Using a Quadratrac transfer case? Pros or cons?

This is a swap I wondered about a couple of times but never attempted it. Go for it and tell us how it comes out, take pictures. Wonder where Nick has been, this would be a good time for his expert .02.

 

I hear ya' ...

Yes, the TH350 is shorter than the TH400. No, it won't bolt up. You need a special output shaft for the TH400 to QuadraTrac connection. No one makes a TH350 to QuadraTrac output shaft. There is a 700R4 to QT adapter available, but it's $500.

So, to keep within the budget and use the QT, you'd need to use the TH400. I gather it's not undoable, but probably not the easy, low-bucks path. Also, to make the TH400 work, besides the transmission, you need the pieces that are missing: the adapter and the output shaft.

For a low-bucks early CJ, it'll be tough to use a Jeep transfer case and also have an automatic transmission, IMO. Prior to 1980, Jeep used the TH400 exclusively (except for a few early wagons with Borg-Warners and single speed transfer cases). In 1980, they switched to the Chrysler Torqueflight automatics. The TF999 might fit ok, but the only passenger drop transfer case it came with was the D300, which you aren't going to get cheap or free. If you want to buy an adapter, you can use the Dana 18 or Dana 20 transfer cases behind the TH350.

The axle isn't the problem - you can get an AMC 20 from a CJ-7 with QT that has the right offset and has the right tread width. The axles from a Wagon will be wider, and although you could use them (with some welding), the wheels would stick out from the body and it wouldn't be street legal.

To me, your cheapest path is to get another AMC 20 with brakes, then use it as is, or swap parts around to get the axle you need. The AMC 20 has such a bad reputation that you can probably pick one up for less that $100. Either that, or get a centered D44 from a '72-75 CJ or Commando. Then put the V6, T15 and D20 in the Jeep.

 

Thanks! That's what I needed to hear!!

 

to use with your v6 you'll first need an AMC 400 to get the 10 spline output shaft that mates with the 1339, then you'll have to get the nailhead 400 to bolt to your engine and install the 10 spline shaft in the nailhead 400 case which requires total transmission dissassembly, and after all that you'll still need the offset rear axle unless you want to run some ridicoulously stupid u-joint angles

those look like standard 400 to 1339 adapters with lever actuated low range ( 1974 had cable actuated )

if you really want a 400 auto, find a jeepster, since jeepsters where somewhat yuppie jeeps of the day quite a few came with nailhead 400 and d20 case and would be bolt in deal

if you really want 1339 - have fun, but I don't think a 20 should be that hard for you to find