Matt Posted January 17, 2014 Share Posted January 17, 2014 Please help, I am hoping somebody would know which transfer cases I can use to replace my 1986 np228 or am I better off rebuilding the one I have. while up on stand both front and back drive shafts spin but only has back spinning while on snow or ice. Link to comment Share on other sites More sharing options...
GirsMJ86 Posted January 17, 2014 Share Posted January 17, 2014 What 4x4 pattern are you shifting into? 4x4 Full Time or 4x4 Part Time? And the wording is kind of backwards IMO. Full Time means you can use it all the time, even on dry pavement, because the differential in the t-case isn't locked. Part Time means you should only use it part of the time and never on dry pavement because the diff is locked and will cause damage to the t-case. You shouldn't have a CAD in the front axle since you have Selec-trac, but I've seen them there for one reason or another. If you do have one, you'll want to lock that over and I bet it will solve your issue. Otherwise you've got something wrong with your pumpkin I'd say. 228's are sort of hard to find since they were 86 only. You could swap in a 229 which is used in selec-trac rigs after 86. You could even swap in a 231 if you don't care about full time, or a 242 if you want even newer full time. You'll need to deal with drive shaft length differences though. I believe you could even swap in the older 208s which are full time I think. Link to comment Share on other sites More sharing options...
87manche1 Posted January 17, 2014 Share Posted January 17, 2014 Just got to watch spline counts Link to comment Share on other sites More sharing options...
nitroxsteve Posted January 17, 2014 Share Posted January 17, 2014 Does your truck have the axle disconnect in the front axle? If it does that could be malfunctioning and causing you to not have 4wd. Link to comment Share on other sites More sharing options...
Blaine Posted January 17, 2014 Share Posted January 17, 2014 yea def. not ur T-case if the front drive shaft is spinning, if its a split axle in the front the CAD is not working, easy fix. If it a solid axle well then u have some problems Link to comment Share on other sites More sharing options...
Matt Posted January 17, 2014 Author Share Posted January 17, 2014 thanks guys, I do not have the CAD and in the center consul there is the vacuum 2 to 4 drive switch and the lever hi to low on the left side of consul. when up on stand the front shaft and wheels spin but while on the ground(ice) back wheels spin with nothing up front. I've been told the differential in the t'case is shot and as a side note the hi to low lever seems frozen. That is why I was leaning towards a replacement but was worried about bolt patterns and the spline count and what year the switch was made. thanks again, it's nice to have a site like this for good advise Link to comment Share on other sites More sharing options...
yxmj Posted January 17, 2014 Share Posted January 17, 2014 A 242 would be your best choice (IMHO) bolt pattern would be the same but you will have to do a spline count to make sure.....if you could find one from that era it would be a no brainer bolt in :thumbsup: Link to comment Share on other sites More sharing options...
Matt Posted January 17, 2014 Author Share Posted January 17, 2014 I think you are on to something with the 242 but don't have the 228 out yet to see the splines. will stop at salvage yard today looking for that info Link to comment Share on other sites More sharing options...
dasbulliwagen Posted January 17, 2014 Share Posted January 17, 2014 The 228 I had in my Grand Waggy blew up on me. I had it replaced with a 2o8 from the same vintage, but it never really shifted right, I think because the linkage was different. I sold it shortly after that ordeal. Just remember youll need correct linkage that goes with whatever case youll swap in. Link to comment Share on other sites More sharing options...
Matt Posted January 17, 2014 Author Share Posted January 17, 2014 Thanks again, I found a '88 with a floor shift automatic but the 4 liter vin indicates it is a part time four wheel drive I am guessing it is a 231. does anyone know if the 86 and 88 would have the same spline count? there doesn't seem to be a lot off cases out there to pick from, but I think I can get one of these for about $100 or $150 at a local salvage yard Link to comment Share on other sites More sharing options...
yxmj Posted January 17, 2014 Share Posted January 17, 2014 Thanks again, I found a '88 with a floor shift automatic but the 4 liter vin indicates it is a part time four wheel drive I am guessing it is a 231. does anyone know if the 86 and 88 would have the same spline count? there doesn't seem to be a lot off cases out there to pick from, but I think I can get one of these for about $100 or $150 at a local salvage yard The only problem in answering that question is that you would have to assume that both trucks are running all original equipment and nothing has been changed or swapped....... If that was the fact they should be 21 spline....should be Here is a link that gives some more info....http://www.quadratec.com/jeep_knowledgebase/article-42.htm *******Note what is said about the AW4 outputs********* I would also say that I know for a fact that the input shafts on 207,231,242, and 249 T-cases can be interchanged (swapped)... I have never had a 228 so can not add that to the list with 100% confidence (this would require splitting the case and installing it) Link to comment Share on other sites More sharing options...
Matt Posted January 17, 2014 Author Share Posted January 17, 2014 Thanks a ton, I think I will get the one that is available and make the changes that may be necessary. Just a little more time spent learning about the ole Comanche! Link to comment Share on other sites More sharing options...
carnuck Posted January 18, 2014 Share Posted January 18, 2014 If you were close to Seattle... I have a NP219 for $100 that is a direct swap. It doesn't have 2wd as an option but if you have a vacuum front diff, you can shift to 4 hi lock (AKA Edrive) and use a dash vacuum switch to unlock the front diff for 2wd. As for the current setup, part time 4x4 should lock front and rear driveshaft. I have a NP229 (almost the same) in my Eagle that has 2wd, 4 hi coupled (full time), neutral and 4 low lock. 4 hi doesn't lock. Another option is a Jeep (not other brand) NP208 (found in '80 to '88 Jtrucks and some of the other '80 up FSJs) but you will need a rear driveshaft about 5-6" longer. It's the same as NP231 but stronger. The 904 is 23 spline, but it's a shallow output. Link to comment Share on other sites More sharing options...
dasbulliwagen Posted January 18, 2014 Share Posted January 18, 2014 ^^^ that was my next thing to tell you, your trans is the A904, not the AW4. It might make a difference when chosing one to swap in. Link to comment Share on other sites More sharing options...
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