K 75,K100, Spline Rebuilds & Repair
|If your BMW spline looks like the ones in the pictures below,
then it might be best to consider a spline repair for the Bevel drive and Driveshaft.
If the U-joint shows wear, it can be replaced at the same time. Turn
around time for this service is 5 to 7 days, plus shipping. If you don't have the
tools to take
the BMW Bevel drive apart, send it as shown in the picture below.
repair is a more cost effective alternative to buying new. The material
composition used at Bruno's to
repair the pinion spline is of rather exotic nature and fully heat treatable
up to 60 RWc. This
process ensures a tuff core and hard tooth contact surface for greater
impact strength and unlimited mileage in Years to come. The Spline is also a
minimum of 9-10mm longer, which gives you an increase of at least 30% more
tooth contact surface which will result in less wear due reduced pressure per square inch. Other rebuilders
use Nickel based Alloys which are not heat treatable and stay medium soft.
The pinion spline is machined to Aircraft specifications and as a result
the clearance tolerance to the drive shaft collar is much tighter, which
eliminates driveline backlash.
Pre 1986 K - Models had a 16 tooth pinion spline installed; if yours is
due for repair it will be updated to a 20 tooth system. If you have any more
questions please contact
Complete rebuilt BMW rear
drive line splines include: pinion shaft spline 20 groove, new spline collar
for the drive shaft with integrated grease reservoir, and a new
pinion shaft with rebuild 20 groove spline machined to Aircraft specifications and
heat treated, the overall length is increased by 9-10 mm for a
increase of +30%
tooth contact surface.
Drive shaft collars with integrated Grease reservoir for extended
service life. With this innovative design feature you don't have to worry
about a dry spline because Grease won't get lost into the hollow of the drive
shaft tube, (it can only escape into the direction of the spline and will
increase spline life!!!).
BMW Bevel drive with
saw tooth shaped pinion shaft.
BMW 20 Groove
pinion shaft with worn teeth.
picture shows the razor sharp edges of the worn teeth.
The teeth on
this pinion are worn down to the point that the drive shaft ratcheted right
11/31 pinion with
, all rebuilt at Bruno's.