gear ratio

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Mar 18, 2006 | 12:02 PM

90Superduty

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gear ratio

hi guys, another newbie with a gear question. i have a 90 model superduty with a z5 trans,7.3idi,& this is off the tag on the rear end,5.13 E9TA PA 605400-2. any idea what i have? thanks for any reply.

Mar 18, 2006 | 01:41 PM

ltfox

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From: CentralEastern Utah

5:13 rears.......

Mar 18, 2006 | 03:21 PM

90Superduty

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Thanks Itfox, for the reply, do you know any more info such as, 9in, 10.25 etc

Mar 18, 2006 | 03:40 PM

JMac444

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Prob 10.25, damn that thing cant go that fast with 5.13 but i can just image the power on low or first gear lol.

Mar 18, 2006 | 03:47 PM

90Superduty

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only 78 mph at full throttle. 3500 rpms

Mar 18, 2006 | 03:51 PM

90Superduty

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thinking of changing gears. maybe around 410,456, I really dont know. Anyone have any ideas?

Mar 18, 2006 | 06:46 PM

Dave Sponaugle

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From: Nutter Fort, WV

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Mar 19, 2006 | 09:04 AM

90Superduty

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Hey Dave, thanks for the reply. I just use the truck mostly on weekends, I have a work truck for everyday. I may use it to pull a 16 ft. trailer once or twice a month to haul two or three ATV's.

Mar 19, 2006 | 09:11 AM

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90Superduty

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Hey cookie88,This thing does have dual rear wheels with 10 hole lugs, & 14,500 gvw. Do I need to look for more tags on the rear end, to find out what it is?

Mar 19, 2006 | 10:06 AM

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84deisel

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From: Algona ,IOWA

dana 80 is what they used in the fsuperduty.

Mar 19, 2006 | 10:59 AM

#12

90Superduty

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thanks 84, thats what I was wanting to know.I guess I didnt ask the right question. Sorry. Any ideas on what gear to change to to get a hiway speed with a lot less rpm,s?

Mar 19, 2006 | 11:09 AM

#13

roamer37

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From: Grosse Ile Mi.

jack up your truck one rear wheel have someone count the turns on the drive shaft while you turn the wheel 20 turns if it is a 5.13 the driveshaft will turn 53 times

Mar 19, 2006 | 11:22 AM

#14

cookie88

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From: Cabot, Arkansas

Quote:

Originally Posted by 90Superduty

thanks 84, thats what I was wanting to know.I guess I didnt ask the right question. Sorry. Any ideas on what gear to change to to get a hiway speed with a lot less rpm,s?

I don't know what gears are available for the D80, but the 4.10 or 4.56's you mentioned earlier will give you more top end at a lower RPM. You wold be sacrificing some low end grunt, but no more than you work the truck you won't miss it.

Last edited by cookie88; Mar 19, 2006 at 11:25 AM.