new tranny lazy going into gear

[johnmc]

hi guys this is my first post and you guys have a very nice site. I hope someone will chime in .
I have been building this truck for my daughter. for about 6 months. I just got out rebuilt monster transmission running. when I first put it in gear it jumped into forward and reverse very firm and quick. I went around the block first gear then it went into second it was ok nothing strange. The truck is not reg. yet so i cant go far. next day went out for another lap it was fine. one week later went to move it and it acted like it was in neutral for 6 seconds or so then the same for reverse . i went up the road and when i let off the gas the truck free wheeled like it has no engine brake. but if i gave it gas it didn't move till i was on it up around 1500 rpms and jumped onto gear. it was not the same as the first trip around the block.
this transmission is a turbo 350. this is such a set back.
here is the specs. she wanted a mud truck
1977 k5 pickup
305 tuneport injected
turbo 350 2,200 stall eatmyshift.com monster transmission
205 transfercase
4 inch spring lift
3 inch body lift
35 inch bogger tires
4.10 with rear locker

 

[Swims350]

fluid level good?

shifter adjusted right?

modulator line hooked up and working no leaks?

 

[johnmc]

fluid level good?

shifter adjusted right?

modulator line hooked up and working no leaks?

fluid is full,shifter feels fine,and the modulator hose is on and looks good.I just put this tranny in. this stinks i bought the tranny 6 weeks ago and just got it in. is there a port to check pump pressure ?

 

[towman]

don't have a answer for you on this, welcome to the site and i see you on slow plowing contractors also, i go by towman there also

 

[johnmc]

don't have a answer for you on this, welcome to the site and i see you on slow plowing contractors also, i go by towman there also

small world thanks .

 

[Swims350]

yea there's a couple plugs on the PS of it that can be used to check pressure.

Honestly the mod line is easy pull it off and check for any leaks by blowing thru it. see if the mod holds vac. with a hand vac. pump.

Then adjust the shifter linkage or cable. it sounds alot like when it's low on fluid, but if the pump is down or something it'd do the same thing I'd think.

 

[johnmc]

I will do a little more research today. I will get back to you guys this afternoon. thanks for your help.