: TF727 between 304 & D20 in CJ-7


cj7zrcool
08-25-2006, 07:55 AM
A friend of mine is trying to sell his Jeep, a 79 CJ-7 with a 304/T18A/Dana 20, to a guy that is wanting to swap the manual T-18A transmission for a TF727 automatic out of an '86 Wagoneer that had a 360 & 229 t/case. Has anyone on the board done this? What are the pitfalls of this swap and what will be required in the way of adapters or other parts?

YME
08-26-2006, 09:17 AM
The two biggest pitfalls I see right off are going to be connecting the transfer case to the tranmission and finding a flex plate. The D20 has a different bolt pattern and a bull gear while the 727 will have a standard 6 bolt pattern on the back.

The 304 never had a 727 behind it in any Jeep application that I know about so there isn't a factory flex plate that will work. AMC might have used the 304/727 combo, so you may need to start scrounging through books to see if there is a flexplate that will fit.

bjb
08-26-2006, 03:47 PM
No problem with the flex plate any 304 - TF combo will work. The probem is the transfer case - transmission combo. Either get a jeep TH 400 - dana 20 combo or a 727 - dana 300 combo. The 727/20 combo will have front driveline issues and the TH 400/20 combo will get alittle long. While I'm an auto fan the T18/20 combo is a pretty good set up. I'd put my money in axles frist.:smokin: