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What u-joint for 1LE DS and stock rear

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  • #1

    What u-joint for 1LE DS and stock rear

    I've been searching for a couple of days now, and can't seem to get a simple answer.

    I'm thinking the rear u-joint (pinion side) is starting to show some wear, so rather than just replace one, I''m most likely going to replace both. I've searched for the proper u-joint p/n, but can't find any definitive answers.

    I know the 1LE requires a different u-joint than the steel DS. However, the answers I found, "the rear one needs a combo unit," "the front one is standard", "just get the one GM also uses" are about as vague as can be.


    Does anyone have a p/n for the u-joint on the tranny side and a p/n for the u-joint on the pinion yoke side (using the 1LE DS)? This is driving me nuts...


    Also, are u-joint girdles necessary, or just fluff? I noticed on Summit that several manufacturers make girdles/straps, but can't tell if they're overkill for my power (350 hp, 375 ft/lbs). I'm just looking for a reliable set-up.

    Oh yeah...I've had a driveline (I think...not sure if it's a tire yet) vibe at 70+ and want to eliminate the source. I found one tire out of balance, so I rebalanced but haven't tested it out at speed yet. I noticed the u-joint had some resistance and was popping when I had it off, so I want to remedy over the winter.
    Al 96 Ram Air T/A
    Mods: Build # 784 * Hotchkis STB * SFCs * Borla cat back w/QTP cut-out * AS&M/RK Sports Mid-length headers w/single CAT * Koni SA shocks on lower perch w/ lowered rear * Strano Hollow front & rear antisway bars * 1LE front/rear springs * 1LE aluminum driveshaft * Strange 4.10 gears w/ Zexel Torsen diff. * ARP bearing cap studs & aluminum diff cover* J&M Hotpart poly/poly rear LCAs and poly/poly panhard bar * RAM Powergrip clutch w/ LT4 PP and RAM billet Al flywheel * C5 Z06 brakes * C6 Z06 wheels * Spohn T/A * Spohn DS Loop * fully custom interior w/ custom audio
    Tags: None
  • #2
    Why would you say its showing wear? Are they making noise? Did you look at the bearing?
    Eddie
    2000 M6 Trans Am
    Tune+exhaust=344WHP

    Comment

    • #3
      When the shaft was out, I could feel the joint binding and getting hung up when I moved it around. It just didn't feel smooth like I thought it would. Might be fine, but if the tire re-balance doesn't work, I want to have a game plan of what to look for next.


      This vibration has been bugging me for a while.
      Al 96 Ram Air T/A
      Mods: Build # 784 * Hotchkis STB * SFCs * Borla cat back w/QTP cut-out * AS&M/RK Sports Mid-length headers w/single CAT * Koni SA shocks on lower perch w/ lowered rear * Strano Hollow front & rear antisway bars * 1LE front/rear springs * 1LE aluminum driveshaft * Strange 4.10 gears w/ Zexel Torsen diff. * ARP bearing cap studs & aluminum diff cover* J&M Hotpart poly/poly rear LCAs and poly/poly panhard bar * RAM Powergrip clutch w/ LT4 PP and RAM billet Al flywheel * C5 Z06 brakes * C6 Z06 wheels * Spohn T/A * Spohn DS Loop * fully custom interior w/ custom audio

      Comment

      • #4
        Originally posted by Al 96 Ram Air T/A
        When the shaft was out, I could feel the joint binding and getting hung up when I moved it around. It just didn't feel smooth like I thought it would. Might be fine, but if the tire re-balance doesn't work, I want to have a game plan of what to look for next.


        This vibration has been bugging me for a while.
        Are you getting the imfamous Freeway vibration? I dont really think the U-Joints being bad will cause that. Its either tires, or the actual driveshaft. Could also be your Flywheel/Clutch assembly (if your M6).
        Eddie
        2000 M6 Trans Am
        Tune+exhaust=344WHP

        Comment

        • #5
          That is really strange. I am looking at the parts lists and it shows the "prop shaft" 93-95 with 3.4, 95-02 with 3.8, and 93-97 with LT1 but no 98-02 with LS1. It also does not show the 1LE "prop shaft" either. So it only shows the U joint for the LT1. Might I also say what a goofy design for the V6 driveshaft. Who dreamed that up.

          BTW yes the U joint can cause vibrations. I had a problem one time with a vibration in the butt. I put 2 U joints from an auto parts place in it trying to fix it. I took the drive shaft to Doraville drive lines and they said nothing was wrong but to put in a Spicer U-joint in it. I did and the vibration went away. Not all U-joints are created equal.

          http://www.spicerparts.com/driveshaft/index.asp
          2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

          1995 Z28, many mods, SOLD

          A proud member of the "F-Body Dirty Dozen"

