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Glow Plug Diesel performance, modifications, tuning, and repairs.

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Old 06-13-2017, 02:45 PM   #1
AKCCF350
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Default My first 7.3L IDI - 1989 F350 Crew Cab

So, I have been looking for a 73-79 Ford Crew Cab for awhile now and they are pretty hard to come by in decent and drivable condition. I started broadening my search to Super Cabs and Crew Cabs of other years under $5k. I drove a bunch of them and then found this one down in Anchor Point and decided to drive down and look at it.

I load the family up in the RV for a fun weekend of camping and me looking at the truck. It went well and the owner agreed to drive the truck to our campsite to meet me. He showed up, we went for a test drive and for the most pate the darn truck drove extremely well. A few issues to get fixed, but the price was reasonable to me.

It's a 1989 F350 4x4 Crew Cab with the 7.3L IDI (w/ Banks Turbo) and a ZF5 Manual Transmission.

It goes down the road real well and I like it. I am now in the IDI Club.
So, three small issues. Four really, but the fourth one I knew about prior to driving to look at the truck.
1.) With a new alternator and voltage regulator, the gauge still reads real low.
2.) The transmission grinds going into 4th gear, even with double clutching.
3.) The shifter moves a lot when in 3rd gear. It jumps forward and backward depending whether or not you are accelerating or decelerating.
4.) The T-Case shifter pops out of 4x4.

I am not much on the color, it's brown, but she is pretty straight and clean.



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Old 06-13-2017, 03:59 PM   #2
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

really hard to come by esp manual trans cc
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Old 06-13-2017, 05:19 PM   #3
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

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really hard to come by esp manual trans cc
I agree. I looked for quite awhile and only found two in crew cabs, one was sold before I got back home from work.

I got a good (fair) price on the truck. By the time I fix a few things I will be right at or a little over my budget, but ok with it because it is pretty darn clean.

Between my drive back from Anchor Point and a little running around between Anchorage and Eagle River, I netted 17.14 MPG. Not bad for an old diesel with 260K miles on her. So far I'm pretty impressed.
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Old 06-14-2017, 12:42 AM   #4
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

I picked up a 91 F-Super Duty last year. I haven't put it on the road yet, but the bit I've run it, seems to do well. Real clean truck, has about 50k miles on it.

Carl has a matching truck with 12ft dump. It averages 10-12mpg, usually loaded with about 4-5 tons of wood.

I wouldn't really rely on the gauges, they aren't very accurate. Verify the voltage with a multimeter.
Example, oil pressure reads pretty low on my truck. I rigged up a temporary mechanical guage and it's fine, 50-60 psi.
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Old 06-14-2017, 07:05 AM   #5
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

Thanks Nate, duly noted on the gauges.

I have a 3G 130 Amp Alternator on the way and will be swapping out to 3/0 cables for the grounds, batteries and starter connections.

I know the old system has some issues because I drained the batteries and no output for the last 60-70 miles coming back from Anchor Point. No radio, cruise control or lights of any kind. Not a big deal, it's an easy fix.

I'll give the ol'girl some maintenance love and all should be good.
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Old 06-16-2017, 02:27 PM   #6
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

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I am not much on the color, it's brown, but she is pretty straight and clean.
Agreed, paint that turd....lol
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Old 06-17-2017, 08:50 AM   #7
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

I've seen many new trucks that are **** brown. I guess it's coming back?
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Old 06-17-2017, 09:07 AM   #8
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

Retro...
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Old 06-18-2017, 10:11 AM   #9
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

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I am not much on the color, it's brown, but she is pretty straight and clean.
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Agreed, paint that turd....lol
My thoughts exactly. Depending on how time goes, I may use it as a learning canvas for body and paint work. Time till tell though.
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Old 07-28-2017, 04:49 AM   #10
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

The tranny is likely a ZF5, which you might start looking at a rebuild. I rebuilt mine a few years ago after I pretty much lost reverse. It would also grind going into 3rd or 4th as well.

The t-case may just need some new detent springs??

After you get it reliable, it'll be time for an innercooler and turbo!!
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Old 07-30-2017, 03:24 PM   #11
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

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The tranny is likely a ZF5, which you might start looking at a rebuild. I rebuilt mine a few years ago after I pretty much lost reverse. It would also grind going into 3rd or 4th as well.

The t-case may just need some new detent springs??

After you get it reliable, it'll be time for an innercooler and turbo!!
How hard is it to replace the detent springs in the T-Case?

I started checking around and these transmissions are pricy to have rebuilt Not sure if I have the expertise to do it myself.

I got lucky, this one has a Banks Kit on it.

I purchased a new 130 amp 3G alternator, new starter, 2 new batteries and enough cable to re-do all the battery, starter and alternator wiring. It should spin over much better in the cold weather with these upgrades.

I also pulled out the hard plastic liner. I actually got pretty lucky here too, there is only one spot that is rusted through. I need to do a small patch and then prep it for a spray in bed liner.

Now I just got to find the time to do it all...
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Old 07-31-2017, 03:38 AM   #12
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

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How hard is it to replace the detent springs in the T-Case?
I honestly couldn't tell ya. You should try to identify what it it is first, and then search google for possible causes. You might find a good article out there??
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Old 08-02-2017, 06:04 PM   #13
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

what tcase? the 205 is a piece of cake just remove to hex caps and pull
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Old 08-14-2017, 09:53 AM   #14
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Default Re: My first 7.3L IDI - 1989 F350 Crew Cab

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what tcase? the 205 is a piece of cake just remove to hex caps and pull
Been a while since I looked at it, but I believe it is the Borg-Warner 1356.
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