CudaFactHackJob
Well-Known Member
I tried ta tell efferbutty dere's gunna beez prollems when they gave TF's freedom of choice...but nobutty listoned.
904 Transmission, no 3rd gear shift.
- Thread starter C2ndLTpigeon
- Start date
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Just wondering if u got all the sealing rings on the shafts. Were they Teflon or steel? Did u take any pics? Did u have the vb apart? Cause if u have the wrong size ball in the wrong place u won’t have 3rd gear. Kim
Here is what I mean. I included other pics so u can check to see if u got the valves in right. This is TF-2 shift kit instructions just for comparison. Look at the last pic first. Idk why some are upside down. Kim
C2ndLTpigeon
Mopar or no Car!
Thanks for the pics. I took the VB apart and put it back together in the exact same order. Still nothing with 2 valve bodies. It's got to be something else. I made sure the sealing rings were on good with assembly grease. And most where steel seals and not to many Teflon.
CudaFactHackJob
Well-Known Member
You could have had that trans out and tightened up that direct clutch clearance TWICE already...it's ain't no ring or seal causing this problem...
C2ndLTpigeon
Mopar or no Car!
Nah, already got my cores, I'm good.
CudaFactHackJob
Well-Known Member
How soon will you have it apart; so we can all know what the problem actually is?
C2ndLTpigeon
Mopar or no Car!
Probably in a week or so maybe 2.
One of the cores I picked up looked great, decoded it as a 1971. Going to build it and swap it then take the other apart. If its simple ill have a spare or for another future project. Just nicer to have it in the car like I mentioned so it doesn't use up my garage space on jack stands. My wife likes her parking spot.
One of the cores I picked up looked great, decoded it as a 1971. Going to build it and swap it then take the other apart. If its simple ill have a spare or for another future project. Just nicer to have it in the car like I mentioned so it doesn't use up my garage space on jack stands. My wife likes her parking spot.
CudaFactHackJob
Well-Known Member
What's the PK #?
C2ndLTpigeon
Mopar or no Car!
C2ndLTpigeon
Mopar or no Car!
Okay so here's a little bit of an update, I drove the car around a little bit today and it will shift 1 to 2 at a gradual speed and then eventually when it wants to go into 3rd on easy acceleration is when it slips into what I call a false neutral and just revs.
But if you had a good amount of speed and when it decides to go into 3rd and does this false neutral if you apply more gas it will go into 3rd so it seems it does not want to go into 3rd at easy throttle.
I believe I have my throttle pressure linkage setup correctly to where wide open throttle the lever is all the way back on the transmission.
But if you had a good amount of speed and when it decides to go into 3rd and does this false neutral if you apply more gas it will go into 3rd so it seems it does not want to go into 3rd at easy throttle.
I believe I have my throttle pressure linkage setup correctly to where wide open throttle the lever is all the way back on the transmission.
CudaFactHackJob
Well-Known Member
Says 81,82,83 non-lockup? I'm still thinking that the direct clutch clearance is way too loose. Or you have so much end play that the direct drum feed holes aren't lining up with the space between the rings...or there's ring wear inside the direct drum. If it's worse when hot, it's ring seal. By the way, the closeness of that kd arm to the shift arm is scarey. If the kd arm connector is low, and the shift arm connector is high, then hitting the gas will push it into reverse.
C2ndLTpigeon
Mopar or no Car!
Thats why I chose to build another core in case something is worn. The one I tore down is in excellent shape.
As far as the lever, I took that pic before I even did the valve body. It's been raised since then. I had that happen once, not fun!
CudaFactHackJob
Well-Known Member
So..the two dimensions I'm wondering about are end play and front clutch pack clearance..?
C2ndLTpigeon
Mopar or no Car!
Well the new transmission is in. I rebuilt it just like the other except this one has all 3 gears. I will begin to take the other apart and see if something was off. Either way I'm glad to new one worked out. Here are some pics of the build.
Great job. Glad U got it done. Kim
Heck yeah man! At least you got it goin again. Nice work. Do let us know what you find though.
It's nice to know you have a working transmission now. A few comments about your original 904. According to the date code, the transmission came from a 1982 vehicle. It really doesn't matter because the 1981 and the 1982 904's were identical. There is a reason why you noticed a harsher shift when you put a 70's valve body into a 1981 and later 904. Chrysler made some changes in the transmission case and valve body in 1981 to reduce the hard shift while going into reverse. Seems like there was a technical bulletin issued many years ago about not interchanging 70's and 80's valve bodies.
CudaFactHackJob
Well-Known Member
Is the PK420 trans the silver one in the last group of pics? That doesn't make sense. That silver one looks to be a pre-71 trans because the casting in front of the rear servo is further forward than the later ones I've seen. I always watch out for mis-matched case/vb combos.
C2ndLTpigeon
Mopar or no Car!
Yes the PK420 transmission is the silver one, it was in the car along with a 1981 Cast year slant six in my 75 Dart. I could never test the transmission when I bought the car since the engine had 3 sticking intake valves and the cylinders were so worn. First thing I did was pull both and rebuild. Not sure what was done to it in its life so anything is possible.
Reason why I went with getting 2 older core transmissions. The seller pulled them from a duster, and Demon and were sitting on a shelf since the 80s The 71 looked to be in the best shape but the best part is they had not been messed with yet.
As far as shifting in this new one (blue one) it engages in reverse alot smoother and responds to all gears.
CudaFactHackJob
Well-Known Member
That's so weird that the silver one is a PK420. The case looks like it takes a non-PTK valve body. Is that non-ptk the vb for it on the purple towel? I thought all tf after 71 had the PTK, but I'm really beginning to wonder. I just picked up a later case PK360 with the longer casting by the rear servo, but it didn't have ptk. The vb matched but no ptk on it. I'm trying to assemble a database to figure out which trannss had ptk based on PK#.
C2ndLTpigeon
Mopar or no Car!
You might be getting confused, the Silver one is the problem transmission, and the pictures of all the parts laid out and being assembled is the new one. those pics are before I painted it.
C2ndLTpigeon
Mopar or no Car!
This is the bad trans, PK420
CudaFactHackJob
Well-Known Member
Ok I see the difference in the low reverse band adjuster. And did you try two different valve bodies in that one? Do you have pics of them from the top; where they meet the case?
C2ndLTpigeon
Mopar or no Car!
I can get some when I get some time to take it apart around Monday Tuesday
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