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Old 07-07-2007, 05:15 PM
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97f250tranny

my 97 f250 runs at high RPMs on the highway. is this my tranny or the axles? if its the tranny how do i identify a normal one that will run at regular RPMs.
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Old 07-07-2007, 05:21 PM
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whats high rpms? you gotta give more details. as far as if its tranny or axles, its a combination of both. you have your final drive out of the trans and you have a dear ratio. if your running really low gears your rpms will be higher at highway speeds. i had a lifted truck with 4.88 and 40" tires. when ever i would put a smaller tire on the rpms would skirocket at highway speeds
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Old 07-07-2007, 05:28 PM
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i have a 97 stick shift and i redline at like 85
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Old 07-07-2007, 05:57 PM
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i got a few buddies w/ 97 f 250's & their trucks run about 1800 - 1900 rpms @ 70 mph & mine runs @ 2200. two mechanics told 2 diffrent things; one said my axles were low geared & the other one my tranny was different from the regular trannies these came with. hesaid that tranny was for heavier pulling. i just bought this f250 in jan. & its my first powerstroke any info will be very usefull. thanks!!
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Old 07-09-2007, 08:33 AM
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check your gear ratio. if you have a lower gear than you will know if you dont than you will know its in the tranny
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Old 07-28-2007, 06:28 PM
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good for pullin, bad for mileage

i've got a '97 f250 and it has the 4:10 gears, it seems to be rare because even some guys with f350 have 3:55's.

at 70 i'm running 2300 rpms.
@ 60 it's like 1900.

also, if you've learning about your truck, check yer rear brake shoes. I went to replace mine and already had it tore into when i found out that my truck was also ordered with F350 or "1" ton rear brakes which are like 1 inch wider.

only way to lower rpms is to change gears in both pumpkins, or get a Gear vendors splitter for about $3000.
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