Preservation of a 68 Camaro

[cook_dw]

Started cleaning the yoke and I think my evaporust has fought the good fight but its done.  I'll be ordering more in the following days.

Photo 947 - Yoke before cleaning

[cook_dw]

Photos 948 - 950 - After cleaning and evapo.  Still not happy with the results so I am gonna give it another cleaning before the rebuild.  Note the yellow marking.

[cook_dw]

Here is why I said I needed new Evaporust.  After sitting for 48hrs this is the result.. 

Photos 951 - 952 - Backing plate

[70L34]

I would say you got your money's worth on that Evaporust.

[cook_dw]

Finally got the pinion yoke cleaned completely and now its time to set up the diff.

Photos 953 - 954 - Yoke

[cook_dw]

Photos 955 -956 - Yoke cont.

[cook_dw]

I decided to go with a solid pinion shim for this application.  I measured the old crush sleeve and it was 2.283 - 2.278".  I added shims to the sleeve to hit right at 2.282" and left the pinion seal out while I attempt the setup.  Overall the carrier shims were 0.242" on the left and 0.063, 0.063, 0.098" on right of the carrier looking at the diff.  Overall total was 0.476".  the final setup was on the left 0.242 & 0.013" and the right side was 0.160, 0.063" for a total of 0.0478".  This put the backlash right at 0.006 - 0.007".  These are used gears and do not show the same pattern as new gears but this is an acceptable wear pattern (confirmed by a couple of folks that have experience).  Pinion shim could have been a little thicker to deepen the pattern engagement but for all I am happy with the look.  Worst case once the car is up and running and if there is a whine on decel then I will go back into it.

Photos 957 - 958 - Pinion installed with the correct resistance on the bearings.  I've always gone off of feel and it hasn't failed me yet.  Note:  the carrier shim photos are not the final shims used for the setup.  Just ones I tried using to accomplish the correct backlash.

[cook_dw]

Photos 959 - 960 - Carrier bolted down using a crossing pattern and then using a magnetic base and dial indicator confirmed the backlash was 0.006 - 0.007".

[cook_dw]

Photos 961 - 962 - gear mesh

[cook_dw]

Photos 963 - 965 - Pinion seal, "New" aluminum diff cover, vent and yoke.


Going today to hopefully get gear lube, posi additive and evaporust should be delivered today or tomorrow.

[maroman]

As I have said before I am impressed. Have never used Evapo Rust, guess I'm going to have to try it. Does it need to be neutralized after soaking? AND I never knew '68 Zs had aluminum pumpkin covers.

[cook_dw]

As I have said before I am impressed. Have never used Evapo Rust, guess I'm going to have to try it. Does it need to be neutralized after soaking? AND I never knew '68 Zs had aluminum pumpkin covers.

You are supposed to rinsh the part with distilled water I believe but I never do.  Wipe it down and let it air dry.  Then apply something for protection.  Aluminum diff cover is a "Day 2" item.  Not original.   

[169INDY]

Another Vapo Trick is:

1) Never use or Store product in a ferrous container. (For Best Performance)
2) If you are a Small Parts user, Dispense you small volume of product needed to accomplish the Job and store "USED" liquid separately from Virgin Liquid, do not pour back into the new product. This product has a shelf life and if you putrefy your new product with used it can reduce the product effectiveness.

This stuff is amazing.

[cook_dw]

Correct.  I always have some type of plastic container (coffee jug) for small parts.  5 gal pale is how I order it.

[maroman]

Thank you both for good information. I'm going to have to try this stuff.