brubakes Posted January 4, 2012 Share Posted January 4, 2012 Did the MJ ever come from the factory with the 242 transfer case? Link to comment Share on other sites More sharing options...
Eagle Posted January 4, 2012 Share Posted January 4, 2012 Nope. Link to comment Share on other sites More sharing options...
brubakes Posted January 4, 2012 Author Share Posted January 4, 2012 Nope. Dang. I was reading another thread about what it would take to put one in. Not quite as simple as the 231/242 swap I've done in my old XJ and TJ. Link to comment Share on other sites More sharing options...
Pete M Posted January 4, 2012 Share Posted January 4, 2012 not officially, no. though at least one guy claimed someone did a special order for one. my guess is that it was probably installed at the dealership, but who knows. :dunno: Link to comment Share on other sites More sharing options...
brubakes Posted January 4, 2012 Author Share Posted January 4, 2012 not officially, no. though at least one guy claimed someone did a special order for one. my guess is that it was probably installed at the dealership, but who knows. :dunno: It's hard to get information like this from Jeep too! I had asked them about the availability of the 242 in another Jeep and their response was it wasn't information they could give me as it was a trade secret. Link to comment Share on other sites More sharing options...
Pete M Posted January 4, 2012 Share Posted January 4, 2012 there was a similar awd t-case offered in 86, but it wasn't a 242. can't remember which number it was. 229 maybe? Link to comment Share on other sites More sharing options...
Oizarod115 Posted January 4, 2012 Share Posted January 4, 2012 there shouldn't be any magic to swapping it. perhaps adjusting the shifter might be quirky? but other than that just bolt on in and ride Link to comment Share on other sites More sharing options...
mvusse Posted January 4, 2012 Share Posted January 4, 2012 Doing a 231/242 swap in a Comanche is identical to a 231/242 swap in a Cherokee and similar to a Wrangler. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 4, 2012 Share Posted January 4, 2012 I've got the t-case, shift gate, and bezel out in the shed waiting for the ambition to do it. Link to comment Share on other sites More sharing options...
Eagle Posted January 4, 2012 Share Posted January 4, 2012 there was a similar awd t-case offered in 86, but it wasn't a 242. can't remember which number it was. 229 maybe? 229. But it wasn't really similar to the 242. Link to comment Share on other sites More sharing options...
jimoshel Posted January 4, 2012 Share Posted January 4, 2012 there was a similar awd t-case offered in 86, but it wasn't a 242. can't remember which number it was. 229 maybe? 207 Link to comment Share on other sites More sharing options...
txjeeptx Posted January 4, 2012 Share Posted January 4, 2012 207 isnt an AWD case. Its part time 4wd with a low range, for off-pavement use only when in 4wd. No differential, which the 242 has. The 229 is a full size Jeep t-case, AWD with a 2wd mode and a low range. It uses a viscous coupling rather than an open diff, which the 242 has. The ZJ 249 uses a viscous coupling, but has no 2wd mode - it is full time AWD. 242 has 2wd mode, AWD high range for pavement, 4wd high locked mode for off road, and a low range. If you want to swap in a 242, you need the shifter from the donor XJ that is gated for the 242's shift pattern. There is some arguing about it, but generally, any t-case with a viscous coupler(229,249) tends to outperform one with a open center differential(228,242) in snow. Link to comment Share on other sites More sharing options...
Pete M Posted January 4, 2012 Share Posted January 4, 2012 228 then? whatever it was, 86 had the option for a t-case that had 2wd, 4wd, awd, and low range. wish I had bought my brochures with me. :( Link to comment Share on other sites More sharing options...
jimoshel Posted January 4, 2012 Share Posted January 4, 2012 According to the 1986 FSM there was the 207 and 228 transfer cases. According to my 1986 owners manual the '86 had selectrac and command trac. I feel that this proves beyond any doubt that there was a factory service manual and a owners manual for 1986 Jeeps. Link to comment Share on other sites More sharing options...
txjeeptx Posted January 5, 2012 Share Posted January 5, 2012 The 228 is the same case as the 229, only the 228 has a open center differential like the 242, while the 229 has the viscous coupler. I thought the 228 was only a FSJ case, but if there was an option for Selectrac in XJs in 86, and the 242 wasn't available/didn't exist yet, then that would be the case that was used. 228/229 are driver side drop cases in Jeeps, so one would work in an XJ as long as there's room in the floorpan. Would be interested to see what kind of shifter Jeep used if they put this case in the XJ/MJ, because the FSJ 228/229 stuff was vacuum actuated for shifting between 2wd and 4wd, with a lever for high lock/N/low range, similar to what the AMC Eagle used(without the low range lever, and the t-cases were called the 118/119 full time AWD, and 128/129, which was Eagle's "Select-Drive", which had 2wd option). Link to comment Share on other sites More sharing options...
jimoshel Posted January 5, 2012 Share Posted January 5, 2012 Out of curiosity I went thru my stock pile. Found a 242AMC. What's different, if anything, between it and a regular 242? :dunno: Link to comment Share on other sites More sharing options...
mvusse Posted January 5, 2012 Share Posted January 5, 2012 If it's done like the 231, it just specifies it has input and output shafts/yokes as specified per customer (AMC). A 231 in a GM truck is a 231C (Chevrolet), Chrysler products (except Jeep) are 231D (Dodge) or 231D-HD (For Dodge, Heavy Duty. They have a 1.25" chain as found in the 241 instead of 1") and ours are 231J (for Jeep). I think the only difference between D and J is the rear output shaft seal. Jeeps use a 1.5" yoke on the driveshafts where Dodges use a 1 9/16".one. Don't know what difference there is between the other ones, including AMC. Link to comment Share on other sites More sharing options...
carnuck Posted January 13, 2012 Share Posted January 13, 2012 21 vs 23 spline with 08/90 being the break point in automatics EXCEPT the 3 speed auto used 84 to 86 was only available with a short 23 spline. AX-15 came on board part way through '89 with 23 spline. Link to comment Share on other sites More sharing options...
Darren Posted January 14, 2012 Share Posted January 14, 2012 Don't swap in a 242. It hangs down too low. Link to comment Share on other sites More sharing options...
mvusse Posted January 14, 2012 Share Posted January 14, 2012 It fits over the same stock transfer case skid as the 231, albeit with less clearance. Link to comment Share on other sites More sharing options...
carnuck Posted January 15, 2012 Share Posted January 15, 2012 Only about 1" lower Link to comment Share on other sites More sharing options...
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