Dana "super 18" transfer case?
A few time now I've heard it mentioned, but can't find any information on doing it. From what I understand, this may be just what I am looking for.
I am looking to replace my Quadratrac, but want to keep my TH400.
I found a TH400 mated to a Dana 20 from a Commando.
The problem is that I want to use the off set ,and much lower output of a Dana 18. Not to mention the lower low range.
Finding a 4" bore input D18 to bolt up in place of the D20 is turning out to be a lesson in futility.(I could imagine expensive if I do) The guy the has the TH400/D20 combo has about every other D18 made BUT the 4" bore.
He told me he's heard about putting the guts of a D18 into the D20, but said he has never actually done it. He just heard it could be done.
And information on which D18 I would need to do this ,if possible???
I could get the 400/D20 and a D18 all for $350.
I'm not finding any information on actually doing it.
Final Civilian, 1966-1971
The "large case" version of the Dana 18 was the most improved version of all. It was only found behind the Buick V6 engine with its T86 and T14 transmissions. The case casting used was that from the Dana 18's progenitor, the Dana Spicer Model 20. This case featured a 4" locating bore and a single stick shifter and new front output cap. The front output assembly did not provision for a shifter mounting point, as the shifter was anchored to a transmission bracket. The internals were essentially identical with the standard Dana 18. This version is best thought of as Dana 18 guts in a Dana 20 shell. Individuals can build a "Super 18" by copying this version.
78 CJ7.. 258.. TH400/Dana18.. SOA/stock YJ springs.. 35" General Grabbers.. Waggy 44s.. 4.88 gears...Spartan/Lockright...Fiberglass front to rear