Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: BlackYJ on April 16, 2007, 12:36:16 PM

Title: 297s vs 760s
Post by: BlackYJ on April 16, 2007, 12:36:16 PM

Well I am looking to get some new u-joints for my front axle and I am tore between the 297s and the 760s.  Now here are my thoughts

First - 95 YJ with 4.0L and 33s, disco passenger axle

-The 760s are a stronger joint and therefore should last longer and be more resilient to breakage
-However if I go with the 760s do I then make the axle the weak link in a breakage situation.  I would rather break a joint than an axle
-I am still running the stock 297 joints now, and my YJ has 165,000 km on it, so do I really need the upgrade.
-Finally they are the same price, so that is a wash

Let me know your thoughts

Title: 297s vs 760s
Post by: calltrex on April 16, 2007, 10:50:25 PM

Get the Alloy x joints

better then 760s and have bigger needle bearings and are greaseable but not the expense of CTMs

Title: 297s vs 760s
Post by: BlackYJ on April 17, 2007, 07:08:30 AM

Quote from: "calltrex"

are greaseable but not the expense of CTMs

I don't like greaseable and I have never had a problem with Spicers.  The Spicer triple seal joints do not let any crap in.

Title: 297s vs 760s
Post by: calltrex on April 17, 2007, 07:22:36 AM

but the smaller needle bearings could crush and fail the joint


if u dont got chromos then dont worry about it

Title: 297s vs 760s
Post by: BlackYJ on April 17, 2007, 08:13:30 AM

Quote from: "calltrex"

but the smaller needle bearings could crush and fail the joint

Well I am still on the factory joints so I think the standard design will be fine and I don't have chromos.

After some searching, it does not look like the 760s are that much stronger so I will probably land up going them those.

Title: 297s vs 760s
Post by: calltrex on April 19, 2007, 09:54:43 PM

297x is cast
760x is cold rolled steel stamped out

297x has grease channels that run almost the whole way
760x has grease channels that run only 2/3 the way

297x has slightly larger body
760x has better seals to keep dust/mud/grime out

Both have the same max (garunteed) load rating

Spicer said that in reality the 760x was slightly stronger.

Title: 297s vs 760s
Post by: Rookie on April 20, 2007, 12:57:54 AM

Scott 9 X outta 10 if the joint lets go it will take the ears on the shaft out anyway

Title: 297s vs 760s
Post by: BlackYJ on April 20, 2007, 07:26:05 AM

Quote from: "Rookie"

Scott 9 X outta 10 if the joint lets go it will take the ears on the shaft out anyway

Yeah that is what someone mentioned on the ECO and I know it is usually true

Thanks for the info Dave

Title: 297s vs 760s
Post by: calltrex on April 23, 2007, 09:10:27 PM

I just changed my front axle u-joints tonight because i had no idea on their condition or how long they have been in.

half of the caps were rusty and dry.  Cant have that when i goto moab in 2 weeks.


I put 760s in until my good ujoints get here.