|Harrops at both ends with Nitro 488 gears for Stu's 1997 LX450|
|(48 BIG pics loading)|
|JULY 5 2019|
|This is Stu's 1997 LX450. 488 gears and Harrops at both ends will be a BIG jump in performance.|
|Basic mods are the front bumper and a 2.5" lift.|
|A heavy box with Stu's rear 3rd in it has arrived.|
| The 3rd is mounted in the fixture. JustDifferentials.com sent this "gear package kit" to me in 4 days time.|
It conveniently contains everything to do the front and rear gear installs....
both ring/pinions...both bearing kits....both solid collars....and the larger 29 spline pinion flange for the front.....
| And, last but not least, the rear Harrop elocker sent directly to me from Australia. |
I can't believe I get these things in only 3 days time to my doorstep!
God bless DHL.
|All the good stuff is layed out for the rear install.|
|Both surfaces are checked with a coarse file and all checks out fine.|
| Ring went on perfect....not too tight and definitely not too loose. All 12 ring bolts were dropped in place |
and everything was in perfect rotational alignment. I have a good eye for lining up the holes from years of practice.
|Red loctite and 81 ft/lb.|
|Tapping the carrier bearings on......|
|This portion is now complete.|
|Took my best guess and will use .056" pinion shim for the 1st try.|
|Old races welded together works well for me. I see I scribed on it 12-29-13....almost 6 years ago.|
|Now onto the pinion end of things. Pressing the pinion out.|
|New inner race......|
|....100% tapped in all the way.|
|New smaller outer race also tapped in.|
|The pinion is now mounted and the nut tightened up just enough to offer about 10~15 inch/pounds of preload.|
|Install the diff carrier and tighten the wheel adjusters to get some bearing preload while watching the backlash.|
|Tooth is painted and the result is a very nice drive side pattern.....looks super.|
|Coast looks ok.|
|And the comet tail on the pinion tooth confirms that I do not want to go any deeper....to leave it alone.|
|Says here if I go any deeper then I will be in a "too deep" condition.|
| Just got lucky on the pinion shim so now can install the solid collar. |
Many times, the collar plus shim tend to be very close to 2.135".
|Got lucky again using .0455" as the shim. Hit it right on the money.|
|Now the Marlin seal designed for the 27 spline flanges can be tapped in.|
|The Marlin seal rides in a new virgin region about .200" below the usual groove on the flange.|
|Anti-seize reduces the friction......now I can tighten the nut with less of a hernia chance.|
|A smooth 10 inch/pounds of PPL. Of course, lots of fresh oil on both bearings and the seal was well oiled too.|
| Stu has not sent me the front 8" high pinion yet.....but when he does, I'll have the rest of his product ready |
but I digress.
| So, the pinion end is complete....I also drilled the 29/64" hole for the rubber grommet.|
And now to put the diff carrier in.
| I made sure that the stop tab freeplay on the Harrop tabs was 2 mm. Backlash was set to .007" minimum.|
The preload of the carrier bearings was set to a solid 5 inch/pounds.
|The resistance of the magnetic coil checked in at the usual 3.8 ohms.|
|RTV on the rubber plug helps seal and lubricate for the push-thru.|
|Now the 12 volt test.|
|12v is applied to the magnetic coil wires. It draws less than 4 amps.|
|With 12 volts applied the grey electro-magnetic ring on the right attracts and bonds the ramp ring to the left of it.|
| Now turn the pinion which turns the ring gear(and left case portion) |
and the 3 pins are forced to move into the case as shown. Pass 12volt test.
|Data is inscribed.|
|A snapshot of the assembly notes.|