Ford C4 2.75 low gear?

[fordteacherguy]

My Broader Performance C-4 2.92 low uses a GM 125C for the C-4 front planetary. Looks like the same GM planetary on my ATI 2.92 as well.

[jmantle]

Originally Posted by fordteacherguy

My Broader Performance C-4 2.92 low uses a GM 125C for the C-4 front planetary. Looks like the same GM planetary on my ATI 2.92 as well.

Brian, did you ever try the car with the stock front planetary to see how much difference the low gear set made?

Jim Mantle 6632 V/SA

[fordteacherguy]

Hey Jim,

I did compare std/low ratios some time ago, and my heavy beast of a stocker (#3610 min weight) did appreciate the lower gear set. Now my slightly lighter Super Stocker........well, stay tuned. We'll see this year what that one likes.

I remember our conversation on the subject. Say hi to Debbie! Getting both cars ready!

[my69396]

The ATI gear sets are made out of th200 gear sets. They call them 2.75 but are really 2.82. Had two sets in the torino at D weight and broke both sets. Got a straight cut 2.75 gear set from Dave at Pro Trans had no more problems.

[Mart Jeltema]

The 2.75 is a custom set.
2.46 is stock

[vsrc]

the 2.75 is based off of the 2004-r foward planet, it's a nice piece when done correctly. my customer mark young has run one with over 500 passes, no problems.

[428tom]

How much machine work has to be done in making the 2.92 gear out of the 125c gm transmission fit in the C4.