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Figure out My splines?

broncoman6524

broncoman6524

1/2 ton status
Joined
Oct 31, 2005
Posts
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Location
chuluota Fl
Im trying to figure out what gears i need for my axles (i think im gonna go with 4.11s) But i dont know whrether my axles have 28 or 30 splines.

From the factory it was a k5, 305/700r4, 10 bolts w/3.08

i now run a 350 soon to be 383 th400 and still 10 bolts w/3.08s

my question is would this be a good gear ratio and how do i figure out what splines i have?

thnx
 
If your rig is an 84 it will have 28 spline unless someone has changed it to 30. If you install a 400 you're losing the OD so i would say that 4.11's would be a good choice but that depends on what size tire you're running.
 
From what i've heard the 28 splines are stronger than the 30 splines in the fact that in order to increase the spline count from 28-30 the carrier was bored larger which means less material in the critical area. Doesn't matter to me anyways since i'm running 1 ton stuff under my rig but for those with stock 1/2 ton stuff they may want to know. :thumb:
 
4X4HIGH said:
From what i've heard the 28 splines are stronger than the 30 splines in the fact that in order to increase the spline count from 28-30 the carrier was bored larger which means less material in the critical area. Doesn't matter to me anyways since i'm running 1 ton stuff under my rig but for those with stock 1/2 ton stuff they may want to know. :thumb:
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ive never heard that. 30 spline is obviously a hair larger, and theoretically stronger, but your arguement is probably valid too. doesnt matter for me either, ive got a 60/14 too.
 
Masiony said:
what ever, 88, 89 they were both crappy years :D
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Hey now, I've got an '88!!! :mad:

j/k I've had my fair share of problems with it.

2 trannies and the rear axle went out, but that couldn't have had anything to do with the way I drive. :D

It is running strong now. :D

Rick
 
rick88blaze said:
Hey now, I've got an '88!!! :mad:

j/k I've had my fair share of problems with it.

2 trannies and the rear axle went out, but that couldn't have had anything to do with the way I drive. :D

It is running strong now. :D

Rick
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Cracked Heads, Every Valve Rotten, Oil Leaks, Engine Ticks

ive got an 85 K5, i would know
 
ya its an 84 and i've already got the 400 in after a month i needed a new tranny...bought it thinkin it needed a new trans pan seal... NOT :rolleyes:

So 4.11's would be good gears for a truck runnin 33 A/t and mostly sees mud and sand?
 
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