It looks like I'm heading down the SM465 path which has caused more questions.
It looks like there a three versions of the SM465. Will any of them work or is there a particular year that works better?
I've seen several for sale with the NP205. It looks like the NP205 doesn't have the ideal gearing compared to the Dana 300. Was hoping to skip on the SM465 adapter but that doesn't seem like a good idea. Agree?
Anything else I should be aware of when looking and purchasing a SM465?
To the OP good choice on the 465, 205s are strong tcases, the 2:1 isn't the best, you could however put in a lower gear set 3:1 ratio. That would be better than the 2.61 the D300 has, or you could get the adapter for the 465 to 300. Neither of which are cheap.
The first gear in that 465 with the 205 in low is fairly low compared to anything else that was bolted to the D300 from the factory.
UPDATE: I may end up going down the T18 path after all. After crunching some numbers between the T18 and SM465 it really seems to come down to availability and price. Below are the options I considered. When you include adapters, bell housings, and the price of the transmission, the prices seemed to be within $200-300 of one another.
T18/ Dana 300- crawl ratio: 72.25. I found one that is rebuilt and at a decent price. This seems to be a good alternative.
SM465/ Dana 300- crawl ratio: 64.68. Have not found a rebuilt SM465 with Dana 300 output. Good alternative if I find one in my area.
T18/ Dana 20- crawl ratio: 56.2. Really want to stick with my Dana 300
SM465/ NP205- crawl ratio: concerned that with my gears (3.54) and the stock Dana 300 this ratio may be too low.
Just be done with it. Shell out the $$$ for the NV4500 & Atlas !
Or the 4L60E/4L80E for the auto
Never a worry again on breakage!
The 205 is a strong case, But it's huge, And as said above the low sucks!
Hope you don't do any kind of speed shifting behind that LS1,
The T18 & SM465 are no speedy shifting transmissions.
If you go with the T18 go with a Ford T18, If you can get access to a lathe to turn down the bearing retainer, The Ford is very easy and cheep to mate to a GM bellhousing and the transferrcase adaptor will come with the right mainshaft.
How do you drive your Jeep? Do you like to run through the gears and use the power? Although I like the T18, and I have one in the 5, it is not a fast-shifting tranny. Neither is either of the SMs. They're GREAT trannies, but they are truck trannies. That may not be a concern... just throwing it out there. Check out Novak's site and see what they say about all the choices, then choose what you like.
__________________ Kerrdog Go Fish! <*////><
But the right word at the right time... "Hey, give me a little hug!" That's the difference between lightning and a harmless lightning bug!