Mike's Rear V6 3rd Gets A Harrop/Cryo/456 Nitro Gears
(55 BIG pics loading)
DEC 20 2016

2 boxes received from Mike. The yellow bands are a nice touch. One is the rear and one is the front.
Well wrapped. The grey foam was the greatest cushion for the 3rd.
Michael's gear package product was also received from Just Differentials.
Both of his Harrop elockers also arrived. Not a big fan of that electro-static popcorn stuff.
These pics are also in the other main link. The 8" rear gears are in the group of 4. The gear in the lower right was a walk-in and is a Dana 60.
Cryogenics International is 30 miles from me but worth driving the distance.
Charles(owner) fabricates and sells these cryo chambers to numerous places....and overseas, too.
The brainbox....computer controlled interface between the LN2 line and the chamber itself.
488 Nitro back from cryo and his "old" 373 gears ready to go under the knife.
Being an 07 model and being that Mike lives in sunny California, it's just plain nice to work on a relatively clean, rust free 3rd. Skipped a few steps but here is the 373 pinion being pressed out.
This specialized seal tool easily removes the seal with maximum damage.
Original pinion races are pressed out.
The big inner pinion race is usually stubborn about staying straight.....
.....but it can be done.
Maybe it's the accessability but the outer race taps down very nicely.
100% seated.
Going to try a typical .080" shim for the 1st try.
It's only a 12 ton but it's never let me down.
Time to mount up the ring....but first to check for any burrs or rough spots. All looked great.
Blue loctite and 70 ft/lb on all 10 bolts.
Carrier bearings are pressed on.
This end is all done.
Now to mount up the pinion into the 3rd.
Ready for the Harrop.
The 2 tabs interfere with the top bearing cap.
Just bend them a little to clear better.
And the cap fits properly. The wheel adjuster is the last thing to install by screwing it in.
Backlash is dialed in.
Drive side....pattern is good but slightly shallow.
Coast.
Drive...reverse painted. Agrees on the slight shallow.
Coast....reverse painted.
Comet tail is tucked in.
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The usual disassembly and pressing the bearing off.
Only added .002" to the pinion depth shim and pattern is very good.
Coast even looks better.
Now to install the solid collar.
It took 4 tries but the collar is now properly shimmed. 1.865" final
The rubberized seal can be tapped on.
A thin coating of gear oil on all rubbing surfaces.
Final preload checked in at a nice 12 in/lb.
The play in the tabs was measured at 2 mm per the spec.
70 ft/lb on the 4 bearing caps.
20 inch/pounds for total preload....carrier bearing plus pinion bearings.
Backlash was measured on 20 teeth....every other tooth. .007"
10 ft/lb and blue.
Final locker test. 2.94 amps. All looks good.
Dremel drill the data on the ring.
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Have to find some more of this dense 2" foam....seems to really cushion the 3rd.