[DeTomaso] Vibration in Longchamp, part 2

[Tomas Gunnarsson]

Since the driveshafts on a Pantera manage to deal with the camber of the rear wheels I say that the 0.2 degrees should not be the cause.

Tomas

----- Original Message ----- 
From: "thomas" <thomas at hax.se>
To: "Mikael" <mikael_hass at mail.tele.dk>
Cc: <detomaso at poca.com>
Sent: Tuesday, May 05, 2015 9:30 PM
Subject: Re: [DeTomaso] Vibration in Longchamp, part 2


> Do you have a photo of the shaft, preferably installed on the car?
> 
>> 5 maj 2015 kl. 20:55 skrev Mikael <mikael_hass at mail.tele.dk>:
>> 
>>   So wheels are sent to get balanced (won't leave my entire car at any
>>   shop). And the newly bought inclinometer arrived. Seemed like an
>>   accurate one, $150, and very consistent. At the diff I measured at the
>>   flange, 0.00 degrees. At the trans there's always a bit of looseness.
>>   Measured with propshaft just hanging (on yoke), 0.00 degrees (is it
>>   "on"? J) and then with the yoke pushed up by hand, 0.40 degrees. So
>>   trans must be 0.20 degrees up. Does anybody here do this for a living,
>>   can 0.20 degrees produce a vibration?
>> 
>> 
>>   So let's do some math here, and let me know if I got it wrong. There's
>>   about 115 cm from rear of trans to pivot points (engine mounts). So a
>>   full circle of the rear of the trans would be "pi" x 115 x 2 = 722 cm.
>>   With 360 degrees round, that would be 2 cm per degree. And I would have
>>   to lower the rear of the trans 0.20 x 2 cm= 4 mm. That I've done. Can
>>   that really make a difference? Looking at the old trans and mount
>>   versus new, it looks like the new trans is between 4 and 8 mm higher,
>>   so maybe that's it?
>> 
>> 
>>   Also took the chance to turn the propshaft on the rear diff 180
>>   degrees.
>> 
>> 
>>   Will not be able to test for a few days, not too optimistic.
>> 
>> 
>>   Mvh/Regards
>> 
>>   Mikael
>> 
>>   Hass Consult ApS
>> 
>>   +45 31770747
>> 
>>   mikael_hass at mail.tele.dk
>> 
>> 
>> !DSPAM:5549121a198252974427724!
>> _______________________________________________
>> 
>> Detomaso Forum Managed by POCA
>> Posted emails must not exceed 1.5 Megabytes
>> DeTomaso mailing list
>> DeTomaso at poca.com
>> http://poca.com/mailman/listinfo/detomaso_poca.com
>> 
>> To manage your subscription (change email address, unsubscribe, etc.) use the links above.
>> 
>> 
>> !DSPAM:5549121a198252974427724!
> 
> _______________________________________________
> 
> Detomaso Forum Managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at poca.com
> http://poca.com/mailman/listinfo/detomaso_poca.com
> 
> To manage your subscription (change email address, unsubscribe, etc.) use the links above.