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Old 06-14-2013, 10:57 AM
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3 transmissions in a month

Hey guys I could really use some help and input on my problems I have been having. About two months ago I put in swamps 200cc injectors in my truck with their tuning. My Ford HD tranny went out about 3 weeks after the injectors. I installed a stock used tranny with 88k on it and it lasted less than 3 days. I purchased a Heavy duty billet built transmission from one of the highly recommended tranny builders ( I don't want to mention the name because I don't want this to turn into a BTS v.s. Woods v.s. Suncoast v.s. ATS debate) It was a great choice and I know the builder is going to take care of me. Anyways my question is all three of these transmissions went out in the same way and I am wondering if it could be a pcm/ tuning problem causing the failures. Heres how it happens

Tranny #1 115k
The 1st transmission (HD Ford with 115k) went out while I was climbing a fairly steep hill in the middle of a hay field and just started slipping. I started to head back to town and it didn't want to upshift into 2nd gear it just revved out in between 1st and 2nd. I let off of it and it shifted and shuddered really bad I am surprised I still have a rear end.I made it about 3 miles and I lost all forward clutches and had good reverse.

Tranny #2 88k
I borrowed this from a good friend to try and get me by until the builder could get my built tranny built and shipped up north to me. Well this tranny lasted about 3 to 4 days less than 200miles and it went out pretty much the same exact way. While it went to upshift it slipped going up a on ramp I let off and continued about 800yds and it started slipping and shuddering really bad on the highway. I lost all forward gears and had reverse.

Tranny #3
Brand new Billet shafted built to the nuts Tranny 150miles
Well I got my awesome new tranny and it was working great until I hooked up a load of cows and started to haul with it. I didn't feel any shudder while pulling,good firm shifts it was pulling great and I was happy. Until I started up this steep a$$ hill It was in 2nd and as I was pulling the hill it went to downshift to 1st and it SLIPPED in between shifts. I made it probably about 5 more miles to the next big a$$ hill and I put it into 4LOW and made it about 200 yards up the hill and I lost all forward gears. I put a pressure gauge on it and I was getting 190 psi stalled in forward gears and around 300psi in reverse. While I was stalling it and checking pressures The Front clutches seized together giving me forward in N D 2 1 gears and of course no reverse because it was fighting the seized up forward clutches.

Anyways now you know the story

The highest I saw for temps was about 185* to 190* on all three trannys. The builder said the pressures match exactly where he would like to see them but my only concern is I can't replicate the 1 to 2 shifts to see if the pressure is doing anything funny there so that is what has me worried at this point. I am thinking that maybe the tuning is causing the problems just because swamps has a lot of tranny tuning in with their tunes.

How does the computer control the shifts?
What should the psi be doing when it is shifting?

COULD this a Pcm problem,or a tuning problem?
Should I go with a stand alone Tcm like a trans commander or Co pilot?
What are your thoughts as to what this could be?
Sorry for the long post and Thanks for the help in advance.
KYLER
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Old 06-14-2013, 12:06 PM
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whar are you running for a torque converter?

you didn"t reuse the same one all 3 times did you?

i know a bad/improperly seated torque converter can kill a transmission quick and i see no mention of a new one.
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Old 06-14-2013, 12:36 PM
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Quote:
Originally Posted by alaskan155 View Post
whar are you running for a torque converter?

The converter in the built tranny is a custom triple disc billet converter built for the trans builder I really don't know who makes it for him. But it is a piece of art that's for sure! He might even do it himself

you didn"t reuse the same one all 3 times did you?

No, the 1st install was a new one, second a used one that came with the tranny, and 3rd a triple disc from the builder. I will just say that there is two guys I would buy a trans from and they are John Wood or BTS. And they both know their trans

i know a bad/improperly seated torque converter can kill a transmission quick and i see no mention of a new one

I'm sure the converter was seated all the way. .


Just to clear up the confusion I got 115k out of the 1st tranny, around 200 miles out of the second tranny and around 150 miles out of the 3rd tranny.

thank you kyler
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