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Quick super-newb question. I searched a bunch but found lots of conflicting info regarding this...hard to discern who is right and who is wrong. And almost all T18-into-CJ swaps are done with Ford T18's, not sure if those were different than the CJ T18's?
Buddy of mine just got an '84 CJ7. At some point in the Jeep's life it got a 360 mated to a T14 and Dana 20. The 360 has some sort of [aftermarket] cam (nothing too wild, maybe an RV cam or something), nice aftermarket carb, HEI etc...thing runs freaking awesome, even stone cold it starts on the first crank. I honestly didnt know it was even possible for a carb'd engine to run this well.
No idea what year the 360 is...im a GM guy so I have no idea how to date 360s.
Soon after he bought it, we found out the tranny was junk. 2nd gear was basically more noise than it was forward motion...
We yanked it out (I dont think ive ever seen such a compact light-weight tranny? The D20 weighed more than the trans did) and pulled it apart...2nd gear teeth were completely munched off.
Figured it was a perfect excuse to upgrade to a better trans with better gearing.
We found a T18 out of a CJ locally on craigs list. The guy said it was out of a '79 CJ7 with a 304. It has the granny 6.32:1(?) first gear and reverse is "up and to the left". It looked brand new (painted and everything) so we grabbed it. Oh and it was all of 200 bucks, with a Dana 20 still bolted on the back. :flipoff2:
After getting it back to the shop, it seems the input shaft is slightly smaller in diameter than the T14. The input shaft seems to stick out from the bellhousing basically the same amount as the T14 (measured with a straight-edge across the bellhousing) BUT the main difference is that the pilot shaft snout is "longer", before the splines start...if that makes sense.
So I assume we'll need a different pilot bushing for the crank. I looked on Novak's website and it seems theres a bunch of different pilot bushings available, but im not sure which one to use with the 360...ideas?
Also, im not sure what clutch to use. Obviously the existing clutch wont work because the input diameter difference. Any ideas there? I dont know how similar the 304 and the 360 are...would a clutch from a 304-powered CJ be the right one to use? Or maybe a clutch from a J-truck that had a 360 mated to a T18 from the factory???
Basically the only thing I know is that there is some difference in the 304-360 flywheels and balancing...so we should keep the original 360 flywheel on there.
The rest of the stuff is easy, make a custom crossmember or space the stock one down, shorten the rear driveshaft a bit, etc... Just not sure what to do about the clutch and pilot bushing.
thanks
Ben
Buddy of mine just got an '84 CJ7. At some point in the Jeep's life it got a 360 mated to a T14 and Dana 20. The 360 has some sort of [aftermarket] cam (nothing too wild, maybe an RV cam or something), nice aftermarket carb, HEI etc...thing runs freaking awesome, even stone cold it starts on the first crank. I honestly didnt know it was even possible for a carb'd engine to run this well.
No idea what year the 360 is...im a GM guy so I have no idea how to date 360s.
Soon after he bought it, we found out the tranny was junk. 2nd gear was basically more noise than it was forward motion...
We yanked it out (I dont think ive ever seen such a compact light-weight tranny? The D20 weighed more than the trans did) and pulled it apart...2nd gear teeth were completely munched off.
Figured it was a perfect excuse to upgrade to a better trans with better gearing.
We found a T18 out of a CJ locally on craigs list. The guy said it was out of a '79 CJ7 with a 304. It has the granny 6.32:1(?) first gear and reverse is "up and to the left". It looked brand new (painted and everything) so we grabbed it. Oh and it was all of 200 bucks, with a Dana 20 still bolted on the back. :flipoff2:
After getting it back to the shop, it seems the input shaft is slightly smaller in diameter than the T14. The input shaft seems to stick out from the bellhousing basically the same amount as the T14 (measured with a straight-edge across the bellhousing) BUT the main difference is that the pilot shaft snout is "longer", before the splines start...if that makes sense.
So I assume we'll need a different pilot bushing for the crank. I looked on Novak's website and it seems theres a bunch of different pilot bushings available, but im not sure which one to use with the 360...ideas?
Also, im not sure what clutch to use. Obviously the existing clutch wont work because the input diameter difference. Any ideas there? I dont know how similar the 304 and the 360 are...would a clutch from a 304-powered CJ be the right one to use? Or maybe a clutch from a J-truck that had a 360 mated to a T18 from the factory???
Basically the only thing I know is that there is some difference in the 304-360 flywheels and balancing...so we should keep the original 360 flywheel on there.
The rest of the stuff is easy, make a custom crossmember or space the stock one down, shorten the rear driveshaft a bit, etc... Just not sure what to do about the clutch and pilot bushing.
thanks
Ben