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Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > upgrading 2.5L to 4.0L

BDS 4-1/2" Suspension Lift Kit - Jeep Wrangler YJRuffstuff 10 year saleRough Country Lift Kits and Parts!

Unread 12-22-2001, 12:20 PM   #1
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Join Date: Dec 2001
Posts: 2
upgrading 2.5L to 4.0L

I have a manual 95 wrangler. The four cylinder is ruined and i'm relacing it with a 6 cylinder. Can someone please inform me if I will have to replace the engine control module in the jeep since the engine I have is an automatic. Also will I come across any other problems that I should know about. All your help will be helpful. Thx

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Unread 12-23-2001, 04:45 PM   #2
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2005 TJ Wrangler 
Join Date: Oct 2001
Location: Alabama
Posts: 165
Here is a good article about installing a 4.0 in a 2.5 Wrangler. web page
"If It Aint Broke, Fix It Till It Is!!!!!"
05 TJ Rubicon, 4.0L, 6 Speed.
07 Ram 1500 Quad Cab
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