called and confirmed today about timing... they have a back order of 600 t-cases @ advanced adapters. JBConversions has a 10 week wait for 4:1 gears....
I am getting a lower 1st gear with the NV4500, so perhaps wait on the 4:1 conversion and simply fix what I've got.... but put the nv4500 in (there is still the issue with the throwout bearing that requires the transmission to come out again... benefit is if I do go with AA later, the Dana 300 has all the upgrades and is more valuable....
it seems like a simple decision. Rebuilding the D300 transfer case (it's making a noise like an intermediate bearing is gone). Then adapting it to the NV4500... So here it goes. Rebuild kit with bearings $280, 4:1 gearset $750 (but it may not be available from any manufacturer now), 32 spline upgrade to forward driveshaft ($300), billet cover to fix the leaking one $120. Adapter from the NV4500 to the D300 $450 or $750. Benefit is the transfer case is shorter than the Atlas (and for rear driveshafts, this is very important). In either case, I need to modify the driveshafts so it's a wash.
v.
Atlas 2 - which takes 12 weeks to get and I get 4.3:1 or 5:1 low range
If I do the atlas, and sell the setup I have now, I might get $500 for all of it so $1900 v. $2200 (but even so, I'm only about 20% sure I could sell it)....
In other news, the NV4500 is 2" shorter than the current set up and will fit vertically
Last edited by SuperBuickGuy; February 21, 2021, 10:59 PM.
Not thrilled with the packing job - I joked with my friend that I add insult to his generosity of allowing it be delivered to his shop by spilling oil all over the floor.
She's a big girl - so I'm still questing whether or not I may just go with the 4l60e (bonus is no adapter is necessary), or I'll engineer this in place. Even if I don't put this in the '40, there is another project coming soon where a 5 speed would be primo.... we will see.....
So I've decided... the new-to-me AW5 is making noises, and I have a couple dollars so time to upgrade to the NV4500 and Atlas t-case... this will take awhile, though, because it's a 12 week lead time for a t-case. And between now and then I'll continue to drive it until it breaks.
Last edited by SuperBuickGuy; February 10, 2021, 08:58 AM.
Epilogue.......
I also pack a "Off Road Field Service Tent" on the hauling trailer for at the Base Camp.
as in these pix, first is at the job "Man Camp" replacing said fan clutch on a Sunday off
. Others from Off Road Rallies.
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