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Posted by: bugat5speed May 26 2019, 03:12 AM

Our new reinforced 915 differential cases are nearly ready for sale. We are currently doing the final milling procedures on a 5-axis machine to the casted gearbox cases. The cases are made from casted alumnium and are heat treated. Very solid material, which has been used on many other very stabile products yet. They were engineered much stronger than the original cases ever were. Differential bearings of 930 gearbox can be mounted. Differences on shape only on 2nd sight.
First finnished parts in the next two-three weeks.
First internal project is building a 915 gearbox with this case for a G-model with 964 engine.

More info at short notice on:
www.bott-fahrzeugtechnik.de
www.bott-parts.de

pictures to follow

Martin

Posted by: bugat5speed May 26 2019, 03:26 AM

currently have Problems to upload pictures. Size only about 700 kB?

Will try later

Posted by: Chi-town May 26 2019, 07:38 AM

Pricing?

Posted by: bugat5speed May 27 2019, 12:19 AM

Price will be 2.690 Euro incl. VAT. For export to the US it is 2.260 Euro.

Still not able to upload pictures. Reduced size to only about 700 kB.

Does anyone know how to solve the problem?

Posted by: mepstein May 27 2019, 07:38 AM

QUOTE(bugat5speed @ May 27 2019, 02:19 AM)

Posted by: mepstein May 27 2019, 10:50 AM

Pics


Attached thumbnail(s)

Posted by: mb911 May 29 2019, 07:35 AM

Wow looks amazing..

Posted by: bretth May 29 2019, 07:43 AM

That is awesome.

Posted by: bugat5speed May 29 2019, 12:12 PM

Did mill two sides of the gearbox on my own CNC milling centre to make sure that it fits well. Today gave the parts away for 5-axis milling of the other sides. My mill is quite small and it is only a 3 axis machine with a 4th axis to be added.
Think the first two samples will be finnished next week.
We cut the threads for the 916 bracket into the surface wher ethe bearings sit, so it also can easily be used for strong 916 conversions.
Thank you for your positive comments.
As soon as I have them back from milling I will make further pictures and post them here.

Martin

Posted by: Mueller May 29 2019, 01:47 PM

Beautiful casting!

should I start looking for a 915 box now?

Posted by: mepstein May 29 2019, 02:08 PM

QUOTE(Mueller @ May 29 2019, 03:47 PM)

Beautiful casting!

should I start looking for a 915 box now?

Posted by: bugat5speed May 30 2019, 02:18 AM

Hi,
export Price in $ about 2.600 $. The sales Price in Germany is inclusive german VAT, which can be subtracted for Export to the US.

Lots of old 915 trannies have very bad cases. Especially the Magnesium cases are on one side very bad in surface, but on the other side they are mostly completely worn out. If you take such a gearbox and put torque on them you will not have fun for a long time.

We are building some gearboxes for cars with very powerful engines which are partly being used for races and we know, that the old cases do not stand this.

Even the later aluminium cases have their Problems (worn out bearing places) and could be more stabile. Ring and pinion are not held in Position if high torque is applicated and that destroys the parts.

That was the starting idea for our case...

Posted by: rgalla9146 Dec 28 2023, 10:33 AM

QUOTE(bugat5speed @ May 30 2019, 03:18 AM)