Auto trans not engaging fully on my friends car. What can this be?

[erickmarciano]

Hi guys my friend just finished his 5 year restoration.
When you step on the gas the car does not move as much as it should like it is slipping
Trying to help him out.are there adjustments in the clutch bands?
If so where and how.car shifts late and hard
The modulator is now at the minimum pressure Setting.
Thanks for your help
Erick

[Rolf-Dieter ✝︎]

Have you read thru this section?

---> http://www.sl113.org/wiki/Automatic/Start#RoughShifting

I don't know if you can access this area of our forum since you are not a full member ... Anyway give it a try

Good luck

[GGR]

The trans may be low on ATF.