          Comment

          • #6
            That's exactly why I'm having a hard time. Trying to find the part numbers for a 96 LT1 with a 1LE DS is ptic.
            Al 96 Ram Air T/A
            Mods: Build # 784 * Hotchkis STB * SFCs * Borla cat back w/QTP cut-out * AS&M/RK Sports Mid-length headers w/single CAT * Koni SA shocks on lower perch w/ lowered rear * Strano Hollow front & rear antisway bars * 1LE front/rear springs * 1LE aluminum driveshaft * Strange 4.10 gears w/ Zexel Torsen diff. * ARP bearing cap studs & aluminum diff cover* J&M Hotpart poly/poly rear LCAs and poly/poly panhard bar * RAM Powergrip clutch w/ LT4 PP and RAM billet Al flywheel * C5 Z06 brakes * C6 Z06 wheels * Spohn T/A * Spohn DS Loop * fully custom interior w/ custom audio

            Comment

            • #7
              Are you sure that the 1LE uses a different U-joint than the LT1 or LS1?
              2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

              1995 Z28, many mods, SOLD

              A proud member of the "F-Body Dirty Dozen"

              Comment

              • #8
                FYI the V6 and V8 uses the same U-joint. GM#12471502
                2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

                1995 Z28, many mods, SOLD

                A proud member of the "F-Body Dirty Dozen"

                Comment

                • #9
                  Well...honestly...no.


                  Here's a copy of one post I found on CZ28.com from several years ago:

                  *******************************
                  THESE ARE FOR THE 1LE DRIVESHAFT, NOT SURE ABOUT THEM WORKING WITH THE LS1 ALUMINUM DRIVESHAFT AND I KNOW THEY WILL NOT WORK WITH THE STEEL DRIVESHAFTS!

                  THE 1LE USES A 1310 SERIES ON THE DS SIDE, AND THE STOCK PINION YOKE IS A 3R.

                  STOCK REAR TO 1LE:
                  +NEAPCO/PDQ 3-3130
                  +BRUTE FORCE 3-3130BF
                  +ROCKFORD K3022
                  +SPICER 5-3022X
                  +PRECISION 350/372

                  1350 PINION TO 1LE:
                  +NEAPCO/PDQ 3-3140
                  +BRUTE FORCE 3-3140BF
                  +ROCKFORD K460
                  +SPICER 5-460X
                  +PRECISION 348

                  ****************
                  Now looking at that, one would believe they are different. What confuses me is that it states the 1LE uses a 1310 on the DS side. So, I'm assuming(?) that means the tranny side?

                  Then, it states that the pinion yoke is a 3R. A what?

                  Then the two tables: The table listing stock rear to 1LE...is this the 3R u-joint? Are these numbers even correct??

                  Then the second table: 1350 pinion to 1LE. Is this what the stock pinion is, or does this mean what u-joint to use if the rear was not stock, and changed to a 1350 yoke.


                  I checked Summit, and as I thought, they list nothing to help. Then I checked Jegs and sure enough, they give a pull-down menu asking if the shaft is aluminum or not. So, one would assume the u-joints are specific to the 1LE and steel DS, right?

                  This is crazy...
                  Al 96 Ram Air T/A
                  Mods: Build # 784 * Hotchkis STB * SFCs * Borla cat back w/QTP cut-out * AS&M/RK Sports Mid-length headers w/single CAT * Koni SA shocks on lower perch w/ lowered rear * Strano Hollow front & rear antisway bars * 1LE front/rear springs * 1LE aluminum driveshaft * Strange 4.10 gears w/ Zexel Torsen diff. * ARP bearing cap studs & aluminum diff cover* J&M Hotpart poly/poly rear LCAs and poly/poly panhard bar * RAM Powergrip clutch w/ LT4 PP and RAM billet Al flywheel * C5 Z06 brakes * C6 Z06 wheels * Spohn T/A * Spohn DS Loop * fully custom interior w/ custom audio

                  Comment

                  • #10
                    See if this sheds some light on this foggy situation. Scroll down to the slip yokes and it shows the difference in the 1350 and 3R series. It's about 3/4 the way down the page.
                    http://www.transmissioncenter.net/4l...rmance%20Parts

                    It looks like you can tell which one by the cap size.
                    3R uses 1 1/8" caps
                    1350 uses 1 3/16" caps
                    2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

                    1995 Z28, many mods, SOLD

                    A proud member of the "F-Body Dirty Dozen"

                    Comment

                    • #11
                      First off, let me remind everybody that not all LS1 driveshafts were aluminum- I know mine wasn't since it also came with the high fuel mileage 2.73 rear end.

                      That said, I swapped an aluminum shaft from a B4C camaro. Not sure, the B4C's used a lot of parts from the 1LE bin- swing arm bushings and swing arms, etc. They are built pretty heavy for the pursuit work they were supposed to do-

                      Anyway, it was a total bolt-in, the yoke was the same. Certainly lightened the driveline- Suppose I could look up the part numbers when I get back to work-
                      2001 Z28 A4 - 160 deg t-stat, 3.42 gears, WS6 sway bars, rear springs and shocks, UMI SFC's, Torque Arm and STB, leather Firebird seats, Borla, SLP Y-pipe and lid, ZO6 cam and springs - 332 RWHP and 346 RWTQ, not bad for 'almost stock' - work in progress
                      "Black, the fastest color"

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