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post #1 of 17 Old 10-02-2008, 02:37 PM Thread Starter
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Gears!

When im cruising at 70 mph my rpms are at about 3200. Does that mean i have 4.10s or what? Its a 5 speed manual. Also my boost gauge used to sit at 5 psi at that rpm but now it sits at about 3psi. What does that mean?

2004 F-250 4x4 sc long bed
afe intake
mbrp exhaust
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post #2 of 17 Old 10-02-2008, 04:53 PM
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4.10 should put you at or about 2300 but 3200. wow thats geared low. 5.13 maybe? are the tires stock size? i assume your are in 5th and not 4th also. running 1 to 1 in forth you can use the calculator to find out your gears. i believe randys ring and pinion has one on thier site. maybe one on here also but i dont know.
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post #3 of 17 Old 10-02-2008, 04:59 PM
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yea somthin aint right with that i had/have 4.10's in both my trucks and at 75 it should be right at 2500 rpms

Caylon Golden24
[B]01' F-350[B] ccsb dually 4x4 BTS
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00' f-250scsd 695.8hp
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post #4 of 17 Old 10-02-2008, 05:07 PM
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sounds like your in 3rd gear with those r's,thats messed up,your prolly bouncin off the rev limiter.id figure it out quickly.

96 F250 460-auto-ext.cab-long box-4.10-152k-10mpg all day running or not.....

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post #5 of 17 Old 10-03-2008, 03:47 PM Thread Starter
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No i can make it bounce off the rev limiter at like 95 mph.

2004 F-250 4x4 sc long bed
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mbrp exhaust
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post #6 of 17 Old 10-03-2008, 06:11 PM
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wow. 3200! i bet your truck doesnt like that at all

MATT

Now featuring a 6.4 fat bottum 6 speed
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post #7 of 17 Old 10-03-2008, 06:35 PM
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Yup sounds right. I have 4.10 with the 5 speed in my truck. My truck is almost always running over 3 grand. If I remember correctly, 65MPH is like almost 3K. JJ

04 F-550 CC 6.0 4x4 cab n chassis 4.88 XLT 193K
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97 F-350 CC 7.3 ZF-5 4x4 4.10 324K
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post #8 of 17 Old 10-03-2008, 08:11 PM
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That sounds wrong, My truck runs at 2500 at 70 to 72 and its 4.10 with a five speed. I dont see 3000 until I reach 80 to 82

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post #9 of 17 Old 10-03-2008, 08:22 PM
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Quote:
Originally Posted by blazeproc View Post
That sounds wrong, My truck runs at 2500 at 70 to 72 and its 4.10 with a five speed. I dont see 3000 until I reach 80 to 82
this sounds more acurate to me^^^^^^

MATT

Now featuring a 6.4 fat bottum 6 speed
95 f250--238k and counting
RDS stage I's-TW live tuned-Dana 60 swap-9" lift/40x13.5x20 ProComps-ZF5 swap/short throw/South Bend CON OFE-Iron Bull front-AFE CAI-SD innercooler-Fab Tech traction bars-MBRP DP/6" black miters-Autometer boost/pyro

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post #10 of 17 Old 10-03-2008, 08:25 PM
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I will try to get my old truck back out tomorrow and run it down the road. I have not driven it in about a month so I am not absolutly sure but mine seems to run high RPMs from what I remember. JJ

04 F-550 CC 6.0 4x4 cab n chassis 4.88 XLT 193K
Money maker with utility bed.
97 F-350 CC 7.3 ZF-5 4x4 4.10 324K
Moves my stuff around.
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