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E34 UUC DSSR - Double Sheer Selector Rod

E34 UUC DSSR - Double Sheer Selector Rod Increase the precision and smoothness of ANY and ALL shifters -- stock or aftermarket! Whether you have a factory stock shifter or an aftermarket short shift kit, a UUC Double Shear Selector Rod (DSSR) will dramatically improve it. The shift linkage is one of the most over-looked areas for improvement. Usually parts are replaced only when something breaks. But restoring and improving on the basic design can do wonders for your driving experience and piece of mind.

The original shifter linkage was engineered with costs in mind. It uses a lot of plastic and stamped sheetmetal parts to keep costs low. But they quickly wear out and by 50,000 miles there is considerable slop and play in the shifter action. UUC Motorwerks has attacked this problem with precision engineered replacement parts that perform better and last longer than the original factory pieces. The DSSR replaces the factory loosely-mounted selector rod with a beefier and more robust milled aluminum piece. The DSSR gives you a more precise and direct feel when shifting. Along with a fresh replacement of the other shifter bushings you won't have that flimsy feeling and side-side slop of a stock shifter linkage (even when new). The DSSR is a great upgrade to any short shifter, or even for refreshing your stock shift linkage.
You're currently viewing parts for your (E34) 5-Series 1989-1995. Reset your chassis
For accurate results, specify your model below.
UUC DSSR for E34 M5 5 speed 1991-1993 UUC Double Shear Selector Rod - E34 M5 5 Speed (US)
Increases the precision and smoothness of ALL shifters -- OE and aftermarket! Whether you have a factory stock shifter or aftermarket short shift kit, this Dual Shear Selector Rod (DSSR) will dramatically improve it.

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.

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° 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. (see photo at right) The image shows a selector joint that has approximately 25K miles of use.

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.

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).

The DSSR redistributes the torsional forces from the pin/bushing interface to the complete face area on both sides of the selector joint. 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. In-gear "free play" is reduced to approximately 10mm total when used with a UUC EVO3 shifter.

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).

This rod fits ONLY E34 M5 (1991-1993) with 5 speed manual transmission
Part #: TMS1217
Price: $129.00 (USD) 
UUC DSSR - E28 M5 535i, E24 M6, 635csi, Euro E34 M5 6 Speed UUC Double Shear Selector Rod - E28 M5 535i, E24 M6, 635csi, Euro E34 M5 6 Speed
Increases the precision and smoothness of ALL shifters -- OE and aftermarket! Whether you have a factory stock shifter or aftermarket short shift kit, this Dual Shear Selector Rod (DSSR) will dramatically improve it.

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.

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° 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. (see photo at right) The image shows a selector joint that has approximately 25K miles of use.

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.

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).

The DSSR redistributes the torsional forces from the pin/bushing interface to the complete face area on both sides of the selector joint. 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. In-gear "free play" is reduced to approximately 10mm total when used with a UUC EVO3 shifter.

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).

Fitment Note: The E28 M5 and E24 M6 require the newer, updated selector rod joint (part number 25117503525K). You can add one with your DSSR order below.

This item fits the following BMWs:
1986-1988 E28 BMW 535i 535is M5
1991-1995 E34 BMW Euro E34 M5 with 6 speed manual transmission
1986-1989 E24 BMW 635csi M6
1993-1996 E31 BMW 850i 850ci 850csi
Part #: DSSR147
Price: $129.00 (USD) 
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