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Feb 19, 2009 | 01:55 AM

56f100pickup

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9 inch

will a ford 9 inch out of a late 70s model f150 bolt up with no fab. to a 89 f150 with a 8.8

Feb 19, 2009 | 08:06 AM

1966Tbird

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i REALLY doubt it i would bet the spring perches are different and if not the axles are different lengths so you would need a new driveshaft

don't know from experiance though you could go to a junk yard and measure how wide the springs on one of those trucks is and measure how far apart the pearches for the springs are and that would give you a pretty good idea

Feb 19, 2009 | 12:08 PM

jk89cat

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From: vernon hills IL

does your truck have antilock? if so , stop talking about this now, and start looking at 10.25 and dana 60s outa f250/f350

Feb 19, 2009 | 12:09 PM

quicklook2

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8.8 inches has always been enough for my needs.

Feb 19, 2009 | 01:11 PM

1994 F250: 351, C6

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I second jk89cat. Get a 10.25" full-floater out of a F250/F350: stronger axle, easier conversion.

Feb 19, 2009 | 06:21 PM

ktm25094

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say you were goin to 10.25 in your f 150 is i possible to convert the front to a straight axle ive been thinking about doing this but did no if it was possible

Feb 19, 2009 | 06:27 PM

1994 F250: 351, C6

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It is very possible, there are a few guys on here that have done it. You can use a Dana 44 out of an older truck or a Dana 60. With the coil spring/radius arm setup it is harder than leaf springs, but it is doable. Post a seperate thread about the front end swap and I am sure a few people who have done it will chime in with their advice.

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Feb 19, 2009 | 06:50 PM

1994 F250: 351, C6

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That is correct. You would need 8 lug wheels for the 10.25" with at least 16" wheels to clear the brakes. I did not think about that.

Feb 19, 2009 | 06:52 PM

#10

1966Tbird

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i would stick to a 9in there are cheaper parts available from the aftermarket and i doubt you'll break it i have a 600hp nitrous bigblock motor infront of a 9in in my t-bird that's basically stock minus a spool 31 spline axles and gears and no problems yet, if you don't think it's enough get a N case with the big bearings and your good

Feb 19, 2009 | 07:06 PM

#11

BigBlueOx

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From: Rusty, Maine

my friends father has a 9" factory with speed sensor in his '94 4X4 F-150. Very do-able. But also very hard to find. I've been looking for one for about 3 years.

Feb 19, 2009 | 07:19 PM

#12

1966Tbird

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do you REALLY need ABS? you could get some disc brakes for the 9in and be in good shape without ABS

Feb 19, 2009 | 07:43 PM

#13

BigBlueOx

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From: Rusty, Maine

yes but on the later year trucks that's where you get your speed signal is off the rear diff.

Feb 19, 2009 | 07:51 PM

#14

1966Tbird

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oh ok can't you just swap the tailshaft of the trans with an earlier one and run a speedo cable or is it all electric

Feb 19, 2009 | 08:00 PM

#15

BigBlueOx

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From: Rusty, Maine

its all electric but I'm sure someone makes an electric sender that bolts into the tail shaft of a cable tranny or transfer case. Depending on 4X2 or 4X4