Re: 8.8 diff backlash
On Fri, 09 Sep 2005 19:25:24 GMT, aarcuda69062
>In article <q2jUe.24546$FI2.firstname.lastname@example.org>,
> "Steve" <email@example.com> wrote:
>> I recently purchased a 95 Mustang GT. I have a vibration from 90 MPH and up.
>> I've pinpointed it to the diff. The gears were changed to 3.55's, but the
>> set up was not well done. I checked the backlash and I have .020 backlash,
>> which I think is too much. I checked my shim thickness, LH 0.251, RH 0.388.
>> I want to bring the backlash down .010. So, I need to reduce .020 on the
>> left and add .020 on the right. I need 0.231 on the left and 0.408 on the
>> right. Ford does not make the shims in these sizes. I'm assuming the pinion
>> is set too far out. So my question is, Is there some kind of calculation, or
>> does someone know how to set the pinion depth, with the info given, so I can
>> adjust the backlash properly with the side shims available? So that I do not
>> have to buy the tool to set pinion depth. Example, adding a .005 shim to the
>> pinion to get less backlash. In other words, adjusting the backlash with
>> pinion depth. I know, this one's a doozy.
>> Thanks in advance,
>Don't use pinion depth to adjust backlash.
>Pinion depth is set long before backlash is adjusted, pinion
>depth is set where it is supposed to be and then left alone.
>To be done properly, it should be done with the proper measuring
>tools. The ProForm tool is $100 thru Summit racing.
>Aftermarket side shims for backlash can be had from any of the
>common vendors that deal with rear axle parts, Randy's Ring and
>Pinion is probably your best bet. the aftermarket shims can be
>combined to achieve what ever size you need.
>Backlash and bearing preload need to be considered all at once
>when selecting the correct shim size.
this would depend on gear pattern
both pinion and ring may have to be shimmed to find suitable
i have pinion bearings which have been ground out a bot for ez removel
and addand subtract shims to achieve a proper pattern