Tell me about the jeep I just brought home - JeepForum.com
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post #1 of 96 Old 09-11-2019, 06:17 PM Thread Starter
jchal3
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Tell me about the jeep I just brought home

Well I finally pulled the trigger on a CJ7 rebuild project. I did some research before I started, but I'm really totally new to this. I have owned 2 other jeeps, but never actually worked on them.....this one is a restore project, and a bucket list item for me.....thing is, I have no idea where to start really.

So can you guys help me out on what I'm looking at and where to go next?.

What I know:
It is a 1981 CJ7. With an AMC 304 V8. it has an AMC 20 rear end. I think it is a T150 3speed from what I can tell on the novak site. I'll post pics of the tranny if someone can confirm what it is. I took pictures of the transfer case, if someone can identify it that would be great, and I have no idea about the front axles. It also needs a carb.

One big question I have is this...Is there any way to find out what this jeep was originally? What did it look like coming off the lot??

I know it's a lot of questions, thanks for the help..

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post #2 of 96 Old 09-11-2019, 07:04 PM
BagusJeep
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Looks like a T15 and dana 20 transfer case. Both are pretty stout but were not offerred in 1981.

The 304 could be non-original. Have you found the date stamps on the inlet manifold casting? i am guessing late 70s to 1981 because I can just about see a Duraspark ignition. Are you sure it is a 304? There are raised numbers on the side of the block with the displacement. Common to put in a 360 from a Wagoneer.

Here are some basic diff cover pictures. You could figure the front one, should be Dana 30 but those wheels are a long way out. Do you have a pic of front of that axle? the driveshaft is missing which often means either the axle is bust or that it has a different ratio to rear, so before you hook it up you need to go inside each axle and check the exact number of teeth on the rings and pinions.

The stock carb is an MC2100, a well known and generally reliable motorcraft product. Try eBay for NOS or rebuilt, cheap new clones are rarely completely satisfactory. Looks like you have on on there already, can it be rebuilt? (Kits are $20 plus carb cleaner). If it came without an air filter, worth looking for a stock air cleaner.

If you post up the VIN plate we could have a go at deciphering it for engine and tranny, exact trim level is not listed there as many items were a dealer fit but there is data to be gleaned. The black mirrors suggest a low spec. More pics required
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1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #3 of 96 Old 09-11-2019, 07:26 PM Thread Starter
jchal3
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Good deal...thanks I'll get the vinegar posted tomorrow.... I was told the front drive shaft was put as part of a quick reassembly to move...the shaft in in the trunk haha. I know the engine is not stock, but I dont know about the rest.

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post #4 of 96 Old 09-11-2019, 07:29 PM Thread Starter
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So this may be dumb, but is the VIN up by the windshield??

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post #5 of 96 Old 09-11-2019, 07:31 PM Thread Starter
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And you are saying to pull off the front and rear differential covers and check the gear ratio correct??

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post #6 of 96 Old 09-11-2019, 07:36 PM
Bmann412
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The data plate should be below and to the right of the brake booster on the firewall

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post #7 of 96 Old 09-11-2019, 07:40 PM Thread Starter
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No brake booster on this one....at least I dont think, but I'll give a good look around the firewall

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post #8 of 96 Old 09-11-2019, 07:40 PM
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You have some good parts on there and if the tub and frame are rust free, it is a good basis for a project. Fortunately easy to work on and a lot of parts out there, just getting more expensive.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #9 of 96 Old 09-11-2019, 07:45 PM Thread Starter
jchal3
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Well I know it needs a carb and an axle..at least I've been told it needs an axle....from my research it looks like it needs around 470 cfm. But I know nothing about these things haha.

The frame is rust free except for one little bubbling spot. The tub has has some repair done, but ultimately has been skim coated with bondo. I dont know if this is a normal practice, or if the po was just doing his best....overall though no real rust.

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post #10 of 96 Old 09-11-2019, 07:49 PM
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Quote:
Originally Posted by jchal3 View Post
And you are saying to pull off the front and rear differential covers and check the gear ratio correct??
Yes, you should find stamped on the ring the number of teeth on the ring and pinion (divide to get ratio). Otherwise count them, this is the only foolproof way. It also lets you see any chipped or worn teeth. I got a J20 with a disconnected front axle and found 5 teeth broken.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #11 of 96 Old 09-11-2019, 07:51 PM Thread Starter
jchal3
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Quote:
Originally Posted by BagusJeep View Post
Yes, you should find stamped on the ring the number of teeth on the ring and pinion (divide to get ratio). Otherwise count them, this is the only foolproof way. It also lets you see any chipped or worn teeth. I got a J20 with a disconnected front axle and found 5 teeth broken.
Got it...the gear ratio front and back have to match correct? Or else one will blow apart.

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post #12 of 96 Old 09-11-2019, 07:54 PM
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Quote:
Originally Posted by jchal3 View Post
Well I know it needs a carb and an axle..at least I've been told it needs an axle....from my research it looks like it needs around 470 cfm. But I know nothing about these things haha.

The frame is rust free except for one little bubbling spot. The tub has has some repair done, but ultimately has been skim coated with bondo. I dont know if this is a normal practice, or if the po was just doing his best....overall though no real rust.

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Tubs usually have more rust than you can see, Bondo is normal in refinishing, but 1/2" or more is not. Only way to know is to strip it, they are quite easy to weld and some repair sections exist or even whole tubs. Last one I stripped had worrying bondo but underneath was great.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #13 of 96 Old 09-11-2019, 07:57 PM Thread Starter
jchal3
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Quote:
Originally Posted by BagusJeep View Post
Tubs usually have more rust than you can see, Bondo is normal in refinishing, but 1/2" or more is not. Only way to know is to strip it, they are quite easy to weld and some repair sections exist or even whole tubs. Last one I stripped had worrying bondo but underneath was great.
The po's story is he welded in all new floor pans, and rockers. I am planning on stripping it off. I want to get that axle and carb worked out though so I can at least put it on the road a little.

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post #14 of 96 Old 09-11-2019, 09:21 PM
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If you have a working rear axle it will run on highway, just a bit limited off road. Put it in 2 HI and it will work just fine. I see plenty of CJs with dodgy conversions running round in 2WD.

The carb is a relatively small task. I am time limited so I put a cheap $70 clone carb on my J20 so I can drive it whilst I find the time to do it properly.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #15 of 96 Old 09-11-2019, 09:51 PM
BagusJeep
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Quote:
Originally Posted by jchal3 View Post
The po's story is he welded in all new floor pans, and rockers. I am planning on stripping it off. I want to get that axle and carb worked out though so I can at least put it on the road a little.

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it has had rust, typical of 1981. The windshield frame behind the hinges is a key spot, that one has been replaced (they are quite cheap) but the rust can also be behind the lower part of the windshield hinge just above the cowl.

Other place to check is below the roll bar mounts, they were not painted at the factory until after the roll bar was mounted. Most 1981 will have had repairs in this area.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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