1985 AMC Eagle wagon build

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The Dark Side of Will
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Re: 1985 AMC Eagle wagon build

Post by The Dark Side of Will » Fri Nov 03, 2017 2:07 pm

Dorked around with this a bit today. My dad had the engine on the chain fall instead of the engine stand. I was able to play with the Jeep exhaust pipe. I think I'll have to tweak the diff snout bracket a bit, as well as install the O2 sensor somewhere else.
This downpipe is so difficult to get into place that it's going to have to be a part of the powertrain assembly when it goes into the car.


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Re: 1985 AMC Eagle wagon build

Post by The Dark Side of Will » Tue Dec 05, 2017 4:08 pm

The Dorman PN for Jeep 4.0 flywheel bolts did not have the correct parts. The Dorman kit has 7/16-20 bolts, while the real deal is 1/2-20.

NO ONE MAKES JEEP 4.0 FLYWHEEL BOLTS. WTF?

No one except ARP. ARP's kit on order for a few times what a kit of normal bolts would cost. I don't know why this is a weird thing. Does no one else build manual transmission 4.0 drivelines? I'd rather not dork around with facing the heads of standard grade 8 bolts down... just get the part that's made for the job and move on.

My dad is putting an (old) LT1 in an Eagle. I'm working with him to get the mechanicals for that car done so we can get it out of the F@#%ing garage.
We set the engine up relative to the extra crossmember today. I know how I need to make the mount adapter plates.

Here is some basic information to support design of those plates:
https://www.diyautotune.com/support/tec ... templates/

http://www.hotrodders.com/forum/chevy-m ... post276323

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Re: 1985 AMC Eagle wagon build

Post by The Dark Side of Will » Tue Dec 12, 2017 1:36 pm

SLOWLY getting everything together. I had to order some shims from McMaster to get the output shaft end play correct. Those are in and the measurement looks good relative to spec. Spec is 0.003 to 0.012, with a target of .006. This ended up at 0.003, so I'm happy. Pulling a 0.005 shim would have resulted in 0.008, so whatev.

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Need to install the shaft seal in the tailshaft housing, then break out the anaerobic goo and do the final installation. I have a new rubber splined sealing washer to go on the end of the shaft, after which I can install the yoke and declare that the rear output is complete.

I have a seal for the front output... I should probably just pull the front yoke and install it, but it's not nearly as easy as the rear yoke. It'll be way harder in the car, so on the bench if the obvious place to do it.

I'm deciding whether or not I want to yank the stock vent fitting and tap it for a pipe fitting (and then to A/N plumbing?). It already rotates while installed, so the sealing of the fitting to the tailshaft housing is questionable at best.

Edit: testing fixing images

I'm going to run all the vents from all four gearboxes (trans, T-case, front diff & rear axle) to the PCV system so that I can ford modest water crossings without worry. The road to a friend's house flooded more than I'm comfortable fording in a Fiero a few years back, so I want to be sure an event like that doesn't stop me again.

All Eagles (& a lot of Jeeps?) use a 36 tooth speedometer gear with 3.54 axle ratio. My dad found a guy who had one and bought it. I will probably use a DRAC or the JagsThatRun VSS adapter to provide a VSS signal to the ECU, while retaining the mechanical speedo, for now. I'd like to swap to an electronic speedometer eventually, but the Eagle instrument panel is really hard to remove, so that has to be more carefully considered.

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Re: 1985 AMC Eagle wagon build

Post by The Dark Side of Will » Sat Dec 23, 2017 4:19 pm

Found all the case half and tail housing bolts and torqued up the tail housing. The torque spec is 23 ftlbs. I used Loctite 518 anaerobic sealant.

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The vent connection is loose. I'm not sure whether to try to seal it back up, or to pull it out and tap the hole for 1/8 NPT. I will plumb all of the vents (trans, T-case, front diff, rear axle) to the PCV system so that I don't get water inside those units if I ford a stream.

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At this point I just need to install a new sealing washer on the end of the output shaft and install the yoke. Then I need to pull the front yoke to replace the seal and sealing washer and it'll be all good.

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Re: 1985 AMC Eagle wagon build

Post by The Dark Side of Will » Thu Feb 01, 2018 8:53 pm

Being originally from an automatic vehicle, my engine did not have the pilot bearing carrier pressed into the back of the crank. A pilot bearing and carrier came with my clutch kit, so I tried to install it... no dice. The micrometer said that the bore in the crank was 1.8138 while the OD of the carrier was 1.8158. Holy balls Batman, a 0.002 interference on a diameter less than 2"? WTF? That ain't going in without a ten ton press.

I used the brake hone trick again to enlarge the crank bore to 1.8140... and wore out a set of stones. That wasn't going to be productive, so I had a machinist friend turn the pilot bearing carrier down to 1.8145. The result was that the pilot bearing carrier was down from 0.002 interference to 0.0005. It tapped in lightly and seated.

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