Technical > Dan Dishon's Transmission Den

Changing cases and have questions on drilling modifications

<< < (2/2)

hemidakota:
Sorry one more question. Have been told not to do the double dump holes as for it will hit the tires harder? Should there only be one hole drilled from the piston side to intersect with the hole up from the valve body? Should it be 5/16 or 3/8". His trans brake did hit very hard before and was wondering if only drilling one hole would tame it down a little per say... Or do you want it to be like that for a reason. I would like to get the fed to 60' better. Before it was very hit and miss on how violent it would leave. I do think the band is very worn and will be replaced also.  Sorry for all the questions but want to make the best of this before going wild with it. Eventually it will get a good sfi cased trans. Thanks again...

bikeguy307:
Drilling just the one passage will soften the hit, the size should be 5/16. Now along with softening the hit it will also solw reaction times, to what degree, that is trial and error. You can always drill the 2nd hole later if the reaction is to slow. I figured with the debris in the pan and the adjustment being way out the band had to have been worn.

BK:
Would the reverse clutches tend to wear a little quicker with the slower release ? And how small could you go with the hole?

bikeguy307:
No it does not wear the clutches the drag at release is very minimal. I have some fast bottom bulb guys down to 1/4" to slow the hit.

Navigation

[0] Message Index

[*] Previous page