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Unread 11-02-2013, 11:52 AM   #1
JeepGuy66
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1976 J-Series Truck 
 
Join Date: Oct 2012
Location: , FL
Posts: 154
1976 J20 Build

Picked up a 1976 J20...out of state and had it shipped.

Engine rebuilt about 10k mi ago; not sure about how much time that equivalates to but tags show it has not been registered since 2010. Considering how dirty everything was I believe it was a "lot" (dirt lot) vehicle for someone.

PO said block was dipped, magnafluxed, painted purple. Yes, i said purple. Bored 10 over. New crank (although I'm wondering if it was just reconditioned), rv cam/lifters, heads done, edelbrock performer intake (non egr), 1406 carb, accel coil, mallory ignition, new gas tank, brakes, and ujoints (driveshaft), flexplate, recent tranny work, frame good, little rust, just about no rot although I think the floor boards need a little love, crappy paint. 35" tires, 4" tuff country suspension (no blocks) in back, 6" tuff country suspension up front. These are chevy springs since tuff country does not make springs for Jeep. My understnding is that the chevy springs move the axle forward a couple inches but one would never know (IMO). Thought I got a good deal considering everything that was done.

Fast forward. Got it delivered. The starter is funky, the ignition (in the column) is funky), power steering pump is funky, and the big one...transmission fluid is looks like a strawberry milkshake.

Plus it has huge front shackles; not sure what that does to the cantor.

Lets start with tranny.....

front-diagonal-sm.jpg

front-sm.jpg

left-side-sm.jpg

left-side-diagonal-sm.jpg

engine-1-sm.jpg

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1984 Grand Wagoneer
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http://www.jeepforum.com/forum/f22/1976-j20-build-1749634/
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Unread 11-02-2013, 12:04 PM   #2
JeepGuy66
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Used a wagon to catch all the drippings which worked quite well. Little to no mess on the ground.
dipstick-tube-sm.jpg

pan-removal-sm.jpg

wagon-sm.jpg

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1984 Grand Wagoneer
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http://www.jeepforum.com/forum/f22/1976-j20-build-1749634/
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Unread 11-02-2013, 12:06 PM   #3
JeepGuy66
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Ummm, where's the element inside the filter casing?
filter-sm.jpg

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Unread 11-02-2013, 12:12 PM   #4
JeepGuy66
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New filter installed, pan replaced using the rubber gasket that came in the filter kit. Read a number of places on the net not to use the kit gaskets because they leak. Wasn't sure if the tranny would be opened again because of possible water damage to the friction surfaces so i went with the cheap gasket. Torqued to about 10-15lbs in a star pattern and filled it with 8-10 qts to start. I used an $8.00 hand pump from Walmart to pump the transmission fluid into the dipstick tube. Worked surprisingly well. Very efficient and clean.

BTW. I disconnected both the supply and feed from the radiator as I suspect the water got in from there. I read the radiator bottom could be rotted and thus comprimising the oil cooling compartment. So I flushed the oil cooler section of the radiator. I expected to see green but did not. I also expected to see a leak but I did not. Perhaps the water got in from a pinhole that leaks under pressure? Anyway I have a new radiator on deck but figured I would flush tranny first and see if I could get the milkshake out.

Below is the picture of the hand pump i used to refill the tranny.
hand-pump-sm.jpg

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Unread 11-02-2013, 12:32 PM   #5
JeepGuy66
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So once I put fluid back in (8 to 10 quarts-ish) I hooked up some clear tubing to both the supply and the return lines. One to an empty bucket and one to a full gallon of new transmission fluid. I was hoping (assuming) once the engine was stared it would draw from the new bucket while dumping into the other. Unfortunately it was not drawing at all from the gallon of new fluid. I tried Park, Neutral, Drive, etc, but no luck. Does this mean my pump is DOA? I ended refilling by hand as the old flushed into the bucket. If the pump were bad would it still force the old fluid out like it did? Maybe it was just torque converter spinning that naturally forced it out? Is the pump only to bring fluid back into the transmission?

BTW. Fluid flushed out the most in PARK. I had read that the you need to put it gear in order flush but I found it didn't really make a difference. I've gone through close to 7 gallons of fluid but it is still not quite the right color. It started to rain....so, to be continued...

