TH400 shift points

[RockHQ]

Okay, I replaced the shi**y 2-barrel holley and intake manifold on my '79 C-10 to an aluminium spreadbore intake and a Q-jet with a 1" spacer. Feels like a different engine altogether. Now i would like the tranny to shift a little higher in the rpm range at WOT, what's the best way to do this?

Thanks,

-Axle

[r0lf-]

Well... A nice shift kit might help you out. Chirping tires would definitely bring a smile to your face.

I have a Towing kit in mine and it still barks 1-2. It shifts a little too high for my cam though.

[RockHQ]

Lol thanks for the support but this old 350 will be replaced with a mean 468 BBO next spring. I just hated the mileage and lack of power so i swapped intakes and carbs.

I'll be more specific here. The transmission shifts firm enough, but at way too low RPM. Probably because the truck had a diesel and was converted, most likely using the original th400 and torque converter. Is the governor where i should be looking at?

[Cole's 87]

I'm not sure if your talking about the 1 gear govenor. " you can still have the gear shift in 1st and it will shift to 2nd"

To get rid of mine I used a Trans GO shift kit with the manual/ automatic feature.

http://store.summitracing.com/produc...earchtype=ecat


If your just wanting to adjust the shift points a little this kit from B&M will do the trick

http://www.jegs.com/cgi-bin/ncommerc...97&prmenbr=361


Hope this helps

[swervin ervin]

Yes, the governor is what you need to work with. If you can get one from a gas truck, or car for that matter, it will raise the WOT shift points. You can also buy spring and weight kits to adjust shift points.

[RockHQ]

Thanks! I'll order that TCI kit, probably the cheapest option.

[MylilBowTie]

Try adjusting the modulator valve. I know they say it only increases or decreases it a couple of mph. But with mine I got it shifting out of 1st from 15 to 30. I still need to adjust it I turned mine in all the way and I guess it was all the way out almost. It hits a lot harder going into second. One more thing I noticed is that it raised the shift points and the rpm range. For mine to shift it has to be around 26-30mph @ about 3,000 rpm. I have a transgo Shift kit in my used "rebuilt" th400 that I picked up. I was told it was rebuilt but Im not so sure of that, it works but not like it would if it had been rebuilt.