Drivetrain strength - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum

Join Wrangler Forum Today


Like Tree2Likes
  • 2 Post By fiend
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 01-25-2020, 11:09 PM
Thread Starter
  #1
Newb
 
Join Date: Jan 2020
Location: Sydney, Australia
Posts: 8
Drivetrain strength

I'm looking to maybe do an engine swap on a JK (not LS or Hemi) and want to know what kind of power/torque limits the stock JK components will hold up to and what upgrade options there are if I want to exceed those limits. Combo I'm looking at will make 500hp at the wheel with a few simple mods in the car it comes from so I expect it will be reduced by the time you factor bigger tyres etc in the Jeep but it will still be a healthy output. I'm known to be hard on cars so if retaining the stock components means babying the car then just list the parts that need upgrading

AusJeepNoob is offline   Quote
Old 01-25-2020, 11:13 PM   #2
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 7,149
HP means nothing give us your expected torque output and we can figure it out.

__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is offline   Quote
Old 01-26-2020, 12:03 AM
Thread Starter
  #3
Newb
 
Join Date: Jan 2020
Location: Sydney, Australia
Posts: 8
Around 500 lb/ft
AusJeepNoob is offline   Quote
Sponsored Links
Advertisement
 
Old 01-26-2020, 12:20 AM   #4
Jeeper
 
fiend's Avatar
 
Join Date: Jul 2017
Location: SoCal
Posts: 401
They put Dana 44s in corvettes and other high HP cars. The difference is they have a gear ratio in the low 3s and tires that are maybe 25 inches in diameter, as compared to a Jeep gear ratio in the high 4s or low 5s and 35 or 37 inche tires.

With the HP and torque you’re talking about, you need 60s or a 14 bolt or a Sterling 10.5.
fiend is offline   Quote
Old 01-28-2020, 06:43 AM
Thread Starter
  #5
Newb
 
Join Date: Jan 2020
Location: Sydney, Australia
Posts: 8
Quote:
Originally Posted by fiend View Post
They put Dana 44s in corvettes and other high HP cars. The difference is they have a gear ratio in the low 3s and tires that are maybe 25 inches in diameter, as compared to a Jeep gear ratio in the high 4s or low 5s and 35 or 37 inche tires.

With the HP and torque you’re talking about, you need 60s or a 14 bolt or a Sterling 10.5.
Thanks. Now to figure out the best option.
AusJeepNoob is offline   Quote
Old 01-28-2020, 07:01 AM   #6
Jeeper
 
MoabCarl's Avatar
 
Join Date: Jan 2019
Location: Metro Detroit MI
Posts: 728
My LS3 - 430HP/400+ FLbs Torque easily broke upgraded Dana 30/44 combo and I was spending about 2k each year on fixing. Ever since going with Dynatrac HardCore 60/60 package I have not had any issues. With the power you are looking at I would recommend nothing less than 60s. The Dynatrac 60/80 package is what I recommend.
__________________

Red Rock 4-Wheelers EJS Trail Gunner
2001 TJ 4.0 Auto
2007 JKU LS3, PR60s, too much to list....
2012 JKUR bone stock
2018 Tacoma TRD Off-Road
MoabCarl is offline   Quote
Old 01-28-2020, 08:51 AM   #7
Jeeper
 
Leadnut's Avatar
 
Join Date: Mar 2016
Location: Arizona
Posts: 4,462
Quote:
Originally Posted by MoabCarl View Post
My LS3 - 430HP/400+ FLbs Torque easily broke upgraded Dana 30/44 combo and I was spending about 2k each year on fixing. Ever since going with Dynatrac HardCore 60/60 package I have not had any issues. With the power you are looking at I would recommend nothing less than 60s. The Dynatrac 60/80 package is what I recommend.

Is the 60/80 necessary for the LS3 do you think? It’s $18.5K vs. $13K for the Hardcore 60/60. Just wondering because I have the 60/60 and some day may want to go to an LS3.
__________________
2014 JKU Willys 6-spd, RK X-Factor 3.5", Fox Resis, KM3 37s, PR60s, Eaton e-lockers, 5.13, Atlas II 3.8, and another $10K in miscellaneous parts.
Leadnut is online now   Quote
Old 01-28-2020, 04:56 PM   #8
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 7,149
Quote:
Originally Posted by Leadnut View Post
Is the 60/80 necessary for the LS3 do you think? It’s $18.5K vs. $13K for the Hardcore 60/60. Just wondering because I have the 60/60 and some day may want to go to an LS3.
I don't know if the 60/80 package is really needed or not but from what I have seen from Motech with the LS3 and 4.10 gears you can spin all 4 tires on demand. If or when I get to put an L86 I will jump to Currie 60's for sure maybe the 60 extremes.
__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is offline   Quote
Old 01-28-2020, 05:12 PM   #9
Jeeper
 
Join Date: Jun 2015
Location: So Cal
Posts: 473
I know several people with LS powered JKs on 60s, and none have broken anything axle related. One is pretty heavy on the throttle, and still no axle problems. Unless you are REALLY hard on your rig, I don’t think the 60/80 package is necessary.


Sent from my iPhone using Tapatalk
__________________
2017 Rhino JKUR
loud0g40oz is online now   Quote
Old 01-29-2020, 01:21 PM   #10
Jeeper
 
MoabCarl's Avatar
 
Join Date: Jan 2019
Location: Metro Detroit MI
Posts: 728
Quote:
Originally Posted by Leadnut View Post
Is the 60/80 necessary for the LS3 do you think? It’s $18.5K vs. $13K for the Hardcore 60/60. Just wondering because I have the 60/60 and some day may want to go to an LS3.
The 60/80 is not necessary for the LS3. The 60/60 works just fine with the LS3 HP and torque.
__________________

Red Rock 4-Wheelers EJS Trail Gunner
2001 TJ 4.0 Auto
2007 JKU LS3, PR60s, too much to list....
2012 JKUR bone stock
2018 Tacoma TRD Off-Road
MoabCarl is offline   Quote
Old 02-01-2020, 07:17 AM
Thread Starter
  #11
Newb
 
Join Date: Jan 2020
Location: Sydney, Australia
Posts: 8
What about things like G2 or Alloy USA 35 spline or is it more the ring and pinion that is the issue? I plan on running 315/70R17 so figure I'll have to regear so can do the 35 spline at the same time. I will wait till after the engine conversion is done to see where it cruises on the highway to match the gearing to the torque curve.

AusJeepNoob is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 01:07 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.