Comments are welcome...thanks!
2-buckets-sm.jpg

mid-flush-sm.jpg

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Unread 11-03-2013, 11:01 PM   #6
axxxgijoexxxa
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Thats a nice looking truck you got! Sucks about the problems, but should be a cool truck when you get it sorted out!
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Unread 11-04-2013, 04:52 AM   #7
JeepGuy66
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Quote:
Originally Posted by axxxgijoexxxa View Post
Thats a nice looking truck you got! Sucks about the problems, but should be a cool truck when you get it sorted out!
Thank you.
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Unread 11-04-2013, 05:16 AM   #8
JeepGuy66
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So, when was I flushing the fluid (engine running and pushing fluid out via the transmission line to radiator) I heard some weird noises; some "rattling" or "light clunking". I figured it was because the fluid got too low (couldn't fill it as fast as it was purging). So just to double check I decided to pull the pan again and just make sure there wasn't anything going on. Everything was fine but I mention this because this time I used the hand pump mentioned above to remove the fluid via the dipstick tube first. This worked GREAT. I pulled a little more than a gallon out and when I remove the transmission pan, I didn't spill a drop! Nothing oozed out like in the picture above. It was very clean other than a few residual drops from the transmission hardware itself but as far as pan spillage is concerned; nothing.

I cleaned the pan and gasket and used it again. Like many have suggested, I screwed the screws through the gasket a bit to keep everything in place and tightened the screws til they touched (just like lug nuts); constantly moving from one to other in a star pattern. Then I finished up with a torque wrench at 12-15lbs; again star pattern. We'll see if she holds.

BTW. there were no magnet(s) in the transmission pan when I removed it so I went to HD and got a couple. Wasn't exactly sure were to place them but they are in there now.
hand-pump-sm.jpg

tranny-pan-above-sm.jpg

tranny-pan-side-sm.jpg

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Unread 11-04-2013, 05:31 AM   #9
JeepGuy66
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I mentioned above I had a radiator on deck. I had ordered it from the "zone" via the website for 20% off; delivered in like three days. So this weekend I removed the radiator (still showed no signs of oil compartment being compromised). Ready to put the new one in right? Wrong? I don;t know what radiator they sent me but it wasn't the right one. Not even close. The product number on the box matched the "exact fit" number in their system but it was WAY different. So I returned it and am awaiting another one (mid week). Thinking maybe I should get my old checked out; maybe the water did not get in from the radiator if it not showing signs of leakage. Anyone thoughts?

BTW, I cleaned up the fan clutch. It was totally gunked with grease. Hard to believe that the engine was rebuilt only 10k miles ago (if the fan clutch was new when put in). Also hard to believe someone would put back a grimy clutch in a new rebuild. They took the time to paint everything including the water pump, pulley and crank pulley but put back a filthy fan and clutch? Maybe I'm just OCD.

She looks sad....
sad-face-sm.jpg

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Unread 11-04-2013, 05:34 AM   #10
JeepGuy66
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If anyone is interested, here are the specifics for the tuff country 6 inch front spring pack...
tuffcountry-front-sm.jpg

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Unread 11-04-2013, 08:03 AM   #11
Rubicon0311
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This looks like a promising build, what are your overall plans for it? Keeping it mainly stock or turning it to a wheeling rig?
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Unread 11-04-2013, 08:46 AM   #12
JeepGuy66
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Quote:
Originally Posted by Rubicon0311 View Post
This looks like a promising build, what are your overall plans for it? Keeping it mainly stock or turning it to a wheeling rig?
If I'm being honest, I think I'd like to restore it and keep it mostly on the street. It doesn't really need a whole lot. Paint exterior and reupholstered seat, dash is very good. Door panels could use some love but not much. Need to pull up vinyl floor and check out the floor boards but I think they need some love too. A bit of rot but I don't think they need replacing; we'll see. Of course some tranny work if the flush doesn't do it but most of the major mechanics are (supposed to be) done and it has good bones. Frame and rockers are excellent. Rear quarters are good. Most of the rust is on the fender flares but they are far from rotted. Good J20's are so rare I really don't want to beat the snot out of it. Technically I bought it to haul my surf gear to the beach and make runs to home depot etc. Every household needs a pickup IMO, I'm not real interested in nor can I afford a new 40K+ truck (or even a used 15K truck). So for $3200 I've got a piece of americana and I'm diggin' it!
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Unread 11-04-2013, 08:49 AM   #13
Rubicon0311
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Awesome, I think it would be pretty sweet to have a J20 to cruise around town in. Looking forward to seeing the progress.
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Unread 11-05-2013, 05:46 AM   #14
zackcj7
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Great find! I've always wanted a J truck.

Pink transmission fluid can also be from the transmission severely overheating. Did the PO tow with it?
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Unread 11-05-2013, 10:25 AM   #15
JeepGuy66
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Quote:
Originally Posted by zackcj7 View Post
Great find! I've always wanted a J truck.

Pink transmission fluid can also be from the transmission severely overheating. Did the PO tow with it?
Thanks for the info. Yes. Actually he told me the cam he put in was for towing.
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