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2008 Ford Ranger ??
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FREEDGUY View Drop Down
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Joined: 15 Apr 2017
Location: South West Mich
Points: 5396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FREEDGUY Quote  Post ReplyReply Direct Link To This Post Topic: 2008 Ford Ranger ??
    Posted: 02 Jul 2022 at 5:37pm
A friend of mine picked this buggy up cheap due to a family death. He drove it home from Ohio on the "turn-pike-toll road" and couldn't hit 65, and the tach was at 2900 Confused. He says it's a 4 banger so he's unsure if the RPM'S are normal for that speed. It's an auto tranny btw Embarrassed, thanks
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DMiller View Drop Down
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33555 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2022 at 6:07pm
Converter is Toast or the Lock Up system is fried.
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FREEDGUY View Drop Down
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Joined: 15 Apr 2017
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Points: 5396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FREEDGUY Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2022 at 6:11pm
Thanks, he just informed me that it has a 4:10 rear end in it , it's a NON 4X4 also 
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
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Points: 86816 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2022 at 6:17pm
that engine speed would be about right for a 4.10 rear end... The motor is 140 cubic inches or about the size of a Allis D10 tractor engine...... he aint going to win any drag races..... That little engine needs a 4.10 just to get up to speed... Still think it should run 75 mph and 3500- 4000 rpm...... but i would not push it over 60 mph.

Edited by steve(ill) - 02 Jul 2022 at 6:19pm
Like them all, but love the "B"s.
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PaulB View Drop Down
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Joined: 12 Sep 2009
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Points: 5036 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2022 at 7:13pm
FORD:
 For 
 Only
 Racing
 Downhill
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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tadams(OH) View Drop Down
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Joined: 17 Sep 2009
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Points: 10736 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tadams(OH) Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2022 at 2:59pm
Paul that's better Than Garage Mans Companion
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DMiller View Drop Down
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Joined: 14 Sep 2009
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Points: 33555 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2022 at 3:19pm
Would be a oddball Auto on such a Low rear ratio, usually were closer to 3 or 2.5 unless OD or at least lock up converter.
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PaulB View Drop Down
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Joined: 12 Sep 2009
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Points: 5036 		Post Options Post Options   Thanks (1) Thanks(1)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2022 at 3:26pm
Originally posted by tadams(OH) tadams(OH) wrote:

Paul that's better Than Garage Mans Companion


How about; Got a Mechanic Coming?
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Lars(wi) View Drop Down
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Joined: 14 Sep 2009
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Points: 7925 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lars(wi) Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2022 at 3:56pm
Originally posted by FREEDGUY FREEDGUY wrote:

A friend of mine picked this buggy up cheap due to a family death. He drove it home from Ohio on the "turn-pike-toll road" and couldn't hit 65, and the tach was at 2900 Confused. He says it's a 4 banger so he's unsure if the RPM'S are normal for that speed. It's an auto tranny btw Embarrassed, thanks

First I would recommend getting it to Ford mechanic and get the accuracy of the gauges checked, and check for proper transmission function. The transmission more that likely needs a pm service anyway. If those have the same transmission as the Taurus, every 30,000 miles do a transmission fluid and filter change.
I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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Joined: 12 Apr 2010
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Points: 6036 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveKamp Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2022 at 10:47pm
If you can't hit 65, and your tach won't take it past 2900 with 4:10's and ~28" tires

Most common was a 215/75-R15... that's 27"  or 776 rotations per mile...

at 60mph, that's 776 tire rotations per minute.

2900/4.1 = 707rpm... so you're in the ballpark +/- tire size variation (larger tire=larger diameter = lower rpm)

double check your instrument panel's indicated road speed against GPS. 

IF you're running the 215/70-R15 (that's 27" diam and 776 rotations per mile) you'd have a driveshaft speed of 3181rpm.  The transmission would be in an overdrive ratio to be at 2900, but I wouldn't be surprised if the automatic WAS an overdrive.

Stock axle for that is the Ford 7.5", and it was available in open and limited slip (Auburn gear!) variants, 4:10 WAS a common ratio.

Aside from wind drag or some other serious parasitic load, you SHOULD be able to get her to break 80 without too much difficulty, but the coefficient of drag, particularly with an open bed, will likely cause the rear end to become aeronautic feature rather than automotive... and when that happens, pickup trucks  tend to hit a 'brick wall' for ground speed.

I believe your engine is called the 2.3 'Duratec'... if so, it's a dual overhead cam, driven by timing chain.  Generally, the chain will have an indefinite service life, but SOME of those engines had a variable valve timing system.

I don't know exactly how they did it on this one (it's mostly a Mazda design IIRC), but if it has VVT, and that feature is somehow inoperative, then you'll find it's powerband is restricted at one end or the other.
Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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