question on gearing

[84CUCV]

My friend has a m1009 4" lift 10b with 4.10 gears. I think. 35" tires. th400 went. now has a sm465/205 out of a 87 k30. never any problems with the th400. never broke a thing. now with the sm465 he just lost his 3 rear axle shaft.

does it put more power to the rear? i know what i mean. just not sure how to explain it.

thanks for the help

 

[vortec]

first gear is deeper, so yes he's now applying more force than before.

iirc...

th400 = 2.48:1

sm465 = 4.55:1

that's a BIG difference

 

[shaun89]

i think theres no "shock" absorbing when you have a standard, its all turning but with an auto, you have a little bit of "shock" absorbing in the tranny...im not positive but its just what i think it could be

 

[JasonM]

Yes your friends transmission swap multiplied his output torque, time for an axle upgrade. Or pull a trailer full of axle shafts with you on your outings...

 

[Hogback Fabrication]

first gear is deeper, so yes he's now applying more force than before.

iirc...

th400 = 2.48:1

sm465 = 4.55:1

that's a BIG difference

TH400 = 2.48

SM465 = 6.55

 

[vortec]

TH400 = 2.48

SM465 = 6.55

oops. typo. i guess i hit "4" because of the sm"4"65 without thinking.

thanks.

 

[84CUCV]

OK i get it. time for 14ff.

 

[CUCV2]

My shortbox with a SM465 came with a 1350 rear ujoint where I am pretty sure the norm was a 1310. I wonder if the SM465 is the reason why.