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Old 07-30-2004, 05:59   #1 (permalink)
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BW 5 speed gear ratios

I have a Borg Warner Aust. 5 speed gearbox with the serial no. "0552-066900 AC" stamped upside down near the shift & would like to know the gear ratios in this box. Any clues would be most useful...






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Old 07-30-2004, 23:55   #2 (permalink)
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Re: BW 5 speed gear ratios

i have a ford transmissions book here and i can't find any of these serial numbers that match yours, if your gearbox is cast iron for the main housing part and has an aluminuim end-shaft housing then it will most likely be a 5speed from an XE or XF in which case:
1st- 3.47:1
2nd- 1.96:1
3rd- 1.26:1
4th- 1.00:1
5th- 0.79:1
which is the same ratios as the 4speeds just with the overdrive capability.

if the gearbox is an all aluminuim housing type it could be a T5 or T5OD to be exact.
If it is a T5 then it gets a bit hairy because of different combinations of gearsets for different engines 3.9ltr, 4ltr, 5ltr and 5ltr sprint and that is just for the EA/EB 5speeds there are more for the EL/EF and again for AU/AUII gearboxes

let us know what type of box it is and i'll be happy to have a look for you.
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Old 07-31-2004, 00:22   #3 (permalink)
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Re: BW 5 speed gear ratios

PS: I Had another look at the box. Its all alloy, found the tag - i believe it reads "7DA 7003 AB" on the top line with "552-003" under it. Anything of use?
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Old 07-31-2004, 17:22   #4 (permalink)
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Re: BW 5 speed gear ratios

umm no those numbers aren't much help sorry
the only model numbers i found for the EA onwards gearbox was a model code of T5OD for EA/EB and EL/EF. M57 is the model code for AU/AUII gearboxes.

i'll see if i can scan in the page with the ratios for you
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Old 11-03-2008, 12:22   #5 (permalink)
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Re: BW 5 speed gear ratios

Quote:
Originally Posted by RevHeadRon View Post
i have a ford transmissions book here and i can't find any of these serial numbers that match yours, if your gearbox is cast iron for the main housing part and has an aluminuim end-shaft housing then it will most likely be a 5speed from an XE or XF in which case:
The XE and XF gearboxes do not start with the number 0552, but are
5 SPEED BORG WARNER 0507 xxxxxx (named an M76). aparently these boxes were supplied in Commodore VK's and the 3.3L XE's. The M76 is weak as snot, and would work and die very quickly behind a 90's or 2000's 4L.

Quote:
if the gearbox is an all aluminuim housing type it could be a T5 or T5OD to be exact.
If it is a T5 then it gets a bit hairy because of different combinat....
let us know what type of box it is and i'll be happy to have a look for you.
I, too, have the chance to buy one labelled BORG WARNER 0552 066900. It is complete alloy housing, and as such I am very interested in it. Even if it has come out of the EA - at least it will run behind my mostly stock EF without bending.

I guess it is EA or EB as the condition of the alloy suggests 20 odd years, not 5 or 10. If that is enough info to find out the gear ratios, then please tell!

If fifth is similar to the M76's 1:.76 or similar, then I may just buy this box...! Do not want top gear to be 1:1 ....
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