Slow 1-2 At Part Throttle

[alocker]

I need some help with my painfully slow 1-2 shift at part throttle. When leaving from a stop smoothly, it just takes too long to shift. If I continue to roll into it, it takes even longer. Heavy and full throttle situations it shift firm and very quick. No flaring or slipping has been observed. I dont recall the servo setting but it was within .020 of recommended.

How can I quicken that low throttle 1-2?

I have a CK shift kit, CK servo, wide black band. I went with the low HP accumulator spring setup like stock. Not sure if this matters for part throttle shifts.

 

[TexasT]

Was the shift delayed before the modifications were made? Did you make all of the mods at one time?
2-3 and 3-4 shifts where you want them?

Posted from the TurboBuick.Com mobile app

 

[alocker]

Was the shift delayed before the modifications were made? Did you make all of the mods at one time?
2-3 and 3-4 shifts where you want them?

Posted from the TurboBuick.Com mobile app

I never used the trans before I built it. The other shifts are ok. I am still tuning the governor but I am close, I only need to go about 200 RPM higher. As far a shift quality, I like the 2-3 and 3-4.

 

[alocker]

I got a chance to beat the new combo around with some decent weather. I removed nylon governor spring screw and added a 3/4 stainless allen head bolt to add some weight. I went around the block and it would not shift out of first. So I drained everything again and found the bolt head is too long and was interfering with the case so the small weight could never fully extend. I ground down the head and buttoned it back up. I also added a heavier spring to the small weight and put in a light spring for the heavy weight (they are all very light but I did not have one before and figured it could not hurt).

Bam, 1-2 shift is right at 5800 which is good for my combo. I also plugged the 1-2 accumulator and it feels great. Not harsh with the 3000 stall but a very fast shift with no drama or banging. My new issues is the 2-3 shift that is not happening at 5800 and I dont want to rev much higher. I hear this is common though and I will have to research to change that.

i appreciate the suggestions. I am really starting to like the trans. These are a pain to set up but when working right they are a lot of fun.