trans. linkage help please
Question:
I recently bought an 86 model GMC 4×4 with a 400 small block and a 700R4 trans. It has an Edelbrock Performer Manifold and an Edelbrock 600 4brl carb. The truck shifts normally with slow/steady acceleration, but seems to shift early under heavy acceleration. It also doesn’t downshift into a low enough gear at highway speed when accelerating to pass (only down shifts out of O/D). Please advise any corrective action I might take to remedy this. Thanks, Kent
Response:
Kent, the tranny "kickdown" cable may be out of adjustment. Remove the aircleaner. On the drivers side of the carb should be a cable running back towards the rear of the engine. If you have small hands, reach down under where the cable goes thru a plastic adjustment bushing. On the drivers side and back and below this bushing is a small release button that will allow the bushing to slide back towards the firewall. Push the bushing back while pushing the release button. When you have it pushed all the way back, get in the truck and push the gas pedal all the way down. You will hear a ratcheting sound as the bushing is pulled back toward the front of the engine. This is a starting point for further adjustments. Drive the truck. Adjust a click or two each way until you are happy with the way it shifts. Also for anyone who wants crips "right now" shifts out of your 700R4 you can replace the 1st/2nd shift solenoid with one from the same year Corvette. Makes a world of difference during hard acceleration. I did all of the above on my ‘87 K5 and it’s like a different truck. — You don’t shoot to kill. You shoot to stay alive.
– Hide quoted text — Show quoted text -> I recently bought an 86 model GMC 4×4 with a 400 small block and a 700R4 > trans. It has an Edelbrock Performer Manifold and an Edelbrock 600 4brl > carb. The truck shifts normally with slow/steady acceleration, but seems to > shift early under heavy acceleration. It also doesn’t downshift into a low > enough gear at highway speed when accelerating to pass (only down shifts out > of O/D). Please advise any corrective action I might take to remedy this. > Thanks, > Kent
