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9" Almost In

This is a discussion on 9" Almost In within the Drivetrain forums, part of the LSx Technical Help Section category; Well, I just spent almost hours of grunting, busting up my hands, tearing my jeans and bruising my knees putting ...

  1. #1
    Sold: LS1 '85 El Camino ls1camino's Avatar
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    9" Almost In

    Well, I just spent almost hours of grunting, busting up my hands, tearing my jeans and bruising my knees putting my new 9" into Nymphadora. After all of that work, my drivesaft doesn't match the new rear. I'm wondering, can I just swap out end caps on the the u-joint for smaller ones? And how do I go about finding the right size?

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Also, how much gear oil do I put in the rear? Cause I put about 1.5 quarts in and it didn't even look any was in there (flashlight in the fill plug ). I also just realized that one of the quarts I put in said "LS" on the bottle. I'm assuming that means Limited Slip, which my rear is not (locker). Does it really make a difference (it's the smae weight...75W90)?

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    Senior Member bills98ta's Avatar
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    They make an adapter u-joint. Had to get one for my moser rear. two caps are larger. I don't think you can buy just two larger caps. Is it a spool rear ?

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    Senior Member Bottesini's Avatar
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    For the driveshaft you will need a 1350 conversion U-joint (Napa part #447) unless you went with the 1310 yoke of course.

    The rear should hold right around 3 quarts, and I would just put in whatever the manufacture recommends (mine with the true trac did not need any additive).

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    Member One_Bad_TA's Avatar
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    Quote Originally Posted by Bottesini View Post
    For the driveshaft you will need a 1350 conversion U-joint (Napa part #447) unless you went with the 1310 yoke of course.

    The rear should hold right around 3 quarts, and I would just put in whatever the manufacture recommends (mine with the true trac did not need any additive).
    I had to buy 4 quarts because I kept spilling it trying to poor it into the hole. I had the bracket for the torque arm on and couldnt get fluid in with the stupid hose. I also have the trac loc so no additive was needed. These 4.56s are crazy!! I love them!!

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    I considered getting the conversion U-joint but decided against it after I saw a 1350 spicer! The 1350 Spicers are hugh and will most likely last a lot longer than a 1310/1350 but they will require a different driveshaft. I have a Strange 3" chromoly DS and it is robust.

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    Still The Junior Member RedVertTA's Avatar
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    Got pics of the work in progress?

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    🤔 11s. blackbirdbrain89's Avatar
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    used my stock drive shaft and the nappa 447 u joint works out just right. and note for the books take ur drive shaft to a good shop too put the u joint in cus the stock one is put in then injected with nylon to hold it

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    I had the driveshaft out over the weekend to change my trans seal and noticed that the rear joint had a tight spot. To change it I welded up a simple tool for pressing out the u-joint end caps. The ends contact the u-joint on each side of center so there is no chance of bending anything during removal or reassembly. The plastic injected rings just shear away as you press the caps out -- but it did take some pressure to get them started.

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    Quote Originally Posted by RedVertTA View Post
    Got pics of the work in progress?
    And I forgot to mention, +1 on the request for pics.

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    🤔 11s. blackbirdbrain89's Avatar
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    when i did mine i uses a 15 inch bench vise and a huge ass hand press with a 3 ft bar and was doing chin ups trying to get that pos out.... ok im 175 X3 =575 ft lbs and i even tryed to heat it up with a torch

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    Ouch! Shop press from Grizzly for $209 -- has a good size frame and no chin ups required!

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Pictures as promised:









    I still don't have the sway bar...kinda interesting driving without it...ass end goes everywhere I also need to get the e-brake brackets welded on, have to put it in gear when I park it.

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    King 0f n00bz shady milkman's Avatar
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    oh shit electronic cutout son! ...good work so far...i hate all you guys buliet proofing your drivetrain right now

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    Nice! +1 on the cutout!

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Looks good!

    Why don't you just temporarily bolt on the stock sway bar?

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    Member One_Bad_TA's Avatar
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    Yea the stock sway bar is a PITA. Stock clamps dont fit around the axle tubes nor do 3" exhaust clamps. I still dont have mine in. Im still trying to figure out what to do with it. But my 9" is worrying me a bit, its been whining and Im getting a vibration when Im coasting or under light acceleration. Dont mean to thread jack but does anyone have these problems? It could be my steep gears(4.56) or me being paranoid and I dont want my expensive investment to blow up

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Quote Originally Posted by One_Bad_TA View Post
    Yea the stock sway bar is a PITA. Stock clamps dont fit around the axle tubes nor do 3" exhaust clamps. I still dont have mine in. Im still trying to figure out what to do with it. But my 9" is worrying me a bit, its been whining and Im getting a vibration when Im coasting or under light acceleration. Dont mean to thread jack but does anyone have these problems? It could be my steep gears(4.56) or me being paranoid and I dont want my expensive investment to blow up
    Exact same with mine...I figure it's the Detroit Locker and 4.10s. I'll give it more time, especially after I get the sway bar on and really get on it.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    If it whines now, it will always whine. One Bad T/A and LS1camino, where did you guys get your rears? New or used?

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Quote Originally Posted by 9t8z28 View Post
    If it whines now, it will always whine. One Bad T/A and LS1camino, where did you guys get your rears? New or used?
    Used here.

    And I really don't mind if it whines, as long as it's not that, I'm-just-whining-cause-I'm-going-to-blow-up-on-you whine.

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