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Unread 01-30-2014, 04:32 AM   #1
gunsmokex
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1979 CJ5 
 
Join Date: May 2007
Location: South Dakota
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Thoughts and opinions the right motor, trans, transfer case combination

Hello everyone been a while since I have posted on here but I need a bit of advice or rather everyone's opinion if they don't mind sharing.

I have a '79 CJ-5 an '80 CJ-5 and a 74 Wagoneer. Yes I am a Jeep hoarder, particularily CJ's

Anyway the '79 has a 258 and I am replacing the two piece AMC 20 axles with one piece axles and have to do a rewire job on it and hopefully it'll run like it did before I parked in the garage.

Now here's where I need your advice for my baby the '80 CJ-5 the '79 I just want to get it running and drive it for a bit but everything from all 3 Jeeps is sacrificable for the '80 CJ-5.

#1 Motor

choice a 283 small block Chevy came out of an early 60's GMC 4WD pickup (I have the bellhousing to match my '80 tranny to the SB Chevy)

choice b AMC 360 out of the '74 Wagoneer

choice c buy a chevy sb 350

#2 Transmission

choice a my t-176 out of the '80 for which I have the chevy SB bellhousing for

choice b the 3 spd T-150 out of the '79 (this route I'd probably have to use the AMC 360)

choice c the TH-400 out of the Wagoneer (i'm just putting this out there, I'd rather go manual plus I don't want to mess with the driveshafts too much)

#3 Transfer case

choice a Dana 300 out of the '80 CJ-5

choice b Dana 20 out of the '79 CJ-5

choice c the chaindrive quadratrac out of the Wagoneer

#4 Axles

choice a AMC model 20 rear and Dana 30 front

choice b transplant the Dana 44 front and rear axles from the Wagoneer under the 80 CJ-5

Anyways lots of choices I've decided this is the year that I get my Jeeps done, I'm starting with the '79 and I'm going to go from there.

What I'm thinking is going with the 283 since I own it and don't have to buy another one, just have to go through it once since I did rebuild it once a long long time ago, recheck the bearing and regrease everything. Go with the T-176 tranny although I hear the the T-150's hold up a little better it is nice to have 4 spd vs 3 spd. Mate that to the Dana-300 which IMO is unstoppable and hands down the best trans case built bar none. Stick with my stock axles to begin with and eventually swap in the Dana 44's.

Mind you the frame is in perfect condition on the '80 CJ but the body is not lol. Anyways I'm excited to get started on it going to dig into the AMC model 20 rear soon, hopefully it'll warm up some here in South Dakota.

Any opinions you guys have feel free to share or any questions you might have or weird and strange ideas.

I plan on using this Jeep as a daily driver, I will be doing a life on it eventually and plan on around 35's or 36's, just general terrain. Not many rocks for climbling where I live, occasionally mud, just an all around Jeep mainly.

Thanks

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Unread 01-30-2014, 05:11 AM   #2
dg6772
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1986 CJ7 
 
Join Date: Feb 2011
Location: Muskegon, Michigan
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I like the sbc 283 idea. I would ( and did) contemplate putting a tbi on it. I have a tbi 350 in mine and love it.

Axles......??? Here's what I know. Your planning on using your cj as we use ours here and the d20 with solid shafts has served us well.

Trans....I'm happy with my 700R4 mated to a d300. I average 17+ mpg from it with 4.10's and 33's. Off-roading here is pretty light compared to most. Too far to go too get serious. But once in a while I plan to.

Good luck! Take lots of photos!!!

Dave in Muskegon using JeepForum
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Unread 01-30-2014, 06:15 AM   #3
gunsmokex
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Join Date: May 2007
Location: South Dakota
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Funny you mention TBI, I just happen to have a '92 Firebird lying around with a TBI, I knew I kept it for some reason . Hmm how much work was the TBI vs. just going with a carburated system?
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Unread 01-30-2014, 06:26 AM   #4
dg6772
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It took a bit,mostly because I didn't fully understand the system. There is some great info on (binderplanet.com). I chose the tbi from an early 90 pickup because of its simplicity. I got the tbi, wiring and the computer for 25.00 from a local yard. For a fuel pump I chose to use the factory pump added the cj sending unit in a 1986 plastic 20gal tank. It only took a couple of hours put together. So far I have 3500 miles on this set up and its working fine.

