What kind of transfer case do I need for a Jeep Grand Cherokee?
I swapped a NP242 from a 1991 Jeep Cherokee (XJ) into my Jeep Grand Cherokee (ZJ) with a NP249. The goal of this swap is to have the following capabilities: 2WD, 4 Part-Time, 4 Full-Time, neutral, 4-Low.
Can a Jeep Grand Cherokee be swapped for a Jeep XJ?
This was done in my driveway, by my friends and me, your shade tree mechanics. I swapped a NP242 from a 1991 Jeep Cherokee (XJ) into my Jeep Grand Cherokee (ZJ) with a NP249. The goal of this swap is to have the following capabilities: 2WD, 4 Part-Time, 4 Full-Time, neutral, 4-Low.
How to mate and mesh a Jeep Grand Cherokee?
To make everything mate and mesh you have to remove the input gear from your NP249 and put into your NP242. Chock your wheels, chock your wheels, chock your wheels. This means, put something in front and behind your wheels to keep your Jeep from rolling and moving any direction.
How to remove rollpin from ZJ Grand Cherokee?
By the shifter there is a small rubber plug. Remove this plug and use a #1 screw type extractor to remove the low range shift fork rollpin. Tap the extractor into the end of the rollpin, and with vice grips on the extractor pull and twist in a counterclockwise direction to remove the rollpin. It may take 2 or three tries to remove the rollpin.
What kind of transfer case does a Jeep Grand Cherokee use?
NP249: Full time transfer case used exclusively in 93-98 ZJ Grand Cherokees with 4 full time and 4 low. The 249 utilizes a vicious coupler used in conjunction with the center differential found in the 242.
Is the Jeep Grand Cherokee 242 the same as the 249?
The 242 and 249 both share the same front case half, meaning you use all the parts from the 242, with the exception of the 249 input, 249 planetary set, and 249 front case half. You will need to drill an access hole for the mode fork roll pin.
Can you swap NP249 sensor in Jeep Grand Cherokee?
You do however NEED the shift tab from the transfer case you are swapping in, the long tab on the 249 will not work. The NP249 sensor WILL NOT work in the 231, as the threaded portion is about 3 times longer. I attempted to shim it to no avail.
How big is the input shaft on a Jeep Grand Cherokee?
There are 3 different input shafts, .750″, .840″, and 1.55″, as well as both 21 and 23 spline shafts. All ZJ transfer cases have a 23 spline input shaft, and all 92-01 XJ’s have a 23 spline input shaft. 91 and older XJ’s have the 21 spline input.
Is there a streetable mod for the VC in a Jeep Grand Cherokee?
Older ones used the VC in hi and lo but split 50-50. Newer ones used the VC only in hi. Lo was locked. But they biased more power to the rear until the VC kicked in. If you have the early model and want a streetable mod of the VC, then yuo could drain it (theoretically) and you would have full-time 4 hijust like the 242.
What happens when you change viscous coupling on a Jeep Grand Cherokee?
The discs become slightly “polished” which means the small imperfections are worn off. Those tiny pieces of metal end up in the fluid. That gives the fluid more “grip”. That extra grip is what causes the binding when a VC goes bad. If the fluid was changed often enough, you would have completely polished discs and nothing for the fluid to grip.
When was the Jeep NP242 transfer case introduced?
The Jeep NP242 transfer case was introduced in the 1987 model year as a replacement for the NP228. The 242 premiered in the XJ Cherokee / Wagoneer and MJ Commache as the SelecTrac option.
Older ones used the VC in hi and lo but split 50-50. Newer ones used the VC only in hi. Lo was locked. But they biased more power to the rear until the VC kicked in. If you have the early model and want a streetable mod of the VC, then yuo could drain it (theoretically) and you would have full-time 4 hijust like the 242.
When did the XJ Cherokee use the 242 transfer case?
The 242 premiered in the XJ Cherokee / Wagoneer and MJ Commache as the SelecTrac option. It was used in the 1991-1998 ZJ Grand Cherokee. The 242 persisted throughout the full run of XJ Cherokees and continued on in the 2002 KJ Liberty.
When did the new process New Venture Gear 242 come out?
New Process / New Venture Gear 242 Transfer Case. The Jeep NP242 transfer case was introduced in the 1987 model year as a replacement for the NP228. The 242 premiered in the XJ Cherokee / Wagoneer and MJ Commache as the SelecTrac option. It was used in the 1991-1998 ZJ Grand Cherokee.