904 vs Borgwarner AUTOS

[sigtool]

so
i have a gj scorpion with a sad old auto which i believe is the baby 904
i have a borgwarner Auto rehashed with falcon clutch packs sitting on the shop floor
can they be swapped?
i have to change flexplate but otherwise will the yoke fit?
any ratio changes ect
would the borg throw my speedo out?



cheers

[sigtool]

BUMP

[bruggz351]

Hey man.
I don't know for sure but would hazard a guess that the output shaft spline count would be different too.
Do you know if the trans mounts are the same?
What about the length of each trans?

cheers

[leoca64]

so
i have a gj scorpion with a sad old auto which i believe is the baby 904
i have a borgwarner Auto rehashed with falcon clutch packs sitting on the shop floor
can they be swapped?
i have to change flexplate but otherwise will the yoke fit?
any ratio changes ect
would the borg throw my speedo out?



cheers

send scorpion collector a email mate

[BAD-SIG]

According to my workshop manual, here's the difference:

Torqueflite MA904A:

1st=2.45
2nd=1.45
3rd=1.00

Stall=2200-2650rpm

Borg Warner 35:

1st=2.39
2nd=1.45
3rd=1.00

Stall=2500-2600rpm

[Scorpma82]

wont throw ur speedo out (assuming ur not changing diff ratios and wheels/tyres)

Yes you can put in a late 80's/early 90's Falcon valve body in the BW(as a bolt-in mod) for a more aggressive shift pattern (acn only be a 3-speed auto from the Falcon)

[geezer101]

would the borg throw my speedo out?

I swapped a BW for a T904 and it did throw my speedo out a fair bit (about 10% but I never had it accurately tested or checked against a GPS so this is a guesstimation only - and this was in a GD wagon with the original auto diff)