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  • December 21, 2024, 09:52:14 PM

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Author Topic: Redo Vacuum Lines From Scratch?  (Read 479 times)

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Offline vangremlin

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Re: Redo Vacuum Lines From Scratch?
« Reply #15 on: December 19, 2024, 07:08:46 PM »
You can also lock it into 4WD without the vacuum system being operational.  Let us know if you're interested and we can walk you through it.  Good luck!
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold

Offline SpectreMkVIII

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Re: Redo Vacuum Lines From Scratch?
« Reply #16 on: December 19, 2024, 08:32:00 PM »
Permanent 4WD does sound like the simpler and more practical option, I would be interested in giving it a shot. What does it entail? Anything special?

Offline MIPS

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Re: Redo Vacuum Lines From Scratch?
« Reply #17 on: Yesterday at 12:14:58 AM »
I find with mine there's the additional driveline noise but also against the numbers that running with/without 4WD full-time doesn't notably affect MPG the engine needs a bit more throttle to accelerate.

Eagles with the front axle disconnect have a bit more vacuum routing than later models with just the actuator at the transfer case. Vacuum is ONLY needed to shift in/out and doesn't need to be present to keep it engaged/disengaged.

Offline vangremlin

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Re: Redo Vacuum Lines From Scratch?
« Reply #18 on: Yesterday at 11:30:20 AM »
Permanent 4WD does sound like the simpler and more practical option, I would be interested in giving it a shot. What does it entail? Anything special?

Shifting the transfer case is easy, you just use a 9/16 or 5/8 wrench (I can't remember which) and using the shift lever on the case move it forward into 4WD.  You can use some bailing wiring or zip ties to hold it there so it doesn't slip into false neutral. 

For the front axle, you can go the more permanent route and open up the little case on the passenger side axle and slip a hose clamp over the shaft inside to hold it engaged.  Here is a how to:

https://amceaglesden.com/guide/Front_Axle_Lock

Or I think you could run a vacuum hose directly to just to the front axle shifter and I think that should lock the front axle so it's 4WD capable.

Sorry if I'm not very good with the terminology and I may not be totally correct on some minor details but those are the basics.  If I have any wrong Den members, please help me out!

Good luck!
« Last Edit: Yesterday at 11:33:44 AM by vangremlin »
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold

Offline SpectreMkVIII

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Re: Redo Vacuum Lines From Scratch?
« Reply #19 on: Yesterday at 05:12:43 PM »
I read through the axle lock process, seems simple enough. Unfortunately it will have to wait since I just got some snow up where I am so I'll have to wait for it to settle down a bit before I decide to slide under the car and bash my knuckles against cold metal. That leaves the distributor advance, which no longer has a home. Thoughts?

Online 89 MJ

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Re: Redo Vacuum Lines From Scratch?
« Reply #20 on: Yesterday at 06:08:13 PM »
I read through the axle lock process, seems simple enough. Unfortunately it will have to wait since I just got some snow up where I am so I'll have to wait for it to settle down a bit before I decide to slide under the car and bash my knuckles against cold metal. That leaves the distributor advance, which no longer has a home. Thoughts?
That will have to be plugged in on the carburetor somewhere above the throttle blades. Anywhere below the throttle blades will not have vacuum at WOT.
1986 Eagle: 258, Auto, Chrysler 8.25 rear, 3.54 gears
1989 Jeep Comanche: 4.0, AX-15, 8.8 rear, 4.10 gears
1940 Chevy PU: 350, 700R4

Offline SpectreMkVIII

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Re: Redo Vacuum Lines From Scratch?
« Reply #21 on: Yesterday at 06:34:20 PM »
Got it, I'll see what I can find. My 2300 doesn't seem to have that many vacuum ports on it

Offline SpectreMkVIII

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Re: Redo Vacuum Lines From Scratch?
« Reply #22 on: Yesterday at 07:44:19 PM »
So, PO put a Holley 2300 on this thing, list number R1929-S. This thing came off of a 50-60s Ford V8 and has a grand total of 2 vacuum ports on it, the lower one connected to the PCV and the other is what I connected to the EGR loop. Should I tee off the EGR line and hook in the advance to it?

Online 89 MJ

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Re: Redo Vacuum Lines From Scratch?
« Reply #23 on: Yesterday at 07:50:31 PM »
I'm thinking that I would move the EGR vacuum port to the intake manifold (actually I'd get rid of the EGR, but you might want or need to keep the EGR) and plug the vacuum advance vacuum line to the spot on the carb.
1986 Eagle: 258, Auto, Chrysler 8.25 rear, 3.54 gears
1989 Jeep Comanche: 4.0, AX-15, 8.8 rear, 4.10 gears
1940 Chevy PU: 350, 700R4

Offline SpectreMkVIII

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Re: Redo Vacuum Lines From Scratch?
« Reply #24 on: Yesterday at 08:00:26 PM »
And undo all of my hard (not at all) work so far? Kidding, of course. I can do without the EGR stuff, I'm sure it'll be fine.Thanks everyone for the help so far!

 

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