fordmuscle83
Well-known member
What gear ratios does this box come in and what rear diff raito were they matched to in prodution cars.
Thanks,
Pete
Thanks,
Pete
Top Loader
- Thread starter fordmuscle83
- Start date
What follows isn't exact, as I no longer have my early Wheels mags to check.
But there were two types in Aussie, four types in America.
Aussie: Imported wide or close ratio, found in Cortina sixes, 1967 XRGT to 1973 XBGT's, when the single rail got used. Local content rules. The CKD Broncos and F150/250's possibly ran them till 1980. F150/250 Sixes had some granny low gearbox ratios, but I don't know if it was a Toploader or not.
Wide Close (estimated)
1: 2.78 2.42
2: 1.93 1.78
3: 1.31 1.29
4: 1.00 1.00
All Aussie boexes were just ex US 289 to 3514V gearboxes based on the truck division top loader found in early Galaxies. It started life as a 3-speeder, and then got updated to the very nasty Bull Nose Top Loader used in some big block 427/428/429's. Some got Liberty cut synchros with every second synchro cut off and replaced with a the dog clutches. These were race pieces, and I doubt they got into production cars unless they were a Total Performance option.
The US Top Loader lasted to 1977 or later, when it got a 3-speed plus o/d ratio set. It got replaced by T10's, T19'S, and SR and SROD Borg Warners. It used the three speed ratios, 2.95, 1.69, 1.00, and then added a 0.70 top on it.
So there are four US types. 3-speed, 4-speed, BullNose 4-speed, and the later 4-speed overdrive.
Diff ratios. In Aussie all 9" were limited slip, and 3.0:1. 2.75:1's only saw duty behind FMX autos, not Top Loaders unless there was a regular production option (RPO) for it.
GTHO's got 3.25,3.5, 3.9 factory options. The Ford F150/ Bronco trucks got 3.9, 4.11 and other ratios. Some early pre-1972 V8's got BW 78 diffs with 3.23, 2,92, 2,77 ratios and Toploaders behind the 289, or 302's.
Cortina sixes with toploaders ran 2.92 or 2.77 BW 78 diff's.
F150/250 Broncos rans Ist gears which were stump pullers so the diff ratio didn't have to get changed.
It's likely the six cylinder trucks got a V8 or EFI-style 9.5" clutch to suit the bell-housing, and everyone wants the huge heavy duty clutch of about 10.5 or 11" the 351 Cleveland manual trucks ran. Won't fit a six though.
But there were two types in Aussie, four types in America.
Aussie: Imported wide or close ratio, found in Cortina sixes, 1967 XRGT to 1973 XBGT's, when the single rail got used. Local content rules. The CKD Broncos and F150/250's possibly ran them till 1980. F150/250 Sixes had some granny low gearbox ratios, but I don't know if it was a Toploader or not.
Wide Close (estimated)
1: 2.78 2.42
2: 1.93 1.78
3: 1.31 1.29
4: 1.00 1.00
All Aussie boexes were just ex US 289 to 3514V gearboxes based on the truck division top loader found in early Galaxies. It started life as a 3-speeder, and then got updated to the very nasty Bull Nose Top Loader used in some big block 427/428/429's. Some got Liberty cut synchros with every second synchro cut off and replaced with a the dog clutches. These were race pieces, and I doubt they got into production cars unless they were a Total Performance option.
The US Top Loader lasted to 1977 or later, when it got a 3-speed plus o/d ratio set. It got replaced by T10's, T19'S, and SR and SROD Borg Warners. It used the three speed ratios, 2.95, 1.69, 1.00, and then added a 0.70 top on it.
So there are four US types. 3-speed, 4-speed, BullNose 4-speed, and the later 4-speed overdrive.
Diff ratios. In Aussie all 9" were limited slip, and 3.0:1. 2.75:1's only saw duty behind FMX autos, not Top Loaders unless there was a regular production option (RPO) for it.
GTHO's got 3.25,3.5, 3.9 factory options. The Ford F150/ Bronco trucks got 3.9, 4.11 and other ratios. Some early pre-1972 V8's got BW 78 diffs with 3.23, 2,92, 2,77 ratios and Toploaders behind the 289, or 302's.
Cortina sixes with toploaders ran 2.92 or 2.77 BW 78 diff's.
F150/250 Broncos rans Ist gears which were stump pullers so the diff ratio didn't have to get changed.
It's likely the six cylinder trucks got a V8 or EFI-style 9.5" clutch to suit the bell-housing, and everyone wants the huge heavy duty clutch of about 10.5 or 11" the 351 Cleveland manual trucks ran. Won't fit a six though.
fordmuscle83
Well-known member
Were these in any ozzie cars? Opps NZ too, lol?
Im only enquiring becuase i love the idea of the renagate.com shifter and they are compatable with these two ford trans'.
Would be nice behind a crossflow.
Also EXCUTE, what is the gearbox thats comes out of a fox bodied mustang (love those!!!) that is a four speed manual with and overdriven forth. I read it on here and have never heard of that before. You could still run a low diff and cruize n the freeway.
THANKS
Im only enquiring becuase i love the idea of the renagate.com shifter and they are compatable with these two ford trans'.
Would be nice behind a crossflow.
Also EXCUTE, what is the gearbox thats comes out of a fox bodied mustang (love those!!!) that is a four speed manual with and overdriven forth. I read it on here and have never heard of that before. You could still run a low diff and cruize n the freeway.
THANKS
Although not the same as the Aussie Borg Warner Single Rail, the SROD is a stout bit of kit found on, I think, post 77 Foxes without the od (the SR), and in Capris, Mustangs, Fairmonts etc as SROD'S after 1979. They are smooth shifters, and although people in the US press complained at the dorky ratios, they are perfect for a quick quarter mile trip. Its a 3-speed plus o/d trans which gives results like a close ratio Charger E38 with a 3.5:1 SureGrip. As you say, that allows a screamer set of gears for the drags, and a nice cruise home in top. I'm unsure of the input shaft length, but its likely to be splined as per the Aussie Single Rails.
Martin, my V8 buddy, ran a late Toploader OD in his 289 XF with 3.23:1 gears. (It was a 3.3 5-speed). 100 km/h in top was less than 2000 rpm, while the snap shift to third resulted in a good overtaking gear at 2800 rpm, and second could anahilte any thing in sight with 4700 rpm at 100 kmh. First was a stump pulling 12 km/h per 1000 rpm, or 10% lower than a four speed EFI XE gear.
Good gearing made the car a pleasure with a revy engine that could cruise on the throttle on the lopeing top gear.
Martin, my V8 buddy, ran a late Toploader OD in his 289 XF with 3.23:1 gears. (It was a 3.3 5-speed). 100 km/h in top was less than 2000 rpm, while the snap shift to third resulted in a good overtaking gear at 2800 rpm, and second could anahilte any thing in sight with 4700 rpm at 100 kmh. First was a stump pulling 12 km/h per 1000 rpm, or 10% lower than a four speed EFI XE gear.
Good gearing made the car a pleasure with a revy engine that could cruise on the throttle on the lopeing top gear.
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