@Longhorn84 sorry for derailing your thread.
@04TeeJay it's better to start your own thread. And yes, those are factory cats.
@04TeeJay it's better to start your own thread. And yes, those are factory cats.
1998 Jeep TJ 2.5 automatic to 5.3 4L60E swap complete
- Thread starter Aaron Paul
- Start date
OP
I ran Camaro SS manifolds. 2.5" each side to a y pipe. 3" from y pipe to single cat to dynaflow muffler. 3 inch out the rear. I am only running upstream cats and have downstream programmed out. Use the existing rear TJ tailpipe as a template for your new one. Front is all heat wrapped to y pipe as it is close to oil pan.
OP
Yes, stock computer still uses the 1st plug. Left one when looking head-on. I would have to pull the wiring diagram, but there are some wires there that I wanted to retain, airbag, etc.
Looking at the wiring the airbag has two sets of wiring one for the can bus to computer and one for actuation.
My head is going to explode with this wiring stuff. Can you do me a favor and unplug the last plug from the computer and see is your jeep still starts and runs?
OP
It will start and run. My motor is independent and has a stand-alone harness. I could start it on an engine stand if I needed to. If you want to go through the wiring, message me your # and I will try and call this weekend to talk through it. We could do zoom as well.
The Green Bastard
New Member
Hi there I hope you are still monitoring this site. I about to start the same swap on my 2.5 1998 and was wondering if you could send me all the info. Thanks
Wiring is a big topic. Read up on thiss. All my stock gauges work, to tie in, you will need the wiring diagram.I actually found a mechanic that specialized in wiring, he showed me, easier that it looks.
Fuel lines, replace with 6an, I used Russell fittings, a larger fuel pump, wasbro along with a 58 psi corvette regulator. The stock 2.5 pump won’t cut it, the 4.0 I hear will mostly. 5.3’s need 58 psi to run.
Gen 3 engines are cheaper to wire and mod than a Gen 4 FYI. That’s the only thing I would have like to change. Exhaust, this is custom, I am a welder so that saved me a few bucks as well as the motor mounts ( Novex are weld in, easy to mock up and direct fit )
Rear diff, your Dana 35 will work for now, but plan on upgrading to a Dana 44 or Ford 8.8/ G2 etc.
I used Novek Conversations, check out their site, lots to learn.
Not to scare anyone off, but I did mine with all new parts, little things like upgrading the Transfer case linkage to cable, so, a $8000 TJ is close to $30k and there is no way I could get 12k for it. It’s a hobby, don’t go into it with a $ figure.
A 4.0 TJ Sahara/Rubicon are great choices for an LS Swap, they come better equipped as more parts are adaptable.
i am around if you need some advise.
Good luck
Fuel lines, replace with 6an, I used Russell fittings, a larger fuel pump, wasbro along with a 58 psi corvette regulator. The stock 2.5 pump won’t cut it, the 4.0 I hear will mostly. 5.3’s need 58 psi to run.
Gen 3 engines are cheaper to wire and mod than a Gen 4 FYI. That’s the only thing I would have like to change. Exhaust, this is custom, I am a welder so that saved me a few bucks as well as the motor mounts ( Novex are weld in, easy to mock up and direct fit )
Rear diff, your Dana 35 will work for now, but plan on upgrading to a Dana 44 or Ford 8.8/ G2 etc.
I used Novek Conversations, check out their site, lots to learn.
Not to scare anyone off, but I did mine with all new parts, little things like upgrading the Transfer case linkage to cable, so, a $8000 TJ is close to $30k and there is no way I could get 12k for it. It’s a hobby, don’t go into it with a $ figure.
A 4.0 TJ Sahara/Rubicon are great choices for an LS Swap, they come better equipped as more parts are adaptable.
i am around if you need some advise.
Good luck
The Green Bastard
New Member
Invoice sheet from Novak for a 1998 Jeep TJ LS Swap, 5.3 gen 4, with 5 speed. Keep in mind that this is just the start. Doesn't include tranny as the AX5 won't work, and the cost of the motor. Wiring was another $1200, and exhaust 2 1/2 to 3 inch was close to a grand. Lots of little parts. If your Jeep has a Dana 35 in the rear, consider upgrading to a Dana 44 or 8.8. Expect to have 15k on hand to complete your ride. Hope this helps.
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The Green Bastard
New Member
Looks great. Do you recall the source/PN for the Art Carr shifter? Novak recommended a Lokar but I'm flexible. Take care!
Depending on what center console you have or plan to use will dictate how you will mount the shifter.
WOD is a good vendor to buy a Art Carr/Winters shifter from.
https://www.wideopendesign.com/winters-shifter
This is a Winters shifter installed ion a GenRight center console.
You buy the shifter based on the transmission you are going to be using, that is if they offer a kit for your transmission.