Menu
Cart 0

Chosen Vehicle:

No Chosen Vehicle

UUC BMW Double Shear Selector Rod - ML Performance

UUC BMW E82 E88 Double Shear Selector Rod - After 01/2009 (135i & 1M)

UUC

  • £141.90
    exc. VAT £118.25
    £118.25

Compatibility Check - Enter the last 7 digits of your VIN. We will double check compatibility for you before dispatching!


Description

The UUC DSSR to be used with thUUC EVO3 Short Shifter E82 E88 135i to reduce shift time on your BMW N54 135i.

 

Can also be used with the UUC EVO3 Short Shifter E82 1M to reduce shift time on your BMW E82 N54 1M.

 

 

The goal

While producing a "short" shifter, our more important goal in improving the BMW shifter assembly is to increase the precision and smoothness of the overall operation.

 

The problem

One significant wear area that has never been addressed previously is the wear and ovalization of the linkage connection points at the transmission and the shifter's lower pivot. (figure 1)

 

      UUC BMW Double Shear Selector Rod - ML Performance

      (Figure 1)

      In the original BMW design, the connection at both ends has a large injection-molded plastic bushing. We already know how badly plastic wears in an automotive application, and these areas are not an exception. The design of the selector rod has a pin at 90 degrees to the main rod, which exerts a tremendous amount of leveraged force on the selector joint bushing from one side (known as a single shear force). The result is a steady deformation of the bushing, resulting in looseness and slop in the entire mechanism. (figure 2) The fig. 2 image shows a selector joint that has approximately 25K miles of use.

      UUC BMW Double Shear Selector Rod ML Performance

      (Figure 2)

      The looseness and slop are magnified by the leverage-multiplication effect of the shift lever itself. The result is an in-gear shifter "free play" of 3/4" and up to 1" in either direction, over 35mm total. (figure 3)

      UUC BMW Double Shear Selector Rod ML Performance

      (Figure 3)

       

      The cure

      A temporary fix is to simply replace the selector joint. Unfortunately, this is only a temporary fix as the new joint's bushing will exhibit the same rapid deformation. To permanently fix this, a change in the fundamental design of the pivot is required, changing the assembly to a double shear system with the UUC Double Shear Selector Rod (DSSR). (figure 4 and 5) 

      UUC BMW Double Shear Selector Rod - ML Performance

      (Figure 4)

      UUC BMW Double Shear Selector Rod

      (Figure 5)

      The DSSR redistributes the torsional forces from the pin/bushing interface to the complete face area on both sides of the selector joint. (figure 6)

      UUC BMW Double Shear Selector Rod - ML Performance

      (Figure 6)

      By taking advantage of the strength of steel in the DSSR and the body of the joint, the problem of deformation is eliminated and the movement of the selector rod correlates directly to movement of the selector joint - the only "free play" movement remaining in the shifter assembly is from within the transmission itself. (figure 7)

      UUC BMW Double Shear Selector Rod - ML Performance

      (Figure 7)

      In-gear "free play" is reduced to approximately 10mm total when used with a UUC EVO3 shifter. (figure 8)

      UUC BMW Double Shear Selector Rod - ML Performance

      (Figure 8)

      The original BMW shifter and all other aftermarket shifters (except UUC which uses deformation-free bearings) contain a plastic bushing similar to the selector joint, and the exact same wear and ovalization causes those shifters to get sloppy. The DSSR permanently fixes these shifters also. The DSSR is compatible with all brand shifters, whether original BMW or other-brand aftermarket. When used with the original BMW shifter or other aftermarket shifters, the amount of "free play" will be greatly reduced but varies by shifter (flexation of the shifter shaft contributes to the total "free play" travel).


      Other solutions?

      While there are other replacement selector rods sold in the aftermarket (including "no tolerance" brass and "heavy" selector rods), none of them will get rid of the slop and "free play" in the BMW shifter assembly. These alternate products are not actually improving the shift feel at all, but are simply rods with alternate geometry (either bent or twisted), an accommodation to make the "universal fit" aftermarket shifters fit properly.


      These other aftermarket shifters, even with their "heavy" selector rods, will still be as sloppy as the original BMW shifters they are replacing. While the throw may be shorter, the precision of the assembly is no better than a new BMW part, and will develop the same slop within a few thousand miles. (figure 9)

      UUC BMW Double Shear Selector Rod - ML Performance

      (Figure 9)

       

      Available applications:

      Note: currently available DSSR fitments are suitable for UUC EVO 3-series shifters, original BMW shifters, and all aftermarket shifters.

       

      Compatibility Check

      To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 

       

      Compatibility

      E82/ E88 135i (01/2009+)

      E82 1M 2011-2012

        

      Warranty

      UCC 12 months warranty

       

      Manufactured by

      UCC

       

      Part Number

      DSSR127-1


      Next Day UK Delivery

      Get FREE Guaranteed next day UK delivery for orders over £50 (exc. VAT) on all in stock items. Same day dispatch available if your order is placed before 11:00 GMT on all in stock items!


      Worldwide Shipping

      We ship worldwide via DHL International, simply enter your full address at checkout to see the shipping option(s) and quote(s). Same day dispatch available if your order is placed before 11:00 GMT on all in stock items!