Have you done a 4.0 Engine Swap? - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Have you done a 4.0 Engine Swap?

Jeep Wrangler Bushwacker Flat Fender Flare Sale at BaselinIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed LineIncome tax season is upon us. We got what u need

Unread 05-21-2001, 12:21 PM   #1
Registered User
Join Date: May 2001
Location: KY
Posts: 3
Have you done a 4.0 Engine Swap?

My 88 Wrangler has a worn out 258 six w/5 speed. Rather than rebuild and continue with carb and emission system woes I am thinking about a later model engine. Will the 4.0 six bolt in, and what problems will I have? What year engine should I look for? What components outside the engine (computer etc) do I need to make sure are included with the engine purchase? I have the weak transmission and have some transfer case woes, so what about bolting in the entire package... engine, transmission, and transfer case? Will the driveshafts connect without modification?

'88 Wrangler
KyJeeper is offline   Reply With Quote Quick reply to this message
Unread 05-24-2001, 02:48 PM   #2
Registered User
1987 YJ Wrangler 
Join Date: Mar 2001
Location: Eastern Shore of Md
Posts: 1,382
Yes we have. You have mail . . .
'87 YJ- - D44's, 8" SOA , 5.38's, Locked f/r, 36" IROK's and a bottle opener...
clicky-->Maryland Wheeling spots
clicky-->Maryland OHV Trails Info
HUBDEEP is offline   Reply With Quote Quick reply to this message
Unread 07-04-2001, 09:44 AM   #3
Registered User
Join Date: Mar 2001
Location: Detroit, MI USA
Posts: 3
So this can be done, correct? What else would be needed to convert 258 w/auto to a newer 4.0 FI with auto?
2000 XJ 0 miles, Husky liners.
linuxrick is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail 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

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.