« Reply #91 on: November 12, 2012, 04:25:13 PM »
Yes, that is true. The Grand Cherokee's do not have the same transfer case. They use the NP249 until it was made obsolete by the NP247. The 249 viscous coupler is a welded assembly about 4 inches tall and 6 inches in diameter that directly connects the front input shaft to the rear output shaft. Without it present or with it burned out the car won't move.
The 229, 119, and 129 transfer cases all share a different design. The viscous coupler forms a donut around an open differential. They suck because they rely on a single O-ring to retain their fluid and they do not last as long as the 249 viscous coupler. They are awesome in the sense that once your viscous coupler fails the open differential still connects the rear output in exactly the same fashion most all wheel drive transfer cases operate.
« Last Edit: November 12, 2012, 04:27:11 PM by captspillane »
Logged
Currently Inspected and Insured as of Jan 2013:
-1985 Eagle Station Wagon 258 T5 Stickshift
-1980 Eagle Station Wagon 258 Auto Fuel-injected with GM TBI
Minor Repairs Underway:
-1982 Eagle SX4 258 T5
-1981 Kammback 2.5L Iron Duke T5
Restoration Efforts Near Completion:
-1982 SX4- 401 NV3550
-1983 SX4- 4.5 MPI NSG370 (6 Speed)
Restoration Efforts Underway:
-1985 SW- 4.0 MPI AX15
-1982 SX4- 4.0 AW4
-1981 SX4- SD33T NV4500 (Turbodiesel 5 speed)
Future Rescue Efforts- '85 Maroon SW, '87 Limited SW, '84 Limited SW, '87 4 door Sedan, '81 2 door Sedan, '88 White SW, '77 4 door Hornet, '74 2 door Hornet, '79 Spirit AMX, '81 Kammback.
RIP- Red '81 SX4, '84 4dr Sedan, '84 SW, '81 SW, '80 Spirit, '83 SW, '83 4dr Sedan
Topic: Where can I buy new viscous coupling for transfer case? (Read 56245 times)