as shifting into overdrive does that magic for you. Personally, if I was doing your project, I would leave the rear end alone and see how it works, as is. I'm betting you'll like it just fine. It'll give you good acceleration from a stop, and allow you to cruise at a reasonable engine speed, while going 70 on the freeway. The best of both worlds.
Measure the rear end from wheel-mounting-surface to wheel-mounting-surface (drum to drum) or if you have standard offset wheels on it from the center of one tire tread to the center of the other.
Thread
Thread Starter
Forum
Replies
Last Post
