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Old 03-19-2010, 05:07 PM   #1
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Question 5.3/4L60e/NP261 Swap into my '89 XJ?

I am considering doing this within the next year. In order to meet all the California SMOG ref requirements I have to run the same transmission and transfer case from the engine donor vehicle (yes, they'll check).

So anyone done this swap using the GM/NP261 transfer case mated to a 4L60e transmission?

Thanks guys!!
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Old 03-19-2010, 08:45 PM   #2
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havent done that one. but let me know how it goes cause im a gm heavy line mechanic and know that drivetrain in and out. i was actually thinking of a similar swap. let me know if you have any questions on how to work on the drivetrain itself.
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Old 03-19-2010, 10:09 PM   #3
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talk to Frank Z
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Old 03-19-2010, 11:38 PM   #4
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double check your inspection laws before you do this-- I know ny requires that you can only put a motor in a car that was offered by the manufacturer the year your car was purchased-- for the xj,that means just a 4.0... NY typically follows CA.. so....

not trying to talk you out of it, just make sure you check.
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Old 03-19-2010, 11:48 PM   #5
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C.A.R.B. should be at the top of your list for who to call before even considering this swap.
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Old 03-20-2010, 12:30 AM   #6
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Okay guys, I guess I should of stated earlier that I already know the swap is legal, I am just wondering about driveline stuff.

Thanks for the replies though.
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Old 03-20-2010, 03:03 PM   #7
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definately will need to upgrade front / rear axles....at least Dana 44 depends on tire setup as well as driving style lol...also iirc cheve tcasae is also pass. drop
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Old 03-20-2010, 03:11 PM   #8
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No, not all of them.
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Old 03-20-2010, 03:49 PM   #9
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Quote:
Originally Posted by fishtaconc View Post
definately will need to upgrade front / rear axles....at least Dana 44 depends on tire setup as well as driving style lol...also iirc cheve tcasae is also pass. drop
According to Novak, my stock Dana 30/35 setup is fine. Although if I come across a Waggy with Dana 44's I'll grab it.

This XJ is my wife's daily-driver. It'll get a 2" lift before too long (with new rear leafs to correct any sag through the years) and maybe a set of A/T 31x9.5x15's on the stock aluminum rims. At most it'll see some weekend sand dunes and an occasional trail, nothing too serious.

The full size '87 and earlier GM/NP transfer cases are passenger drop. All the full size '88 to present are driver side drop.
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Old 03-20-2010, 10:15 PM   #10
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Quote:
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According to Novak, my stock Dana 30/35 setup is fine. Although if I come across a Waggy with Dana 44's I'll grab it.
If you drive it like a granny!! and even then if you spin one tire on take off and it catches....your done.

Dont take my word for it look on you tube for all the videos of a 4.0 snapping axles on a D35 with ease........
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Old 03-20-2010, 11:34 PM   #11
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Quote:
Originally Posted by 98 JeepJeep View Post
If you drive it like a granny!! and even then if you spin one tire on take off and it catches....your done.

Dont take my word for it look on you tube for all the videos of a 4.0 snapping axles on a D35 with ease........
What typically breaks exactly? Spider/side gears?

Thanks!!
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Old 03-21-2010, 12:05 AM   #12
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The axle shafts.

http://www.billhughes.com/dana35c/
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Old 03-21-2010, 01:32 AM   #13
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Hey Cable, I wanna help with the swap, let me know if that is ok
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Old 03-21-2010, 11:29 AM   #14
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Wink

Quote:
Originally Posted by FrankZ View Post
Pretty....

Quote:
Originally Posted by TheBigDogg View Post
Hey Cable, I wanna help with the swap, let me know if that is ok
I'll be honest, I am prob at least a year away from the physical swap in my XJ. I'll start collecting parts before then, but I am usually slow with my own projects because I wait for the uber good deals to come along before spending any cash (no whipping out the ol' credit card either). But when the time comes, I welcome the help since I've never done a LSx swap into a XJ.

I do LSx swaps all the time for customers, usually you'll find 2-3 LSx motors and transmissions in my place at any given time.

Right now I have 3 LSx/4L60e swaps lined up for different customers, the current being a 5.3/4L60e into a '67 Camaro. The motor is getting a cam/springs/pushrod/oil pan swap prior to installation and the PCM/harness is being reworked for stand-alone operation. I am just waiting on the customer to get his cam from Summit before I start. After all the engine work is completed, I'll have the customer bring me the car and the swap done in the car and running within a weekend.

If you like, you are more than welcome to come and check it out.

661-565-2866
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Old 03-21-2010, 12:16 PM   #15
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cool, do you have access to getting LSx engines? if so, PM me on my forum with the info, I know others interested, my bro has a 83 chevy PU and is thinking about the swap
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