When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a 76 F150 with a 390 topped with a New Edelbrock AV2 carb. Backed by a C6 transmission. At normal driving lower rpm it ****s perfect, but if you take off faster than normal it won’t shift to the next gear until 4K rpm. How do I adjust that to be around 3500 rpm?
Sounds like your throttle and trans kick down lever need adjusted. Did you have to get an adapter to get it to work with that carb? Must work fine on 2bbl, but at WOT the kick down is not working right?
Adpt. PN2732 Must Be Used When Installing On Certain Intakes~Will Work w/Ford Auto OD Trans (AOD) When Used w/Lokar Bracket SRK-4000
Liter: 6.4
CUI: 390
Only other idea is to ck your trans modulator.
"Check the vacuum modulator and the line that goes to it. Check the line for kinks or other problems, make sure it hasn't come off. If the line checks out, take the line off where it connects to the modulator. If trans fluid leaks out, its bad. If no fluid, it still could be bad. They're simple to replace, disconnect the vacuum line, remove one bolt that holds the clamp in place and the modulator comes out. It has an o-ring seal. Modulators are identified by the color of the stripe. Pretty much the "go to" one is the black stripe. If they don't show that one in the catalog, go with the green stripe. Avoid the pink stripe. That one is a dual diaphragm version that has two vacuum line going to it. If by chance you have one of these, replace it with one of the other two and use the vacuum line that goes to direct manifold vacuum, cap the other line.When you pull the modulator out, be careful. There is a pin that goes in the modulator. Sometimes it comes out with the modulator, sometimes it stays in the tranny. If it comes out, don't lose it."
