Rear axle question

Clutch, transmission, rear axle

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guts3d
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Rear axle question

Post by guts3d »

Hello, all! Thanks for having me on your Forum. I have a question, I own a 1968 F100 Ranger. It has a 351 Windsor V8 motor with a C4 transmission. My rear end went bad, and I have to get it replaced. My question is, will I be able to use a rear end assembly from a newer truck, say a 1978 F100? If so, will it need to be modified or will it bolt in? It is not 4 wheel drive. :?
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HIO Silver
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Re: Rear axle question

Post by HIO Silver »

It is not a direct swap.....

Bumps have a narrower rear frame width and therefore the leaf spring pads on the 78 axle are located more outboard.

It'll work if ya get them cut off and relocated/rewelded to match your frame width.
70 F100 LB 2WD, 360FE, E-Street EFI, TKO-500, 76K original miles.. follow my rebuild: The Lo-Buck Bumpside
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guts3d
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Re: Rear axle question

Post by guts3d »

Thanks for the info. One question, what do you mean by "bump"?
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TNIceWolf
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Re: Rear axle question

Post by TNIceWolf »

A bumpside or bump is a 67-72 year of ford truck. A dentside or dent as they are called here is 73-79. The difference in the designation is the either convex or concave shape of the style line on the body. Many of the parts for both types are interchangeable but not all without some work. So it sort of helps to know just which critter you are trying to tame.
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sargentrs
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Re: Rear axle question

Post by sargentrs »

When you say "my rear end went bad" are you just referring to the 3rd member/center section? If so, these guys have quality center sections available for the 9" for under $500 with your choice of gear ratios. http://www.quickperformance.com/Ford-9- ... _p_36.html You can't hardly rebuild your own for much less than that. I bought an 8" from them for my '64 Fairlane and is was a quality rebuild that bolted right in with no issues.
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1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
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Subzero
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Re: Rear axle question

Post by Subzero »

All F100 rear ends should work with bumpsides, I had to replace mine in my old 1968 F100 with a 1972 9 in. Couldn't get it to stop leaking from the axle seals even after numerous replacements- the 1972 one sealed up and stayed that way. Earlier 9in have different smaller rear brakes but I think they will also fit with small modifications but more brake is better.
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Gone but not forgotten: 1968 F100 Ranger- 2WD, LWB, original rebuilt 360 V8, Autolite 2bbl carb, C6 Trans, Hedman Headers, Powermaster Racing Starter, H-Pipe and Glasspacks, P/S, P/B, A/C
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