Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 this is my DD. i don't want my pumpkin like this, won't this make premature pinion bearing failure do to low oil flow to it. if i kept my orginal shaft, how would i go about keeping the diff. parallel to the t-case without causing excessive driveshaft angles Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 Good example here. i want my drive line angles to look like this, with the SOA or as close as i can get it NOT LIKE THIS Link to comment Share on other sites More sharing options...
Eagle Posted February 13, 2014 Share Posted February 13, 2014 Duplicate threads merged Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 thanks, now how would i go about keeping my rear diff, parallel to the t-cas after doing an SOA without compromising the driveangles. Link to comment Share on other sites More sharing options...
Blue88Comanche Posted February 13, 2014 Share Posted February 13, 2014 could you possibly get a pic. of what the wj upper and lower control arms look like? ive looked online and there are so many and i don't know which ones they are Page 10 in my build thread, I installed the WJ LCAs WJ LCAs on the right WJ UCAs on the left Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 remember my truck is my daily driver this is how i want it to look in the rear, see how he did the SOA and kept his diff, just about parallel to the t-case. how do go about doing this? with no driveline vibrations Link to comment Share on other sites More sharing options...
Blue88Comanche Posted February 13, 2014 Share Posted February 13, 2014 jack up the rear of the truck and use jack stands to suspend the truck at the frame. remove the axle, cut off the spring perches before you weld on the new perches use tape to hold them in place while you re attach the axle to the rear suspension. make sure its is tight enough not to shift when the truck is lowered lower the truck with the rear axle on jack stands so that the springs take the weight. take measurements raise the truck, make adjustments, repeat as needed. when everything is how you like it tack weld the perches, remove the axle and finish welding them to the axle... -- to determine the angle use a level, or if you have an iphone the ihandy carpenter app has a nice level that shows degrees. Link to comment Share on other sites More sharing options...
Blue88Comanche Posted February 13, 2014 Share Posted February 13, 2014 or better yet, http://comancheclub.com/topic/39063-88-axle-swap-into-a-90-comanche/ yes its an 8.8 and he is doing SUA, but the method to install is the same Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 i got the jest of how to do it, I'm concerned with angles. still having a little trouble. so with this much lift i can still keep my diff. parallel to the t-case. the angle where the driveshaft meets the yoke on either side won't be too excessive. EXAMPLE. The higher my engine and trans gets above the axle the greater the angle will be where drivehsaft and yoke meet. with the SOA, would these angles be to hard? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 13, 2014 Share Posted February 13, 2014 Do some measurements and calculations and figure out your pinion angle with various lift options. It shows you how to do it on the Tom Woods web site where you stole the above pic from. All you ned is a magnetic angle finder. A good quality u-joint, like the Dana 1310 joint, can tolerate up to an 11* angle, and some guys claim to run up to 15* with no problems. I stayed SUA when I did my lift and used 2* steel wedges between the axle and springs to correct the the pinion angle. Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 thanks, would a crossmember drop kit help? Link to comment Share on other sites More sharing options...
92tanMJ Posted February 13, 2014 Share Posted February 13, 2014 Do some measurements and calculations and figure out your pinion angle with various lift options. It shows you how to do it on the Tom Woods web site where you stole the above pic from. All you ned is a magnetic angle finder. A good quality u-joint, like the Dana 1310 joint, can tolerate up to an 11* angle, and some guys claim to run up to 15* with no problems. I stayed SUA when I did my lift and used 2* steel wedges between the axle and springs to correct the the pinion angle. ^ These work well. I used them on my cherokee and it fixed my vibrations And a tcase drop is nothing more than a bandaid for the real issue. IMO it sounds to me like you should just get an SYE and call it good. lol and stop over thinking it Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 but i don't want my diff. pointing up in the air. in post 27 second pic. it seems it would cause the pionion bearing to fail faster seeing the lack of gear oil flowing to it Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 Do some measurements and calculations and figure out your pinion angle with various lift options. It shows you how to do it on the Tom Woods web site where you stole the above pic from. All you ned is a magnetic angle finder. A good quality u-joint, like the Dana 1310 joint, can tolerate up to an 11* angle, and some guys claim to run up to 15* with no problems. I stayed SUA when I did my lift and used 2* steel wedges between the axle and springs to correct the the pinion angle. this will fit in the stock SY driveshaft, how are they different then stock ujoint? Link to comment Share on other sites More sharing options...
skidoo_j Posted February 13, 2014 Share Posted February 13, 2014 thanks, would a crossmember drop kit help? It's not needed. Your next hurdle you will encounter is with this much lift and keeping stock rear end you might look into getting a longer yoke so you have more spline engagement at transfer case. Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 funny i was thinking that. where would you buy a longer SY Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 but i don't want my diff. pointing up in the air. in post 27 second pic. it seems it would cause the pionion bearing to fail faster seeing the lack of gear oil flowing to it Zack this why i don't want the CV or double cardon shaft. better pic of what i don't want in post # 22 Link to comment Share on other sites More sharing options...
