|
Weezer 03-04-2002, 08:39 AM I just spent the last half hour searching and now I am totaly confused. I just got a set of 5-760Xs yesterday, eager to see for my self how they measured up I poped an old 5-297x out of an old axle and took a cap off of each to measure them up. To my surprise the hole in the end of the post was larger in the 5-760 then the 5-297:eek: this means less metal in the 5-760. So how are these any stronger? is this a newer version of the 5-760? WTF. Help Maine Jeepah 03-04-2002, 09:00 AM Just got some a lil while back. outside of the "post" is 19mm. Grease "shaft" is 8mm. What does yours measure? MJ Weezer 03-04-2002, 09:04 AM I will measure mine tonight when I get home. Jesse are you out there, any ideas Dirty Harry 03-04-2002, 09:35 AM I thought that the increase in strenght was due to the fact that the 5-760X has a forged cross and the 5-297X has a cast cross, not any increase in material. I am just going off of information that I received on this board though, no firsthand experience. 44Runner 03-04-2002, 09:42 AM Originally posted by Dirty Harry I thought that the increase in strenght was due to the fact that the 5-760X has a forged cross and the 5-297X has a cast cross, not any increase in material. I am just going off of information that I received on this board though, no firsthand experience. I think I heard this somewhere, but I know I heard people saying the the 5-760x had a smaller grease channel, therefore more metal. That is strange... cbassett 03-04-2002, 10:21 AM I posted this info I found, in a thread on the Chevy Talk forum... The changes to the 5-760 include: 1 - Forged trunnion cross. 2 - Larger needle bearings. 3 - Smaller trunnion bearing surface (~.02) 4 - Larger cap ID (~.01) 5 - Thinner c-clip grove (~.02 OD) 6 - smaller c-clips. Read the thread for more info, and links: http://www.pirate4x4.com/forum/showthread.php?s=&threadid=35525 Weezer 03-04-2002, 10:29 AM cbasset: thanks for reposting that, I read that while I was searching. The problem is that in my search I found a picture comparing a 297 and a 760 and it showed that the 760 had a smaller grease channel. My comparison at home is just the opposite:confused: 1TONTJ 03-04-2002, 10:47 AM Drivetrain Direct tested them, and they failed at the same specs as the old ones. Them being stronger is just a rumour. Phil Weezer 03-05-2002, 07:55 AM I measured the grease channel in the 5-760 this morning and it came in at 8mm, the old 5-297 measured at 5mm. Is 5mm the standard for the 5-297:confused: onetoncv 03-05-2002, 08:25 AM its the radious off the journal that makes the difference adding extra strength to the cross - as for tests done by competitors who might have other motives ? check with lance here who ran them hard and did not break the crosses just the caps go figure- Jess Pavemen 03-05-2002, 09:10 AM 5-760 vs 5-297 http://www.pavementsucks.com/tech/spicer5760_1.jpg http://www.pavementsucks.com/tech/spicer5760_2.jpg http://www.pavementsucks.com/tech/spicer5760_3.jpg Weezer 03-05-2002, 09:29 AM This picture ilustrates my question. The 297 shown here has a larger hole then the 760, my old 297 has a smaller hole then the 760. So did they make different 297s 1TONTJ 03-05-2002, 09:40 AM If you guys don't believe the test (I don't see why not - since DTD will be happy to sell you the 760 if you want it). Another alternative: Anyone know anyone that is currently in an engineering course? They do strength of materials stuff don't they? Do the two u-joints for a course lab. Bet if a student told the teacher they wanted to do that - they would let them? Good idea? Let's post in the general area a forum looking for current engineering students? Phil Weezer 03-05-2002, 10:05 AM I dont question the test. I just want to know why I have conflicting data on the grease channel size of the different joints. cmk 03-05-2002, 11:11 AM Originally posted by 1TONTJ Another alternative: Anyone know anyone that is currently in an engineering course? They do strength of materials stuff don't they? Do the two u-joints for a course lab. Bet if a student told the teacher they wanted to do that - they would let them? It's something I would definitely be game to try. The problem I see though is that I don't know of any schools that have the specialized equipment needed to test u-joints. Common engineering school strength of materials labs include tools such as tensile testers, sharpy impact testers, hardness, etc, but nothing that can impart huge torsional shock and steady loads. I know my school (Milwaukee School of Engineering) doesn't have anything. A student's best bet may be to score an internsip or co-op with someone like Dana or GM. cmk 1TONTJ 03-05-2002, 11:34 AM I'm afraid I don't know much about engineering. They tested them torsionally before. I bet I could get Drivetrain Direct to donate a pair of u-joints though, if we could find a place to test them independantly... With 10,000 members we must have someone that works or goes to school at a place that can do this (for free of course ;) since we don't have enough need to pay)... Phil Aggro 03-05-2002, 11:46 AM Originally posted by Pavemen 5-760 vs 5-297 http://www.pavementsucks.com/tech/spicer5760_1.jpg http://www.pavementsucks.com/tech/spicer5760_2.jpg http://www.pavementsucks.com/tech/spicer5760_3.jpg Looks like you've got some brinelling going on! Pavemen 03-05-2002, 03:07 PM Originally posted by Aggro Looks like you've got some brinelling going on! On the new one, it wiped right off, the grease actually made the marks on the new one (I wiped the other posts prior then reloaded them all up with new stuff) The old ones had 100,000 miles on them and are "sealed" and had seen a many water/mud runs. Shoul dhave changed them out at 30k probably. | |