GirsMJ86 Posted October 30, 2006 Share Posted October 30, 2006 ok i started to do my CAD fix on my 91 yesterday but ran into a snag. i found that this was not connected because the wires had caught on something and broke. and to me it appears to be the switch to tell the 4wd light to come on. what do the rest of you think? i need a new one if anyone has one or can get ahold of one from a JY. none of the MJs in the JYs around me have these. also when i do this CAD fix do i have to put the cover back on upside down or will it stay? should i use something to hold it over maybe? and i should disconnect the vac lines from the shift motor too shouldnt i? Alex Link to comment Share on other sites More sharing options...
feerocknok Posted October 30, 2006 Share Posted October 30, 2006 For JYing, I can go on Wednesday if no one has one, and look through what's there. Link to comment Share on other sites More sharing options...
mjeff87 Posted October 30, 2006 Share Posted October 30, 2006 Yeah, that's the indicator light switch. It will function w/o it just fine, but if you want the dashlight to work, you gotta fix it. For the housing, shim over the fork with some washers/hoseclamps or whatever else you can find. I tried the old flip-the-housing trick on Chuck's YJ but things just didn't line up well enough (might have been because the CAD motor on his axle actually worked in the first place). There are three circlips that hold the shift fork and shaft inside the housing that you have to pop off, then the shaft will slide out of the housing. It's a little frustrating until you figure out exactly how many washers you need to get the fork to line up, where to put them, and remembering how to orient the shaft when you put the circlips back on, but you'll figure it out. Just be patient..... ;) Jeff Link to comment Share on other sites More sharing options...
GirsMJ86 Posted October 30, 2006 Author Share Posted October 30, 2006 ok i got the CAD thingy all done. i just left the vac lines off and took the one c-clip off then slid the fork over and put the c-clip back on. not too hard really. but looks like i need to track down a switch. Alex Link to comment Share on other sites More sharing options...
500 MJ Posted October 30, 2006 Share Posted October 30, 2006 For those of us with non disco front ends that we swapped in, how do we get our 4wd lights to work? Link to comment Share on other sites More sharing options...
Tazmatic Posted October 30, 2006 Share Posted October 30, 2006 For those of us with non disco front ends that we swapped in, how do we get our 4wd lights to work? X2 Link to comment Share on other sites More sharing options...
87manche Posted October 30, 2006 Share Posted October 30, 2006 For those of us with non disco front ends that we swapped in, how do we get our 4wd lights to work? X2 the newer 231 cases had a switch in the t-case to light up the dash light. You'll need one of those. I'm pretty sure it replaced the vac switch. Link to comment Share on other sites More sharing options...
GirsMJ86 Posted October 31, 2006 Author Share Posted October 31, 2006 you can find the write up along with pics for this CAD fix in my 91 project post. with the way i did it wouldnt the switch be pointless? Alex Link to comment Share on other sites More sharing options...
CEThomas Posted October 31, 2006 Share Posted October 31, 2006 I know this is a dumb question, but when you do the CAD fix will the lock both front wheels together like a locker or just run power to the wheel with the most traction? Thanks, Charles Link to comment Share on other sites More sharing options...
JOMJ87 Posted October 31, 2006 Share Posted October 31, 2006 No it doesnt lock it like a locker it makes it think you have a straight axle on that side instead of the vaccum which doesnt always work. Cole Link to comment Share on other sites More sharing options...
GirsMJ86 Posted October 31, 2006 Author Share Posted October 31, 2006 what cole said. i was not really too sure how it worked but once i did it both wheels can still spin independently either way. they don't spin with power untill you engage the transfercase. Alex Link to comment Share on other sites More sharing options...
Pete M Posted October 31, 2006 Share Posted October 31, 2006 Some of us who started with 2wd trucks don't have a light at all and somehow we still manage. :teehee: Link to comment Share on other sites More sharing options...
GirsMJ86 Posted October 31, 2006 Author Share Posted October 31, 2006 ok i was thinking. since all this does really for the most part is turn a command-trac axle into a selec-trac axle, could i swap in the axle shaft from a selec-trac axle on the passenger side? and I'm not too worried about the light. as long as i know the lever is up I'm good. Alex Link to comment Share on other sites More sharing options...
Pete M Posted October 31, 2006 Share Posted October 31, 2006 Use this opportunity to grab shafts that use the larger 297 U-joints and swap in both sides. http://www.madxj.com/MADXJ/technical/te ... dSeals.htm Link to comment Share on other sites More sharing options...
87manche Posted November 1, 2006 Share Posted November 1, 2006 ok i was thinking. since all this does really for the most part is turn a command-trac axle into a selec-trac axle, could i swap in the axle shaft from a selec-trac axle on the passenger side? and I'm not too worried about the light. as long as i know the lever is up I'm good. Alex that's how I operate. Unfortunately you will occasionally forget about it, or think you have the lever pushed down and it's still engaged. I'm going to fix my light :) Link to comment Share on other sites More sharing options...
SGTSnacks Posted December 18, 2013 Share Posted December 18, 2013 I just had the stock 2.5l motor replaced in my 1986 MJ longbed with a 1988 MJ 2.5l. Big trouble. No 4x4 anymore. No dash light saying 4x4. Only 2x2? What do you recommend checking first, assuming the 4x4 shift lever is still connected/attached? Is the front wheel transfer case activated by vacuum or electrically? Cheers, SGTSnacks Link to comment Share on other sites More sharing options...
88whitemanche Posted December 18, 2013 Share Posted December 18, 2013 Vacuum activated you might as well lock it here's the DIY write up http://comancheclub.com/topic/17377-cad-fix-1/ Link to comment Share on other sites More sharing options...
deziped1 Posted December 18, 2013 Share Posted December 18, 2013 Crawl under it and see if they put the front drive shaft back in place. Link to comment Share on other sites More sharing options...
yxmj Posted December 18, 2013 Share Posted December 18, 2013 Crawl under it and see if they put the front drive shaft back in place. Why would you take the drive shaft off to pull the motor? Link to comment Share on other sites More sharing options...
yxmj Posted December 18, 2013 Share Posted December 18, 2013 I just had the stock 2.5l motor replaced in my 1986 MJ longbed with a 1988 MJ 2.5l. Big trouble. No 4x4 anymore. No dash light saying 4x4. Only 2x2? What do you recommend checking first, assuming the 4x4 shift lever is still connected/attached? Is the front wheel transfer case activated by vacuum or electrically? Cheers, SGTSnacks Since both quit working at the same time my best guess is a vac line is off. Quick test is this.....with the truck in park (motor running) take the vac line off the CAD put your finger over the hole on the line that was closest to the passenger wheel....feel vacuum? Now put your finger over the hole on the other line (the one on the CAD side) have a friend pull up on the 4x4 shifter you should feel vacuum on that side. If no vacuum trace the lines back....they go first to the firewall then down to a "Switch" on the transfer case with 4 vac lines.....along the way make sure all lines are connected and intact......you probably had a line knocked off or broken in the swap. To answer you question the transfer case is activated "ENGAGED" when you manually pull the lever back to 4Hi....this pushes a ball on the switch that divers the vacuum from one side of the cad to the other causing the fork to move and slide the sleeve over the split it the axles to join them....it also activated a switch that turns on the 4x4 light.... . :MJ 1: . Good Luck Link to comment Share on other sites More sharing options...
carnuck Posted December 19, 2013 Share Posted December 19, 2013 You have to pull the ring gear and carrier (one piece) from a CAD axle to put a seal behind the carrier if you replace the 2 piece shaft or you won't be able to keep oil in the axle and water/mud out. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now