I have just bought a jeep project and it has a t18-1b transmission with the 6:32 low gear. What are your thoughts on this transmission? Pros vs Cons if any? I have been told that its a tuff transmission.
Amc produced an astonishing 13 different t-18 tranissions. The golden egg you seek is a 76-79 cj7 t-18 or a swap from a ford truck. I just finished a np435 because almost all of them are geared at 6.92/1 granny and were put in ford trucks for something like 30 years. If you already have a amc v8 then you will only need a trans case adapter and a pilot bushing. If you have am i6 you will need the bell housing as well...maybe clutch linkage as well but not certain. On the plus side the t18 may bolt straight up to your skid, I moved mine back, dropped it an inch and redrilled holes and trimmed a hair off of the front of the skid lip to fit it in. Its a pretty tall transmission. On the plus side I paid less for my np435 swap than it would've cost for a correct t-18 by itself. Also, do not get the fsj t-18 without planning on swapping the input shaft.
I installed a Jeep T18-1B in my '71. Best single mod I made to that rig over 16 years.
The tranny did need to be modified. Mine came out of a full size Cherokee, and had a ~12" input shaft. I had to replace the input shaft with a 6.5" one. Not too difficult, instructions are out on the net at various places.
I suggest you look at Parts Mike as a source for anything you need for your T18 installation. Parts Mike has been doing/providing parts for T18 swaps in CJs for more than 20 years.
Also check out Novak for any adapters you may need. Look at Novak's website, click on "Knowledge Base" and read about T18 info, and how they can also help with your T18 swap, with adapters, specialty pieces, etc.
No matter how much you spend on doing this swap, once you get your rig offroad and see the difference it makes, you'll never regret it!!
EDIT: I just re-read that the T18 is part of the project you just bought. If you're lucky, it's already installed, and you can just use the souces I cited as back up for info and parts if needed...