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Let's talk driveline angle.


Derek

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  • 1 year later...
On 9/8/2020 at 4:05 PM, grannyknot said:

I had no idea the stock angle was so much, trucks sometimes have a lot more than that but generally they are not going very fast.  I always shoot for anything between 1 degree but no more than 2.5 and as parallel as I can make the trans and diff.  RT's mount is great in that you can shorten or extend the snubber to find the right angle, the transmission is a lot harder to point than the diff.

Now you're going to laugh but it works very well, the bmw trans is different that the Datsun 5spd so I had to have room to lower the diff to get a good angle.  This rear cross member started out as just a stop gap solution so I could test the angle and keep the progress moving but it worked so well I welded it properly and it has thousands of miles on it now.

 

DSCN0625.JPG

I ended up with something similar to the above once I got away from the factory mount and used an RT mount and shims. I notched the stock cross member for clearance so the pinion could go down further to reflect the angle of the T56 in my 240 using an angle gauge like below. 

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The way I did it only looks at how close to the same vertical angle the flanges are at each end of the drive shaft. All this to eliminate driveline vibration at speed.

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