Hello i was wondering if anyone knows off the top of their head how many spline detroit locker i would need to order for my 78 bronco? i think they have 9" rear ends... but i run into 31 spline and 35 spline ones on ebay
Never heard of a 35-spline Ford 9". Maybe it's an aftermarket item. From the factory, they either came with 28 or 31 splines. Most trucks had 31, most cars had 28.
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Andy
1989 F-150 XLT Lariat Shortbed 4x4 300/T-18/3.55
1990 Bronco Eddie Bauer 4x4 351/E4OD/3.55
Quote:
It often takes more courage to change your opinion than to stick to it.
Election 2008 results: World's worst job given to a black man.
Don't have a Bronco parts book, as they were in the car parts books till 1980, but there's no 35 spline axle shafts listed for F100/150's, and the F Series and 1978/79 Bronco's were basically the same.
First year that Ford offered a 31 spline 9" rear axle for a truck was 1968. It was an option on all F100's and prolly used in the F100 390 Camper Specials as standard equipment.
__________________ Bill / Retired Ford Parts Manager ~ 1962/1997
Part Number Research: Trucks: 1928/2002 / Cars: 1928/2003
1963 Galaxie 500XL / 1965 F100 / 2008 Fusion S / 2008 Edge SEL
35 spline is aftermarket and makes for a practicly bullet proof setup. if you can fork over the doe go for it. this would be if you plan on running a tire larger then 36"
Like kemicalburns said, 35 spline shafts are aftermarket.
ALL 78 79 Broncos came with 31 spline ford 9"s.
I want to say all 66-77 Broncos came with 28 splines.
The 35 spline will hold up to alot more power and abuse, but isn't really needed unless you plan on using a big tire and do burn outs or go on rocks.
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79 Bronco 400 C6 NP205 D44 9" 4.56 gears Lockers 6" lift and 37" SS Iroks
77 F-100 302 C4 D44 31" M/Ts
04 F150 Lariat Screw 4x4 2"AS 32x11R17 Hankook M/Ts or 34x10.50-17 SS LTBs
Ya big tires and burn outs on rocks.. i dont know if i will be doing that but if its just ordering axle shafts in addition to the locker i would upgrade.. depending on how much extra.. cause the lockers are the same price for the detroit anyhow.
I think the 35 spline differentials require 3.25 carrier bearings, which will require an aftermarket carrier to the tune of at least $230 for the cheap one.
