View Single Post
  #115  
Old 10-13-2021, 12:12 AM
cruiserofland's Avatar
cruiserofland cruiserofland is offline
Yenko Contributing Member
 
Join Date: Sep 2019
Location: Bay Area, California
Posts: 291
Thanks: 769
Thanked 342 Times in 103 Posts
Default

Thanks Rob! Only took me four months to respond Work and life keep me busy but this month marks one year with the car!

Since my last post I've had a steady stream of little projects. The car came without much documentation from its restoration (~2000-2010), so in part I've been "baselining" the car bumper to bumper and documenting everything, correcting little bits as I go (and with regular reading of this forum, CRG, and TC, I learn more every day about the nut-and-bolt details of how an 02D RS Z would have rolled off the assembly line).


I'm eventually hoping to document more or less every nut and bolt, with a list of what's correct, what's not, and whether what's not correct will be replaced or left alone. Two examples: I plan to keep it desmogged and I don't mind leaving the shiny valve covers with drippers since it's a CE block. Biggest ticket item to fix in the engine bay: swap the repro booster & MC with the originals that I've got in a box and need to send out for restoration.

First fun project from this summer was to pull the diff cover to check the gears. As I suspected after counting driveshaft revolutions with the wheels up, sure enough this is a 4.56:1 gearset inside the original BV (4.10) housing Looks like "Zoom" gears from the stamping "41 x 9 PHT 3093" (which I believe is Perfection Hy-Test). This Z was originally bought in Harvard, Il, and later restored in Chicago, so I wonder if the owner went with Zoom gears since they were local (Harvey, Il, at the time) or just because they're awesome

Name:  IMG_0118.jpg
Views: 906
Size:  341.5 KB

Name:  IMG_0117.jpg
Views: 925
Size:  230.5 KB

Name:  Zoom Ad.jpg
Views: 1989
Size:  372.8 KB

Looks like the original "4-series" gear carrier, the heaviest-duty from GM which would have carried the original 4:10 set. Assembly stamp is A 23 J so Jan 23rd '69 - seems right for 02D?

Name:  IMG_0111.jpg
Views: 918
Size:  423.0 KB

I also added a posi lube tag to the diff fill plug, adding the period after "diff" to make the repro look more correct (a slight touch from a center drill to deboss then a drop of white paint). While under there I went for 2 qts of fresh Lucas 80W-90 for the posi with a new Fel-Pro gasket and 1.5 qts of fresh Sta-Lube 85W90 GL-4 for the M20.

Name:  IMG_0132.jpg
Views: 895
Size:  311.7 KB

Name:  IMG_0140.jpg
Views: 934
Size:  214.8 KB

Name:  IMG_0097.jpg
Views: 922
Size:  233.2 KB
__________________
~Matt
'69 Z/28 RS
'77 F100
'83 FJ60
'10 WC50

Last edited by cruiserofland; 10-13-2021 at 12:14 AM.
Reply With Quote
The Following 5 Users Say Thank You to cruiserofland For This Useful Post:
dykstra (10-13-2021), napa68 (10-13-2021), olredalert (06-05-2022), PeteLeathersac (10-15-2021), x77-69z28 (04-25-2023)