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Unread 01-30-2014, 08:46 AM   #5
CSP
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An auto in a CJ5 is going to leave you with nothing for a rear driveshaft.
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Unread 01-30-2014, 09:18 AM   #6
Knucklehead
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Quote:
Originally Posted by CSP View Post
An auto in a CJ5 is going to leave you with nothing for a rear driveshaft.
Particularly if you plan on lifting it to add larger tires in the future.
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'45 Ford GPW; '73 CJ5, 350/NP435/D20 w/Terlow gears, locked D30/D44; '13 CJ8, 304/T150/D20/D30/AMC20 w/locker and limited slip (T18 and Teralow gears in future); '88 Dodge RC, 360/NP435/NP205/D60s
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Unread 01-30-2014, 10:14 AM   #7
only in a jeep cj
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You need to say what or how the Jeep is to be used. If its 90 % on the road, Id say KISS and use the better CJ body/frame, 258, re wire it, T 176, dana 300, stock axles with the 1 piece shafts, stock tires and call it done. If its for trail/rocks, Id go 360/ T176/300 with waggy front and another waggy centered rear (that one you have should be offset rear) and sell all the left over to buy a TBI for the 360, gears and tires. Either way, there really isn't the right amount of room for an auto in a 5. AND having 3 Jeeps doesn't make you a Jeep hoarder.....I have 9 right now and had more....trying to downsize.
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1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
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Unread 01-30-2014, 10:51 AM   #8
Knucklehead
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If you have no emotional attachment to the Wagoneer I'd sacrifice its 360 to the '80 CJ5 build in a heartbeat. Combined with your current T176 and D300 and upgraded D30/AMC20 axles (with new gears, 1 piece axle shafts etc) would make a solid, reliable drivetrain for a local roads/moderate wheeling vehicle. It would also give you some time to do something with (and find another rear) Wagoneer axles to prepare for easy, transplant into the '80 CJ if you decide to go that route in the future. TH400/Quadratrac is too long to consider for a lifted CJ5 - squirrel them away for another project or sell to another Jeep nut to fund your current projects. Put the SB Chevy bellhousing up on the shelf for the future.
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'45 Ford GPW; '73 CJ5, 350/NP435/D20 w/Terlow gears, locked D30/D44; '13 CJ8, 304/T150/D20/D30/AMC20 w/locker and limited slip (T18 and Teralow gears in future); '88 Dodge RC, 360/NP435/NP205/D60s
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Unread 02-08-2014, 02:24 AM   #9
gunsmokex
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Leaving the '79 stock w/ the 258, fixing the wiring and one piece rear axle.

The '80 I'm going with the 283 sbc mainly for the fact on the cost of parts alone and the fact I can always swap in a different sbc at a later time if needed. I like the fact its a higher revving motor which will be great on the highway. Plenty more torque and hp than the 258 so I'll be plenty happy. I'm going carburated just a simple 2bbl to start and then will go from there.

1st things 1st though gotta get the '79 axle done, now if it'd only warm up a bit outside I'd be much happier. It was 10^f outside earlier yesterday and it actually felt nice lol.

Someone asked what I'd be doing with it, but as I said already it'll be a daily driver. There isn't much for rocks around here, occasionally there is some mud but nothing like you southern boys have. Lots of pasture grasslands around here some gravel pits and thats about it. Just a good all around Jeep that is ready for anything. I guess the one thing I can always count on living up here though is snow.
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Unread 02-08-2014, 07:34 AM   #10
jp360cj
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Since you already have the sbc bellhousing for the T176. of your axle choices, I would keep the stockers for now. The waggy front would be a good upgrade, but you'd have to get a centered rear of similar width.
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Unread 02-08-2014, 07:51 AM   #11
jeepdaddy2000
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Quote:
You need to say what or how the Jeep is to be used.
This should be the start for all builds and modifications. The answer to this question drives everything from engine selection to gearing. Many times "getting it right" is much easier than you think.
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