4l80E RCSB Silverado Yoke Question
Thread Starter
Staging Lane
Joined: Sep 2014
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4l80E RCSB Silverado Yoke Question 
I have read BOTH stickies covering this subject and there are about a MILLION different responses. I also called Denny's Driveshaft two separate time and got two separate answers! First time I called a gentleman said a TH400 COUNTERBORED slip yoke with a conversion u-joint 1350/3R.
The second time I called to verify and order a guy said: http://www.dennysdriveshaft.com/p108..._inside_c.html
Can someone please help me out for Christ sakes??
I have a pre-97 4l80E that I have swapped into my '00 Regular Cab Silverado. I want to use my original driveshaft. It has the 3R u-joint (according the Denny's). I had to melt the injected plastic to remove them.
I have read about the many different 4l80 yokes. Short, long, counterbored,...etc... Yet I can't seem to get a definite answer.
SO WHICH ONE IS IT?
I have a 4l80e with the output shaft FULLY SPLINED with NO O-RING
Thread Starter
Staging Lane
Joined: Sep 2014
Posts: 89
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Napa 447 u-joint will set u right up! And get a long 4l80e stock yoke off ebay. Install it on driveshaft and install into trans. Push it past the rear and check movement or clearance in and out. U want a lil more than 1" travel in and out of trans for suspenion movement. If yoke bottoms out or doesnt have enough movement, u can cut 1" off the end and bevel it. Ive done this to alot of swaps. Works everytime! Stock driveshaft will fit!
Ps. Dont use a th400 yoke. They are usually counter bored and dont have much spline/bearing housing engagement. They will flop around and cause a bad vibration! Learned this the hard way! Good luck!
Ps. Dont use a th400 yoke. They are usually counter bored and dont have much spline/bearing housing engagement. They will flop around and cause a bad vibration! Learned this the hard way! Good luck!
Thread Starter
Staging Lane
Joined: Sep 2014
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Lost me at cut and bevel. I don't want to do that...because I am not skilled in that.
So now I've got yet another answer..a long 4l80 slip yoke. See what I mean? Dang.
Thanks for the suggestion Brandon.
So now I've got yet another answer..a long 4l80 slip yoke. See what I mean? Dang.
Thanks for the suggestion Brandon.
Just get a long 4l80e yoke. Look on ebay and u will see they come in a few diff lengths. Some trans output shaft are shorter splined than others. A long yoke is usually around 7" long. This is what i always use. Sometimes the short yokes dont slide completely into the rear tail housing bushing and will wobble.
Just get a long one and u will be fine. U have the long spline shaft anyways. Your golden!!
Just get a long one and u will be fine. U have the long spline shaft anyways. Your golden!!
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Last edited by brandon6.0; Jun 28, 2018 at 01:04 AM.
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Staging Lane
Joined: Sep 2014
Posts: 89
Likes: 0
Thread Starter
Staging Lane
Joined: Sep 2014
Posts: 89
Likes: 0
TECH Junkie
Joined: Dec 2012
Posts: 3,620
Likes: 1,332
From: Iowa
https://ls1tech.com/forums/automatic...uestion-2.html
Looks like the exact same thing as you. Asked and answered.
Nobody is being an ***, you're looking to be spoon fed info and then getting salty when nobody breaks out the china. Oh and p.s. he's just being sarcastic with you.
You're the one that's building the can yet cant simply cut and grind a yoke if you need to, don't make that everyone else's issue by whining on a forum and calling names.
If the above thread doesn't answer your question, then you need a LONG yoke with FULL splines. Question Answered.
Looks like the exact same thing as you. Asked and answered.
Nobody is being an ***, you're looking to be spoon fed info and then getting salty when nobody breaks out the china. Oh and p.s. he's just being sarcastic with you.
You're the one that's building the can yet cant simply cut and grind a yoke if you need to, don't make that everyone else's issue by whining on a forum and calling names.
If the above thread doesn't answer your question, then you need a LONG yoke with FULL splines. Question Answered.
TECH Junkie
Joined: Dec 2012
Posts: 3,620
Likes: 1,332
From: Iowa
https://ls1tech.com/forums/conversio...tion-help.html
Another thread on this same forum.
Part numbers and everything.
The search function and google are killer tools
Another thread on this same forum.
Part numbers and everything.
The search function and google are killer tools
Thread Starter
Staging Lane
Joined: Sep 2014
Posts: 89
Likes: 0
https://ls1tech.com/forums/automatic...uestion-2.html
Looks like the exact same thing as you. Asked and answered.
Nobody is being an ***, you're looking to be spoon fed info and then getting salty when nobody breaks out the china. Oh and p.s. he's just being sarcastic with you.
You're the one that's building the can yet cant simply cut and grind a yoke if you need to, don't make that everyone else's issue by whining on a forum and calling names.
If the above thread doesn't answer your question, then you need a LONG yoke with FULL splines. Question Answered.
Looks like the exact same thing as you. Asked and answered.
Nobody is being an ***, you're looking to be spoon fed info and then getting salty when nobody breaks out the china. Oh and p.s. he's just being sarcastic with you.
You're the one that's building the can yet cant simply cut and grind a yoke if you need to, don't make that everyone else's issue by whining on a forum and calling names.
If the above thread doesn't answer your question, then you need a LONG yoke with FULL splines. Question Answered.
Thread Starter
Staging Lane
Joined: Sep 2014
Posts: 89
Likes: 0
Brandon6.0,
Here are some pictures of the above mentioned yoke installed. I assume since it does not actually contact the trans, it needs to be cut down? I also included a picture of the inside of said yoke.
TECH Junkie
Joined: Dec 2012
Posts: 3,620
Likes: 1,332
From: Iowa
What do you mean actually contact the trans? You want the flange of the yoke to touch the back of the tailhousing?
Bottom the yoke...measure center of u joint on yoke to center of u joint on rear end with suspension loaded (read: not on a 2 post lift or jack stands on the framerails). Take that measurement minus 1.5"
Get driveshaft made at that length
Bottom the yoke...measure center of u joint on yoke to center of u joint on rear end with suspension loaded (read: not on a 2 post lift or jack stands on the framerails). Take that measurement minus 1.5"
Get driveshaft made at that length