Narrow Axle vs Stock

[N2TRUX]

I have seen several threads recently asking about narrowing rear axles, or stock rear axles that are narrower than the original ones that came with our trucks. I plan on linking some of those threads here as well as compiling information from you guys. This will give us a reference thread for future use.

Are there any known good conversions that will fit under our trucks? Camaro, Impala, or ???

60-66
width-?

67-70
width-?

71-72
width-?

73-87
width-?

88-98
width-?

Narrower rearend- LINK

Chevy 10 Bolt Diff w/22x11 rears- LINK

anybody running 20x15 rear wheels..LINK

Cutting rear end- LINK

Pro stock wheels or not- LINK

[lolife99]

Ken,... just to clarify,... I assume your want drum to drum measurements?
(or wheel mounting point to wheel mounting point)

I use backing plate to backing plate, because it's easier to check with a vehicle setting on the ground with wheels on it. (maybe not as accurate)

[SCOTI]

Originally Posted by lolife99

Ken,... just to clarify,... I assume your want drum to drum measurements?
(or wheel mounting point to wheel mounting point)

I use backing plate to backing plate, because it's easier to check with a vehicle setting on the ground with wheels on it. (maybe not as accurate)

The 'backing plate to backing plate' method is more common. Unfortunately, it's also more confusing when being measured by different individuals.

Are they trying stretch the tape from side to side & including the mild bend in their dimension? One guy might while another doesn't. Or, are they measuring as far a possible in a straight line, making a reference 'tick' mark, & adding it all up?

What brakes does the possible swap candidate rear have? They make a difference when determining how much 'narrower' you need the overall length to be for exact placement of the wheel/tire combo within the body.

[N2TRUX]

Originally Posted by lolife99

Ken,... just to clarify,... I assume your want drum to drum measurements?
(or wheel mounting point to wheel mounting point)

I never thought about that. I suppose the factory listed width would be a good starting point. I assume that would be wheel mounting point to wheel mounting point.

I have been trying to get caught up from my vacation and haven't been on much. I will try o spend time on this later this week.

[Hottrucks]

any chance you could add the lug measurements and quanity of lugs

I have been pondering this myself ??? I have a 70 which really throws me for a loop....I want the narrow one for obvious reasons...

[SCOTI]

Originally Posted by Hottrucks

any chance you could add the lug measurements and quanity of lugs

I have been pondering this myself ??? I have a 70 which really throws me for a loop....I want the narrow one for obvious reasons...

You can measure from the axle flange (adjacent to the backing plate) to the center-line of the truck arm u-bolt to figure out which one you have (wider or shorter version).

[Hart_Rod]

In....
60-70 (early): 62"
70 (late)-72: 63.5"

http://quickperformance.com/Technica...us_measure.htm

http://www.carnut.com/specs/rear.html

http://www.chevytrucks.org/tech/rear_ends.htm

http://www.chuckschevytruckpages.com/models.html

http://www.layitlow.com/forums/lofiv...p?t509437.html

http://en.wikipedia.org/wiki/Chevrolet_C/K

[SCOTI]

Originally Posted by Hart_Rod

In....
60-70 (early): 62"
70 (late)-72: 63.5"

The late 70 - 72 housing is the same width as a 73-87 housing.

[Hottrucks]

Do you happen to know what those #'s are???

I have 7 1/4 to the top of the U bolt hanger

and 58 1/2 flange to flange measurein over the cover

I think these are the #'s everyone is looking for???