Th400 swap help please

[chevyforlife502]

My truck had a 305 backed with a th350. I am in the process of swapping a 350 and a th400. What is need for this swap? Is there any electronics that have to be hooked up. Or is it all vacuum off carb or....

 

[76zimmer]

what year is this truck; early 80's?

The T400 has an electric switch on the accelerator pedal to activate the kickdown for a lower gear. Is this a 4WD application?

 

[GNEEnterprises]

The output on the T400 will be different that the T350 (32 spline vs 27) and the bolt circle will be different to the t-case adaptor. You can swap the input shaft on the t-case to 32 spline.

 

[sweetk30]

move the trany/tcase crossmember back few inch and drill holes to bolt to the frame.

 

[chevyforlife502]

the truck is a 79 and yes it is a 4x4 more info could have helped you guys. I already have a new adapter and a 205 and the cross member to go with the Tranny.

Dont know the year of the tranny.

 

[76zimmer]

So what t/c do you have right now?

If you change the overall length of your trans/transfercase combo your driveshaft length will change too. If your changing transfer cases from a 203 to a 205 you will need to do something with your front hubs, with a 203 they are engaged full time.

 

[chevyforlife502]

The tranny came with a TQ when i traded the guy. My Dana 60 came out of the same truck as the 205 T case so i should be fine in the Hub department.

So what do i need and need to do to hook up the electronics on the tranny?

Thanks for all the help guys

 

[sweetk30]

gas pedel switch and bracket .

orange wire from switch to fuse box and then threw firewall to tranny . simple 1 wire setup.