400 lunging forward on start up.

[nonoss38]

Noticed yesterday that when I start my car up it lunges forwards a few inches in park. Fluid if full. Im sure this is in the valve body?

 

[turbobitt]

The forward clutch sounds like it's dragging because it was set a little on the tight side. It may be normal when it's really cold. Does it do it warm?
AG


Posted from the TurboBuick.Com mobile app

 

[nonoss38]

The forward clutch sounds like it's dragging because it was set a little on the tight side. It may be normal when it's really cold. Does it do it warm?
AG

Yes it does. I stopped at a job sight of mine yesterday and had it in park. Rev the engine and it jumped forward like it does on a cold start up.?

 

[turbobitt]

Sounds like it may need some attention. If the clutches are warped from slipping and getting hot it could cause this. Not sure if a cross leak in the valve body would do this but checking the vb bolts may not be a bad idea.
AG


Posted from the TurboBuick.Com mobile app

 

[turbobitt]

The vb surfaces in the case are machined sometimes with a rough finish and Need to be stoned. I just did one over the weekend a happened to snap this photo showing high and low spots.

Posted from the TurboBuick.Com mobile app

 

[nonoss38]

Thanks for your help turbobitt. I was going to pull the trans out over the winter and check it out. Sad thing is there are not a lot of shops around my area that can build a 400 to withstand any power. Any advice on Shops that can build a strong 400?

 

[turbobitt]

Thanks for your help turbobitt. I was going to pull the trans out over the winter and check it out. Sad thing is there are not a lot of shops around my area that can build a 400 to withstand any power. Any advice on Shops that can build a strong 400?

Were are you located?
To be honest I'm not the authority on 400 but had some good success for my own build and also Kidglok's transmission.


Posted from the TurboBuick.Com mobile app

 

[nonoss38]

Were are you located?
To be honest I'm not the authority on 400 but had some good success for my own build and also Kidglok's transmission.


Posted from the TurboBuick.Com mobile app

Nebraska. I am not afraid to ship it out . Thanks again.