T-10 Trans gear ratio change

[blackhawk61]

Early T-10 Trans has a 2.20 1st gear .......Do you have to change all the gears in the trans to get a 2.54 1st gear ?.......OR...to put it another way......Are there any gears that DO NOT have to be changed ?

1961 Hawk 4BC,4-SPEED,TT

Ken Byrd
Lewisville,NC

[Chicken Hawk]

quote:Originally posted by blackhawk61

Early T-10 Trans has a 2.20 1st gear .......Do you have to change all the gears in the trans to get a 2.54 1st gear ?.......OR...to put it another way......Are there any gears that DO NOT have to be changed ?

1961 Hawk 4BC,4-SPEED,TT

Ken Byrd
Lewisville,NC

I had to change the Cluster, input, and second gear.

The 2.20 cluster tooth count was: 28-23-20-17

The 2.54 cluster tooth count was: 30-23-19-17

2.20 input was 27

2.54 input was 25

2.20 second was 32

2.54 second was 30

Ted

[blackhawk61]

Thanks Ted .....Will Chevy cluster and 2nd gears work ?...I know the input is longer.

1961 Hawk 4BC,4-SPEED,TT

Ken Byrd
Lewisville,NC

[Chicken Hawk]

quote:Originally posted by blackhawk61

Thanks Ted .....Will Chevy cluster and 2nd gears work ?...I know the input is longer.

1961 Hawk 4BC,4-SPEED,TT

Ken Byrd
Lewisville,NC

The Chevy input will not work, as you say, unless you come up with a longer pilot bearing since the Chevy is shorter. As far as I know, the other Chevy gears with correct tooth count would work.

Ted

[R2Andrea]

You could also: A) buy the later (Ford style) Stude T-10 and swap the guts to your chevy style case.
B)buy the later (Ford style) Stude T-10 and matching bell housing and install both as a set. AFTER dial indicating the bellhousing as per the Shop Manual.
I'm going the other way. Swapping my 2.54:1 gears for a 2.20:1 set at rebuild time.


R2Andy