'round n' back again
Explorer
tonite i split the case on the rock trac. toasty feels these are a modest servicable t case. i had an assumption they were much more stronger ; along the lines of the BW 4407.
alas , toasty u were closer to the truth than i.
here is what i found:
4 planets instead of 6. 4 huge, heavy planets easily 1.5 " across
4 planets served quite nicely until the mid nineties when diesels started spitting them out the sides of the case. the engineers went to 6 on the hd cases.
they also went to a 1.5" chain.
a mid shaft support bearing and webbing
what i found in the rock trac, i liked.
quality machining
1.25" chain (stretched),
us made bearings.
good seals
i think the case is too lightly constructed with not enough webbing.
the chain quality is pathetic. it needs and will get a morse chain.
i was hoping for 1.5 chain, a mid shaft support bearing and greater strength in the case. the outer ring of the planets, the ring gear, is held in place by the front input bearing plate i would like to see a snap ring like the other t cases have to hold this gear in
my guess is now inline with the comments toasty has made ; that this is a handy mid-level case that can take average use and abuse, but is not on par with the mitsu case or the boutique makers cases.
im trying to guess that with a 3.06 first gear a 4.01 low range, and 4.6 axle, how much stress is going through the system and where is the weak link.
im guessing the case. the unknown is how much torque can be applied b4 disintigration.
the outer joints are really a joke. like toasty said, they are grenades. drive flanges or yokes if your cheap are a necessary upgrade both front and rear; shafts are 32 spline.
now, interesting discovery. i was bellyaching that my case came from a 2012 automatic. this auto the 580 series uses a rare 26 spline male on the t case input. this fits no known trans other than the 580. i expected to buy a new inputshaft, possibly a bearing retainer face plate , bearing and seal. grumpy.
on very close inspection i noticed this male spline had the slightest play in it. hmmmm. taking two pry tools, i worked them behind the splines between the splines and the seal, pressed down, with some force and the little bugger jumps right up and onto the shop floor. turns out that beneath the weird spline is a normal 23 spline female shaft like all the other cases. this weirdo, had a stub shaft that fit into the 23 spline female.
so now my case should, theoreticaly fit the common 23 spline trans output shafts.
we will see . for my putt putt ways in the wilds (i hate walking out), it should get me an my little trailer whereever i want to go. for throttle stabs and jackrabitt starts in low range, well im unsure.
i can only reacll the mindless abuse the old 208, 1356, 1345 series got and they held together...kind of.
do yourself a favor if you buy one of these cases , at very least, inspect the interior case for stress cracking, and fer heavens sake put a morse chain in. its a 45 minute job.
thank u for listening..
alas , toasty u were closer to the truth than i.
here is what i found:
4 planets instead of 6. 4 huge, heavy planets easily 1.5 " across
4 planets served quite nicely until the mid nineties when diesels started spitting them out the sides of the case. the engineers went to 6 on the hd cases.
they also went to a 1.5" chain.
a mid shaft support bearing and webbing
what i found in the rock trac, i liked.
quality machining
1.25" chain (stretched),
us made bearings.
good seals
i think the case is too lightly constructed with not enough webbing.
the chain quality is pathetic. it needs and will get a morse chain.
i was hoping for 1.5 chain, a mid shaft support bearing and greater strength in the case. the outer ring of the planets, the ring gear, is held in place by the front input bearing plate i would like to see a snap ring like the other t cases have to hold this gear in
my guess is now inline with the comments toasty has made ; that this is a handy mid-level case that can take average use and abuse, but is not on par with the mitsu case or the boutique makers cases.
im trying to guess that with a 3.06 first gear a 4.01 low range, and 4.6 axle, how much stress is going through the system and where is the weak link.
im guessing the case. the unknown is how much torque can be applied b4 disintigration.
the outer joints are really a joke. like toasty said, they are grenades. drive flanges or yokes if your cheap are a necessary upgrade both front and rear; shafts are 32 spline.
now, interesting discovery. i was bellyaching that my case came from a 2012 automatic. this auto the 580 series uses a rare 26 spline male on the t case input. this fits no known trans other than the 580. i expected to buy a new inputshaft, possibly a bearing retainer face plate , bearing and seal. grumpy.
on very close inspection i noticed this male spline had the slightest play in it. hmmmm. taking two pry tools, i worked them behind the splines between the splines and the seal, pressed down, with some force and the little bugger jumps right up and onto the shop floor. turns out that beneath the weird spline is a normal 23 spline female shaft like all the other cases. this weirdo, had a stub shaft that fit into the 23 spline female.
so now my case should, theoreticaly fit the common 23 spline trans output shafts.
we will see . for my putt putt ways in the wilds (i hate walking out), it should get me an my little trailer whereever i want to go. for throttle stabs and jackrabitt starts in low range, well im unsure.
i can only reacll the mindless abuse the old 208, 1356, 1345 series got and they held together...kind of.
do yourself a favor if you buy one of these cases , at very least, inspect the interior case for stress cracking, and fer heavens sake put a morse chain in. its a 45 minute job.
thank u for listening..