1. Home
  2. Jeep and Willys (new and old)
  3. Dana 20 to Dana 300 swap in a CJ-7

Dana 20 to Dana 300 swap in a CJ-7

Group,

Has anyone done this? I know I will have to get a different adapter to mate the 300 to the GM TH350 auto, but what about the driveshafts? Will I have to deal with changing the length? What else?

I am doing this not because the Dana 20 is bad or weak, but because the 300 has a 2.62:1 low range, and I can probably do this for less $ than going to teralow gears. I can go to a twin stick as well.

Thanks,

RR

Reply to
Red Racer
Loading thread data ...

Reply to
Red Racer

Reply to
L.W.(ßill)

Bill,

I am not sure as well. It is a 76 CJ-7 though, and think it was, but I could be wrong. In any event, it has a low range ratio that could be lower for my use, and the 300 may be my best way out of the problem without spending 4 digit dollars.

Reply to
Red Racer

My '76 CJ-7 came with the following.

258cid 6 cyl, T-150 3 spd, Dana20 Transfer case, Dana30 frt & AMC20 rear. I swapped in the T176 4 spd w/Dana300. It was a direct fit but needed a new front driveshaft. I think the rear driveshaft was okay (been many years since). o_o_o_o Best Regards, /| ,[_____], Jim, WP3JQ |¯¯¯L --O|||||||O- ()_)¯()_) ¯¯¯¯¯ )_) EM60qk 30.447439N 086.628959W
Reply to
Drink

Drink,

Thanks for the info.

Reply to
Red Racer

Gordon,

Thanks for the info. The Tera gears sound like by best option, unless I want to fuss with a swap. I think you have just made up my mind for me....

RR

don't know of any stock config with a turbo350 to dana20. AMC

J-10/J-20 trucks, the 76 CJ-7 came with an AMC turbo400 and

adapters/driveshafts for a dana300. you gain very little going to a dana300

750$-800$ -vs- 450$+ adapter, 300$driveshafts +cost of a dana300...
Reply to
Red Racer

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.