Forums
New posts
Search forums
Image search
Shop
Amazon Store
T-Shirts
Stickers
Members
Current visitors
Supporting Member Upgrade
Sponsors
About
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Image search
Search
Search titles only
By:
Search titles only
By:
Menu
Install the app
Install
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Jeep Wrangler YJ
YJ Build Threads & Member's Rides
The Diesel Jeep Build
Reply to thread
Message
<blockquote data-quote="RangerRick" data-source="post: 428770" data-attributes="member: 19360"><p>FB on the D489 there [USER=19255]@jeepjoe43[/USER] . Good choice for your powertrain.</p><p></p><p> FWIW: If it were me, I would probably stick with the 27 spline shafts in the D30 up front <strong><em>For trail spares and swapping reasons mainly, </em></strong>but upgrade them to Chromolly premiums and either RCV's or CTM type joints. Then carry factory stockers ( but a 1-piece passenger side kit) as spares on very difficult trails instead of going to 30 splines. This way you can use <strong><em>any of yours or your buddies TJ, XJ or YJ shafts as emergency spares up front. </em></strong>It's not likely the spline section that will break up front but the ears on either the stubs, short or long side shafts that let go first. It starts when the ears stretch a little from stress in full lock turns just enough to spit out the cap because they are loose. Then comes the breakage because of the slop and as the two parts smash against each other, one of the ears will most likely get mangled or break off. Again, with a 2.5L motor, you're not likely to bust the R & P unless serious preload, or the crush sleeve or something else goes wrong in there and you drop a pinion. That causes teeth to chip or break off, major gouges in the carrier from the pinion head or ring bolts to sheer off. However, it's going to be the ears almost every time that take the damage with the U joint. <strong><em>That</em></strong> will be the weak link fuse first.</p><p> </p><p></p><p>RR</p></blockquote><p></p>
[QUOTE="RangerRick, post: 428770, member: 19360"] FB on the D489 there [USER=19255]@jeepjoe43[/USER] . Good choice for your powertrain. FWIW: If it were me, I would probably stick with the 27 spline shafts in the D30 up front [B][I]For trail spares and swapping reasons mainly, [/I][/B]but upgrade them to Chromolly premiums and either RCV's or CTM type joints. Then carry factory stockers ( but a 1-piece passenger side kit) as spares on very difficult trails instead of going to 30 splines. This way you can use [B][I]any of yours or your buddies TJ, XJ or YJ shafts as emergency spares up front. [/I][/B]It's not likely the spline section that will break up front but the ears on either the stubs, short or long side shafts that let go first. It starts when the ears stretch a little from stress in full lock turns just enough to spit out the cap because they are loose. Then comes the breakage because of the slop and as the two parts smash against each other, one of the ears will most likely get mangled or break off. Again, with a 2.5L motor, you're not likely to bust the R & P unless serious preload, or the crush sleeve or something else goes wrong in there and you drop a pinion. That causes teeth to chip or break off, major gouges in the carrier from the pinion head or ring bolts to sheer off. However, it's going to be the ears almost every time that take the damage with the U joint. [B][I]That[/I][/B] will be the weak link fuse first. RR [/QUOTE]
Verification
Post reply
Forums
Jeep Wrangler YJ
YJ Build Threads & Member's Rides
The Diesel Jeep Build
Top
Bottom