Eagle Posted February 13, 2014 Share Posted February 13, 2014 thanks, would a crossmember drop kit help? You have a long bed. Don't worry about it. Link to comment Share on other sites More sharing options...
skidoo_j Posted February 13, 2014 Share Posted February 13, 2014 but i don't want my diff. pointing up in the air. in post 27 second pic. it seems it would cause the pionion bearing to fail faster seeing the lack of gear oil flowing to it Zack this why i don't want the CV or double cardon shaft. better pic of what i don't want in post # 22 Regarding premature bearing wear would not be an issue. There are baffles and slingers inside the diff that will lube it even at that angle. When it's at that angle it is a trick to filling it as you still need to put the same volume of oil as before, so a hill is really nice so you can get the nose of the vehicle down. Otherwise you can get a new rear diff cover with a higher fill plug. You can obtain a new longer SY from many places. A bit of research and you'll find ones you can get from a junk yard, or you can get a new one off ebay or from tom woods. I did eventually go sye after doing same thing you're doing. I however did not got with a double cardone shaft as I did not want to re-cut and weld my perches. And was not going to use shims as I didnt want more lift. I went sye because I was with a buddy in an xj that managed to pull his driveline from his transfercase, it broke when spinning, dumped all his fluid and we had to be towed because he couldn't run it in fwd as the rear of the transfercase was wide open with the yoke out. Link to comment Share on other sites More sharing options...
92tanMJ Posted February 13, 2014 Share Posted February 13, 2014 Yeah I saw that and that one looks messed up. It's a double edge sword man..yeah the tcase (cross member) drop you want to do will help with angles and help to save the pinion bearings in the long run..but it also kills your motor mounts.. Have you thought about lifting your truck less? I know the idea of low cog (center of gravity) isnt popular but it has many benefits Link to comment Share on other sites More sharing options...
Blaine Posted February 13, 2014 Author Share Posted February 13, 2014 ok so i can do this lift and NOT have my pumpkin up in the air, or at least not to the degree in post 22. and with the SYE, would i need to lengthen my driveshaft? Link to comment Share on other sites More sharing options...
Blue88Comanche Posted February 13, 2014 Share Posted February 13, 2014 ok so i can do this lift and NOT have my pumpkin up in the air, or at least not to the degree in post 22. and with the SYE, would i need to lengthen my driveshaft? SYE will replace the driveshaft slip yoke with a permanent non slip yoke on the TC. the driveshaft will need to be replaced with one that allows compression and extension for suspension travel (picture the front drive shaft for example it is basically a SYE setup) so you will not use the stock drive shaft. Link to comment Share on other sites More sharing options...
Blaine Posted February 21, 2014 Author Share Posted February 21, 2014 to keep stock driveshaft and do this SOA how much longer would the new SY need to be? Link to comment Share on other sites More sharing options...
92tanMJ Posted February 22, 2014 Share Posted February 22, 2014 Pretty sure the slip yoke isn't longer but the drive shaft is Link to comment Share on other sites More sharing options...
Blaine Posted February 22, 2014 Author Share Posted February 22, 2014 but i don't want my diff. pointing up in the air. in post 27 second pic. it seems it would cause the pionion bearing to fail faster seeing the lack of gear oil flowing to it Zack this why i don't want the CV or double cardon shaft. better pic of what i don't want in post # 22 Regarding premature bearing wear would not be an issue. There are baffles and slingers inside the diff that will lube it even at that angle. When it's at that angle it is a trick to filling it as you still need to put the same volume of oil as before, so a hill is really nice so you can get the nose of the vehicle down. Otherwise you can get a new rear diff cover with a higher fill plug. You can obtain a new longer SY from many places. A bit of research and you'll find ones you can get from a junk yard, or you can get a new one off ebay or from tom woods. I did eventually go sye after doing same thing you're doing. I however did not got with a double cardone shaft as I did not want to re-cut and weld my perches. And was not going to use shims as I didnt want more lift. I went sye because I was with a buddy in an xj that managed to pull his driveline from his transfercase, it broke when spinning, dumped all his fluid and we had to be towed because he couldn't run it in fwd as the rear of the transfercase was wide open with the yoke out. Pretty sure the slip yoke isn't longer but the drive shaft is well if there is one to be had, how much longer would it need to be, and if i were to look in a junkyard what vehicles come with longer SY that will fit into the 231 t-case and have same u-joints? and what about a GM long slip yoke, saw that on a thread here, will that fit Link to comment Share on other sites More sharing options...
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