[Gearjammers]

I have recently rebuilt Turbo 350 I am not new to automatics I have done several in the past. Mostly T400 and 727, This was my first 350. Everything went together real nice as it is supposed to. I used a B&M transkit and a B&M Transpak shift kit, installed a transmission specialties converter 3000 stall. Car has a solid 450hp 350 and is in a 72 Chevelle with 308 rearend. What is happening is the car shifts really soft, it doesnt slip just nice soft shifts like my wifes minivan. I thought maybe it was the modulator replaced with a new B&M unit and same results. I disconnect the modulator expecting full line pressure at all times which should give me hard shifts. However shifts remain the same and will not shift into third when left in drive unless I pull lots of rpm's. Also tranny will not shift down into 1st stays in 2nd when stopped.If I am shifting the car it will shift into third and I can shift it down into 1st as well. Once I reconnect the modulator it shifts properly manually or in drive just soft. This is the first B&M shift kit I have used, If I was trying to build a nice smooth shifting tranny I probably would not get results as good as I have got with this build. Even at 6800 rpm it is nice and soft. I want second gear rubber! Any help is appreciated Thanks Jamie

[Crosley]

the trans pak has differnet levels of setup.... how did you set this tranny up with the kit?

how many check balls installed?

were all the springs installed per instructions?

Were the PR valve and boost valves free in the bores?



usually with B&M shift improver kits the complaint is HARD shifts.

You do know the stall speed converter will soften the shift 'feel' up a bit??

[Gearjammers]

Yes I am aware of the converter dampening effect. I installed 2 balls as per instructions for competition shifting, all valves seemed to be free in their bores no problems removing or installing, and I installed or removed all springs as per instructions.
Thanks Jamie

[Crosley]

Originally Posted by Gearjammers

Yes I am aware of the converter dampening effect. I installed 2 balls as per instructions for competition shifting, all valves seemed to be free in their bores no problems removing or installing, and I installed or removed all springs as per instructions.
Thanks Jamie

remove the v-body.... only install 1 check ball . The ball near the modulator valve is installed.

Modulator valve is in front of the vacuum mod cannister you replaced. The ball must be there.

[Gearjammers]

Thanks for the help I will try that as soon as I get the car back.

[matty_torana1978]

Try using ford type f trans fluid, it has a high friction coeficient. My turbo 350 skids into top gear with only a 320 hp engine.