[DeTomaso] follow up on ZF output bearings

[Donny Williams]

Charles- I am no help but I applaud you for tackling this!  You will become 
an expert at this soon and we might all be knocking down your door for your 
assistance!

"Failure is simply not an option!"


My Applause to you!

Donny



----- Original Message ----- 
From: "charles buthala" <charlesbuthala at yahoo.com>
To: <detomaso at realbig.com>
Sent: Saturday, March 10, 2007 11:03 PM
Subject: [DeTomaso] follow up on ZF output bearings


> All Righty then, I got the bearings for the output shafts of the ZF and 
> installed them.  I bent the rules slightly by measuring the traction force 
> of the output shaft and added it, ratio, to the traction force of the 
> differential to adjust the taper bearing / differential torque.
>  In this way I did not have to remove the ring gear from the differential 
> in order to install the bearings and adjust the backlash / gear contact 
> pattern.  Three trials were needed in order to get the proper traction 
> force of between 12 and 16 Lbf, and a proper elliptical pattern on the 
> drive side of the ring gear when bluing was used.
>  In the manual it states that the backlash or slop in the ring gear should 
> be adjusted to the amount written on the ring gear.  I found this on the 
> ring gear; Stamped (1031 309 045 ZF 1), and etched ( 4678, D:75,00 sp; 
> 0,20 (30,8,72). On the two gear teethe on either side of the "sp" were 
> Theta symbols?  I am guessing that the backlash is the sp; 0,20 or 0.008 
> inch.
>  Now the confusing part the back lash was 0.019 when I got a vary nice 
> pattern on the drive side of the ring gear.  The cost side was slightly to 
> the toe side of the gear teethe.
>  I had to remove 0.0085 shim on the left and add this shim and an a 0.006 
> shim additional to the left side to get this result.  I am concerned with 
> the backlash of 0.019  and slightly concerned with the toe pattern of the 
> cost side of the wear pattern.  Any comments would be greatly appreciated.
>
>
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