Join Date: May 2009
Location: great falls mt
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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.
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.
2001 Ford f250 7.3L ccsb lariat
4in air bag lift
Swamps and php tuning
Bts twin hpop
John woods street trans
Ceramic coated 38R w/ WW2
Ceramic coated Bellowed upipes
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295/65/20 trail grapplers
2013 F250 cclb Kodiak Brown.