" hey grumpy, I recently swapped from a TH350 to a 200r4 and I had to get a new transmission slip yoke because the old u-joint damaged the original slip yoke when it failed, now I purchase a used slip yoke that looked decent, at a salvage yard, but it won,t slide into the new transmission more than about 2" is this normal on a 200r4?"
http://www.therangerstation.com/Magazine/summer2008/ujoints.htm
http://www.crawlpedia.com/u_joints.htm
Ok, first step is obviously to clean the parts up and carefully inspect the splines on both the transmission out-put shaft and the slip yoke, count the splines and look at them with a brite light, use a caliper to measure carefully. most slip yokes will slide in at least 3" so inspect your drive shaft splines on your slip yoke for crud or bent splines, since it slips in 2" chances are good the splines are either twisted or full of crud keeping it from slipping deeper
YES EVERY MECHANIC NEEDS< TO INVEST IN AND HAVE A FEW PRECISION MEASURING TOOLS
measure carefully and do your research CAREFULLY, and yes there are conversion u-joints where one side is lets say a different width,or bearing diam. or both so a drive shaft with say 1310 size u-joint can be used with a yoke that fits 1330 size u-joints or the bearings are a different diameter from the other perpendicular bearing set
http://theujointstore.com/cou.html
http://www.oreillyauto.com/site/c/searc ... ion&mc=PRE
http://www.randysdriveshaft.com/combo.html
remember its common for some transmissions to have a master spline which mandates the slip yoke can only slide in indexed in one location to insure it goes in exactly the same way, its also fairly common for the splines to get twisted or filled with crud, so cleaning and careful inspection before assembly is mandatory.
be sure to grease the splines and be sure the rear seal is correct for the application.
slip yokes come in several diameters lengths, spline counts ETC.
http://www.actionmachineinc.com/slipyoke.aspx
http://www.driveshaftspecialist.com/Tra ... 0yoke.html
TWISTED SPLINES
KEY OR INDEXED SPLINE
http://www.circletrack.com/drivetrainte ... _delivery/
I thought this diagram above covered yoke length requirements fairly well, obviously you might require a different length drive shaft or the yoke you use might need to be cut a bit shorter in some applications , but remember the yoke needs to move in and out freely without binding and the u-joint should be fairly close to the rear of the transmission as excessive extra yoke length provides leverage that can cause damage if a u-joint fails
you obviously must know the spline count and shaft diameter, but these are fairly standard, the yoke length is not, you simply slide the yoke into the trans tail till it bottoms outdraw a line on the spined yokes outer surface,then back it out 1" and draw a new line,remove the yoke,there should ideally be about 3" or a bit more from the second line to the end of the yoke, insuring good spline contact , there should be less than 2" from the first mark drawn to the u-joint saddle, in an ideal world, but obviously your drive shaft u-joint spacing length comes into play here!
OK, if you don,t have a spline yoke to fit the trans yet ,just slide a strait stiff soda straw in between the spline shaft and the inner trans tail, measure the depth it will slide in and you can use that depth measurement, lets say it slides in 4.7", if so you want a spline yoke at least 3.5- 4"contacting the splines with 1" of possible movement without contact,or bottoming out in the trans, so about 5.5" would be ideal,so you could get 3.7" of spline engaged and 1.8" before the u-joint,would in theory contact the trans tail shaft, (yes it bottoms out in the trans before that could happen), lets say your choices are 3.5" and 7.5" 3.5" is too short
you would buy the 7.5" and have a machine shop cut it to the ideal length AFTER you measure the drive shaft length and spline engagement
http://www.therangerstation.com/Magazine/summer2008/ujoints.htm
http://www.crawlpedia.com/u_joints.htm
Ok, first step is obviously to clean the parts up and carefully inspect the splines on both the transmission out-put shaft and the slip yoke, count the splines and look at them with a brite light, use a caliper to measure carefully. most slip yokes will slide in at least 3" so inspect your drive shaft splines on your slip yoke for crud or bent splines, since it slips in 2" chances are good the splines are either twisted or full of crud keeping it from slipping deeper
YES EVERY MECHANIC NEEDS< TO INVEST IN AND HAVE A FEW PRECISION MEASURING TOOLS
measure carefully and do your research CAREFULLY, and yes there are conversion u-joints where one side is lets say a different width,or bearing diam. or both so a drive shaft with say 1310 size u-joint can be used with a yoke that fits 1330 size u-joints or the bearings are a different diameter from the other perpendicular bearing set
http://theujointstore.com/cou.html
http://www.oreillyauto.com/site/c/searc ... ion&mc=PRE
http://www.randysdriveshaft.com/combo.html
remember its common for some transmissions to have a master spline which mandates the slip yoke can only slide in indexed in one location to insure it goes in exactly the same way, its also fairly common for the splines to get twisted or filled with crud, so cleaning and careful inspection before assembly is mandatory.
be sure to grease the splines and be sure the rear seal is correct for the application.
slip yokes come in several diameters lengths, spline counts ETC.
http://www.actionmachineinc.com/slipyoke.aspx
http://www.driveshaftspecialist.com/Tra ... 0yoke.html
TWISTED SPLINES
KEY OR INDEXED SPLINE
http://www.circletrack.com/drivetrainte ... _delivery/
I thought this diagram above covered yoke length requirements fairly well, obviously you might require a different length drive shaft or the yoke you use might need to be cut a bit shorter in some applications , but remember the yoke needs to move in and out freely without binding and the u-joint should be fairly close to the rear of the transmission as excessive extra yoke length provides leverage that can cause damage if a u-joint fails
you obviously must know the spline count and shaft diameter, but these are fairly standard, the yoke length is not, you simply slide the yoke into the trans tail till it bottoms outdraw a line on the spined yokes outer surface,then back it out 1" and draw a new line,remove the yoke,there should ideally be about 3" or a bit more from the second line to the end of the yoke, insuring good spline contact , there should be less than 2" from the first mark drawn to the u-joint saddle, in an ideal world, but obviously your drive shaft u-joint spacing length comes into play here!
OK, if you don,t have a spline yoke to fit the trans yet ,just slide a strait stiff soda straw in between the spline shaft and the inner trans tail, measure the depth it will slide in and you can use that depth measurement, lets say it slides in 4.7", if so you want a spline yoke at least 3.5- 4"contacting the splines with 1" of possible movement without contact,or bottoming out in the trans, so about 5.5" would be ideal,so you could get 3.7" of spline engaged and 1.8" before the u-joint,would in theory contact the trans tail shaft, (yes it bottoms out in the trans before that could happen), lets say your choices are 3.5" and 7.5" 3.5" is too short
you would buy the 7.5" and have a machine shop cut it to the ideal length AFTER you measure the drive shaft length and spline engagement
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