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Old September 29th, 2009, 12:15 PM   #1
wally431
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Default Chevy T-Case

well with me doing all this work with the axles in my chevy i'm looking at the Tcase now its a NP241 with the 4L60E tranny which is the 27 spline female input. i see i can convert it to the 32 spline and it looks like i want the slip yoke eliminator? it says cuz of the angle of the drive shaft i'll wanna put in a slip joint i'm reading this from this web site
http://www.high-impact.net/transmiss...case_NP241.htm
my friend that has a jimmy has the 700r4 tranny and he says thats what i want and it looks like it will bolt up to the tcase with the 32 spline conversion. i'm not a wise on all this so any input would help, so as far as i know i should get the 32 spline conversion and the slip yoke eliminator to put in a slip joint, again i'm not all too sure on this so please help me out here, thanks
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Old September 29th, 2009, 12:43 PM   #2
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I'm wondering why you want to convert it to 32 spline?

the 241 is a 27 spline female input which accomadates the 27 spline output of the 700r

Why do you want to convert to 32 splines between the 700r4 and 241 when they should bolt right together, with 27 spline which is adequate?

As for the SYE, JB conversions make them, their 340 bucks and take a hour to install. (just did mine) they shorten your drivetrain by 6" so you U-joint angles aren't as high, which reduces wear.

this sentence really confuesed me
"so as far as i know i should get the 32 spline conversion and the slip yoke eliminator to put in a slip joint"

no, it gets rid of the slip joint that is factory on a 241, which also means new length driveshafts.

Last edited by atvextreme; September 29th, 2009 at 12:48 PM.
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Old September 29th, 2009, 12:49 PM   #3
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well if u say the 27 is strong enough they it will work i was just wondering really. 340 bucks is a little much but if i'm only running like 6 inchs of lift would i need it? for the front i have the high pinion dana 44 so that should line up pretty good with the tcase i hear so thats good. but if i dont need the conversion for now then i wont do it, but if i do then is there any way i could get away with doing it later on or is it needed for the shafts to line up? thanks
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Old September 29th, 2009, 07:51 PM   #4
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what year is the blazer and what are you pulling out of it, a standard u-joint is only good up to 22 or 26 degrees , i forget exactly how much.

thats where the limit will come into play on if you need the SYE and a CV driveshaft.

Understand the SYE not only lessens the angle of the u-joint by allowing your drivshaft to be longer, it allows you to remove the driveshaft without all the fluid from the t-case to spill out.

http://www.pirate4x4.com/tech/billav...aft/index.html

awesome article , i had to read it a few times to get it completely on all the angles.
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