A couple questions on engine swap. opinions needed. - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-15-2011, 11:23 AM   #1
Join Date: Nov 2010
Posts: 13
A couple questions on engine swap. opinions needed.

Hi everyone. I have an 88 wrangler and am wanting to upgrade from the dinky 2.5L that's in it to a 4.0L or possibly a 4.3l from an s10. Which of these would be the better idea? Would either require changes to the driveline? What would be the minimum needed to PROPERLY do either install and not have issues later on? Just tying to do my home work. Haven't gotten much results after searching.

88Renegade is offline   Quote Quick Reply
Old 06-15-2011, 11:28 AM   #2
Sponsoring Vendor
Ibuildembig's Avatar
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,354
Everything you do is gonna require drivetrain changes, and on the smallest scale still a transmission and transfercase.

Money for money, a V8 swap is the most economical and will get as good or better mileage. But, that only goes if your in a state that allows it.

Ibuildembig is offline   Quote Quick Reply
Old 06-15-2011, 12:53 PM   #3
Join Date: Apr 2011
Location: Lethbridge AB.
Posts: 56
I have the same problem with my 94. Subscribed
TJ 4L, 2003, Back in Black
Xeno is offline   Quote Quick Reply
Old 06-15-2011, 07:52 PM   #4
Join Date: Nov 2010
Posts: 13
I know I could do a carbed 350 swap, but has anyone done or put thought into a later model Vortec swap? If its feasible, I may just get two and do the jeep and truck at the same time. the main reason I was looking at the 4.3 is because I have access to alot of parts from s10s including zr2 trannys, axles, and t-cases. if I did the 4.3, I would probably upgrade to zr2 axles (disc front and rear brakes and 4.10 gears with lockers) and the t-case and just have new drivshafts made.
88Renegade is offline   Quote Quick Reply
Old 06-15-2011, 08:38 PM   #5
liv2ride41's Avatar
Join Date: Mar 2011
Posts: 28
Well I have a efi 5.2 out of a 98 jeep grand Cherokee. Prob with doing most swaps is, you have to watch which side the front drive line comes off of the transfer case. Most chevy's have a pass side front drive line where as ford and most dodge trucks have it on the driver side. Not all but most.
liv2ride41 is offline   Quote Quick Reply
Old 06-15-2011, 09:16 PM   #6
rykemc's Avatar
Join Date: May 2011
Location: Lubbock Texas
Posts: 1,220
The thing with the 4.3 is, it is basically a V8 with two cylinders cut off. What I mean is that the V8 transmission is the same for a 4.3 as it is for a 305/350 other than the torque convertor having a different stall. And even with that most people can not tell the difference. So if you have access to the 4.3, I say go for it.
rykemc is offline   Quote Quick Reply
Old 06-16-2011, 05:51 AM   #7
Join Date: Nov 2010
Posts: 13
with mild wheeling in mind, how would my stock axles stand up to the 4.3? (until I can upgrade)
88Renegade is offline   Quote Quick Reply
Old 06-16-2011, 06:52 AM   #8
jakec's Avatar
Join Date: Jan 2011
Location: Cantonment, Fla
Posts: 189
changing to zr2 axles is not an upgrade. hell the front is independent. if your running 33s or smaller the axles should be fine with a 4.3.

jakec is offline   Quote Quick Reply

Quick Reply

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Posting Rules
You may post new threads
You may 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
2000 4.0 engine swap Adonis TJ General Discussion Forum 5 04-07-2011 07:49 PM
engine swap louie72 YJ Tech Forum 1 03-28-2011 05:43 PM
4 Cyl. to 8 Cyl. Engine Swap WhiteJeep93 YJ Tech Forum 43 08-21-2010 05:40 AM
oil pump or engine swap? AZJEEPIN TJ Tech Forum 6 07-10-2010 03:18 PM
engine swap help & advice... Jaydogg25 YJ General Discussion Forum 3 11-06-2009 02:58 PM

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 01:11 AM.

Jeep, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC