Not quite right. The NP128 was '86 (with a few before and after) and it had an open carrier (non-posi). The NP119 was '81/82 and NP129 (same externally as the NP128, but with a viscous coupler instead of open carrier) A nice upgrade to NP119 (from same year FSJs) is the NP219 so you have low range for towing/serious offroading (and it has E drive as well where front and back can be locked in 4 high). NP228 and NP229 are swap ins (with locked low range and switchable 2wd to 4wd and back) for the others and minimal changes to the early ones. If you wan real serious tow strength though, the NP208AM or NP208J is 2wd, locked 4x4 and locked low range and you can also run low range in 2wd for extra pull power towing uphill at low speeds. With my '83 Eagle wagon I towed a 5 ton trailer (after the axle upgrade) and should have put a NP208 in. I probably wouldn't have killed so many 999 autos. (I was looking for a 727 when I found my first FSJ of my own. An '83 Cherokee 4 dr with dead 6 cyl. I found too much rot in the back frame of my Eagle and swapped the motor to the Jeep then got sick and cleared out all my projects till I felt better and had kids to help me. Now the kids are gone and I have 10 projects to clear out over the next 3 weeks before I start my new job) Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 From: "Daigle, Marcus P SSG MIL USA FORSCOM" <drcool.daigle@xxxxxxxxxxx> To: "AMC, Rambler, Nash, Jeep and family" <amc-list@xxxxxxxxxxxx> Subject: Re: [AMC-list] [AKO Warning - Message fails DKIM verification] IT RUNS!!! (and idles pretty dang well now) (UNCLASSIFIED) Message-ID: <7310de5369eb.4ca5d46a@xxxxxxxxxxx> Content-Type: text/plain; charset=us-ascii Classification: UNCLASSIFIED Dave, What year is your SX/4? 1981 was the only year for the SX/4 with the viscous coupling transfer case (NP119) and was a full time unit. 1981(opt) 1982/83(std) had the select drive transfer case (NP128) with an open diff transfer case. The other transfer case (NP129) was the shift on the fly transfer case with a viscous coupling and was avilible in 1984 and up. You can run your SX/4 in 2wd mode with the front driveshaft of. It'll act wierd if you put it in 4wd with the front driveshaft out. Did it with my SX/4, it acted wierd, can't explain what it did, just that it was wierd. I've read the the NP 119/219, 128/228, 129/229 are the exact same transfer cases, just without shift linkage on the eagle. They share the same parts within their groups. I had a 119 apart many years ago and it had all the internals to shift into a low gear, just not the linkage on the outside. I think AMC/Jeep had them numbered diffrently to to keep Eagle transfers seperate from Jeep transfers. It's just my opinion. Marcus _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com