Tips of installing an S4D in place of an S4

[John@Outfront]

A friend of mine has a wicked sandcar and he needs a stronger tranny. he currently has an S4 and looking at doing an S4D

questions:

i assume it has the same mounting for the nose cone area. i Know the bellhousing has a different mounting pattern but is the length from nosecone to the bellhousing mounting the same as the S4?

i also assume the shaft spacing is the same too so the motor in relation to the drive flanges--is it the same or would the motor be higher? i ask because the room is really tight where the motor resides. is the measurement of drive flange to drive flange the same so axle length doesn't change?

his current setup uses the old adapter plate set up, does the chevy bellhousing push the motor further back

asking for a friend

 

[Pennywise]

It’s up 1” and back 3/4

 

[Sutton]

Following for knowledge. Also, let me know if he is selling his s4, bellhousing, clutch, shifter set up or any associated parts.

 

[John@Outfront]

From those dimensions it doesn’t show there is any upward movement of “ drive flange center to input shaft center. They look the same. Only the belly of the bellhousing appears to go down a bit more. Can we see the whole dimensions I do see where the motor would be set back an inch.

 

[J Alper]

Drop the trans down low or have Midboards

 

[Pennywise]

From those dimensions it doesn’t show there is any upward movement of “ drive flange center to input shaft center. They look the same. Only the belly of the bellhousing appears to go down a bit more. Can we see the whole dimensions I do see where the motor would be set back an inch.

The full pdf is on Weddle's site https://weddleindustries.com/products/S4D-TRANS/S4D-TRANS I know on the two I have done we had to raise motor mounts. If the frame allows I supposes you can drop the rear mount down as long as you can maintain correct angle.