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Jan 29, 2008 | 11:20 AM

tjthegreat

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From: Ft Wayne IN

gears help

i have 3.08s in my f-150 it only has 58k miles on it and i was thinking about putting 3.55s and i was wondering if it would be a good idea to get the gears from a junkyard or buy them new

Jan 29, 2008 | 11:46 AM

bocephus_3349

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From: riverton u.s

I say allways buy new. You never know how the ones from the junk yard have been abused. Thats just my .02

Jan 29, 2008 | 11:47 AM

Conanski

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From: Ottawa, Ontario

What motor you have? If going the junkyard route get the whole axle and swap it in after you have installed new seals and axle bearings.

Jan 29, 2008 | 11:48 AM

Skandocious

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From: Davis & Newcastle, CA

If you can open the diff and see the gears before you buy them, just check for chips or gouges. If they look to be in good shape then there's no harm in using them. You WILL, however, want to buy a new rebuild kit (seals, bearings, shims, etc).

Jan 29, 2008 | 11:51 AM

lostin90s

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From: Central PA

If donar truck has low miles 100000 ish get em . I have the 3:55 rears laying all over . r Like 150 a set here . Becuase all parts trucks sitting around. But finding a LS rear may be problem .

I middle of doing a 3:55 swap into a 300-6 5spd Truck . Heck lot more fun.

Jan 29, 2008 | 11:54 AM

Skandocious

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From: Davis & Newcastle, CA

Speaking of which... I recently had some interest in my old 3.55s that are sitting in my garage from someone on this site. They're in perfect shape, not a single flaw. He wanted to buy both sets of gears (front and rear) and both carriers too. Only thing with the carriers is that the rear needs a new crosspin bolt and probably a new clutch pack if he wants the LS to be operable. I have no clue what these things are worth, any ideas?
http://i170.-----------.com/albums/u...p/DSC00796.jpg
http://i170.-----------.com/albums/u...p/DSC00798.jpg
http://i170.-----------.com/albums/u...p/DSC00799.jpg
http://i170.-----------.com/albums/u...p/DSC00800.jpg
http://i170.-----------.com/albums/u...p/DSC00801.jpg
http://i170.-----------.com/albums/u...p/DSC00792.jpg

**end ON-TOPIC thread hijack**

Jan 29, 2008 | 02:44 PM

tjthegreat

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From: Ft Wayne IN

i have a 300 I6 and i also have 4x4 which from what i understand you need gears for both

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Jan 29, 2008 | 04:35 PM

85e150

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Quote:

Originally Posted by tjthegreat

i have 3.08s in my f-150 it only has 58k miles on it and i was thinking about putting 3.55s and i was wondering if it would be a good idea to get the gears from a junkyard or buy them new

\\

3.08 to 3.55s will give you approx 200 to 300 rpm more at 60 mph assuming 30 inch tires and a .78 5th gear. That ain't much...

http://www.novak-adapt.com/knowledge/gearing.htm

Plug in the numbers at that site to see fer yasef.

Jan 29, 2008 | 04:43 PM

#10

tjthegreat

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From: Ft Wayne IN

does anyone kno how much a set of new gears go for

Jan 29, 2008 | 08:07 PM

#11

flareside_thunder

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From: Florida

Randy's Ring And Pinion has excellent prices...check out their website......do NOT get cheap gears....I have heard that the Motive gear sets are loud.....look for the gearsvwith a polar bear in the logo...I wanna say Klondike but that's far fetched.....Luck

JR

Jan 29, 2008 | 08:13 PM

#12

flareside_thunder

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From: Florida

not Klondike........ Yukon gears

www.ringpinion.com

JR

Jan 29, 2008 | 08:31 PM

#13

Skandocious

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From: Davis & Newcastle, CA

Yukon makes good gears. Auburn and Richmond are good too. And don't forget factory gears (Ford or Dana Spicer, depending on the axle), can't go wrong with OEM parts