the good ratio (ring & pinion) for my k5

[thierryben]

Hello , I'm thierry , I'm from france and I rebuild my k5 350TBI 5L7 year 1990.

my project is to put on my K5 a 6" lift skyjacker + a bodylift of 3" and in tyres bf goodrich Krawler in 35/13.5/15 on 10x 15 rims dick cepek

it's for a off road use , and I don't know what is the good ratio (ring and pinion ) for the perfect condition in off road with this tyres ,

anyone can help me ?

and sorry because my english is not very well

[loafer]

With 35's and overdrive I would run 4.56.

[ryoken]

welcome thierry......

if the trans is an auto with OD.. minimum 4:10's, 4:56's would be much better...

you also wont need that much lift with 35's... you could get away with 4" with a little trimming... also 3 body lifts are a little problematic... I generally like to see people keep it to an inch or 2.... ORD makes a 1"

http://www.offroaddesign.com/catalog/oneinchlift.htm

maybe run just a 6" suspension... or better yet a 4", with a 1" body...

[thierryben]

Many thanks for your answer , yes the trans is auto and there is an overdrive and I have already buy and received the complet lift kit in 6" skyjacker and the bodylift 3" performance accessories ,

and you think that 4.56 is better than 4.10 ,

and what are the problems with the 3" bodylift?

what is the good ratio for the same condition than stock with this 35"

many thanks for your conseil

[SkulzNBonz]

4.56 without a doubt. The 3" body lift requires quite a bit of work to get everything set up to function as well as look right, but I cannot comment on all that entails as I did not body lift my truck.

John

[thierryben]

ok , well I hear you and I choose 4.56 for my ratio , you think with 4.56 and my 35" it's the same condition than the stock ?

, and what kind of locker do you conseil me?

I look the detroit locker , what do you think of it?

and how I identify exactly my rear axle for choose my locker , I have 10 bolt and a posi stock in , but I don't know if it's a 8.5 or 8.6 , what is the differences between

[K10 KRAWLER]

Body lifts are nice for working under your truck on transmissions, other than that I don't really like them. I feel that they Are only for looks and don't give you any added performance. it may be okay with your auto, but My friend has a 3'' lift on his 84 chevy 1/2 ton, with a manual transmission and whenever he presses in the clutch, it pushes the entire cab back. they are super hard on body mounts, his are wasted

[blazerbones]

Originally Posted by thierryben

ok , well I hear you and I choose 4.56 for my ratio , you think with 4.56 and my 35" it's the same condition than the stock ?

, and what kind of locker do you conseil me?

I look the detroit locker , what do you think of it?

and how I identify exactly my rear axle for choose my locker , I have 10 bolt and a posi stock in , but I don't know if it's a 8.5 or 8.6 , what is the differences between

Your ten bolt should be the same as shown in this chart:
http://coloradok5.com/axleguide.shtml

The Detroit locker is awesome in my opinion. Great off road.

Here's a gear ratio calculator:
http://www.4lo.com/calc/gearratio.htm

You could google your transmission gear ratios if you don't know them to put in the calculator.

I'd say 4.56 is great choice. I love the ORD body lift 1" as well... I'd definitely recommend it.

[Thunder]

Originally Posted by thierryben

ok , well I hear you and I choose 4.56 for my ratio , you think with 4.56 and my 35" it's the same condition than the stock ?

, and what kind of locker do you conseil me?

!

I look the detroit locker , what do you think of it?

and how I identify exactly my rear axle for choose my locker , I have 10 bolt and a posi stock in , but I don't know if it's a 8.5 or 8.6 , what is the differences between

Welcome to CK5 !

The detroit will be a good locker for you. I have one in my 10 bolt and like it.

If your 10 bolt is the orginal you will have a 8.5" with 30 spline axles.

The 8.6" were installed in 1999 and later GM 1/2 ton trucks/SUVs

[thierryben]

many thanks for your conseil , it's very cool to find people who can help me , because in france nobody can conseil me for my blazer K5 , it's too rare.

and yes my rear axle is the original , well , ok 4.56 ratio + a detroit locker for the rear axle

and what do you conseil me for the front axle , I have read somewhere that the detroit locker for the front axle are not recommended , is it true?

my front axle is the original on my K5 1990 ,