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Old 12-27-2008, 12:35 PM
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Transmission Fluid Spraying out of the Dipstick tube

I pulled a th400 from a 79 1 ton chevy truck and put it behind a 454 in a 84 half ton 2wd shortbox pickup. When I did the swap I put a B&M shift kit in the truck. I did as the kit said for the street strip kit and pulled the big spring out from under the piston and removed the three checkballs (out of 6) and the transmission was upside down on the stand so I didn't use grease to hold them in place while I bolted on the valve body.

So I installed the transmission and it had no forward or backward movement. I pulled the pan and realized I had forgot to connect the gear selector to the manual valve. So I connected it....Now here is my problem.

When the truck is cold it acts like it doesn't have enough fluid. It will only start moving if you rev it up to around 3500 RPM. Then it will act normally. But once it warms up it will engage in the gears right away (idle). But also when it warms up it sprays tranny fluid out of the dipstick tube and all over the motor. It doesn't leak anywhere else.

What do you think is the problem? Is there a check ball stuck? Should I have left that spring under the piston cup? Even though the instructions said otherwise? Here is a link to the instructions.

http://www.bmracing.com/bmracing/ins...9500019-11.pdf

I have done 4 of these kits before and never had problems so I don't see how I screwed this up. Those were on TH350's though.

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Old 12-28-2008, 01:08 AM
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Old 12-28-2008, 07:53 AM
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I would suggest you re-visit the complete install of the kit.

the spring under the accumilator piston has nothing to do with fluid shooting out the filler tube unless you left the servo piston and related parts out.

I've seen hundreds of similar TransGo shift kits installed with no problems.
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Old 12-28-2008, 02:50 PM
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Sounds to me like the vent is clogged.
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Old 12-28-2008, 02:57 PM
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Is it over filled with fluid. Check the level.
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Old 12-30-2008, 05:34 PM
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I thought the same thing about the fluid being too full, but the truck acts like it doesn't have enough fluid.

And I checked the fluid and it seems like it is pretty close. Although I suppose there is a chance I have a TH350 dipstick in there. Is there a difference?
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Old 12-30-2008, 05:43 PM
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Quote:
Originally Posted by Crosley
I would suggest you re-visit the complete install of the kit.

the spring under the accumilator piston has nothing to do with fluid shooting out the filler tube unless you left the servo piston and related parts out.

I've seen hundreds of similar TransGo shift kits installed with no problems.

I definately put the other servo parts back in. The only part that was left out was the spring. Is there a chance that the assembly got bound up when I reinstalled the valve body?

Obviously I am not clear on how the fluid travels through the transmission, but I understand the theory of how they work and what the kit does to improve shifting.

Unfortunately I am leaving for School in NC soon and can't take the truck with me but I would like to get it fixed before I sell it or put it in storage.

Thanks for your help
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Old 01-01-2009, 03:14 PM
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I found that when I reattached the linkage to the manual valve i had to drop the valve body down less than 1/4 inch and when I did that one of the check balls moved to a different position. I moved it back and it works fine now.

Thanks for the time of those that responded.
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