New Transmission

Topic: New Transmission (Read 1479 times) previous topic - next topic

New Transmission

January 17, 2008, 01:45:39 AM

Mine quit working on me in a pretty tight spot so I had to scramble to get it running again but it works. I do have some questions tho. I have a bunch of numbers from both transmissions that I don't understand so I was hoping someone here could help.
The new trans had a 53 at the top of the "bell", the tailshaft housing had RF-EOAO-7AO4O-BD cast into it. There was also a tag that read PKA DV1 117248 F25 F1SPAA attached to the tailshaft housing.
The old one had 59 on the bell, same number cast into the tailshaft housing, but the tag read PKA DR2 047987 E1O E8SP AB. Some O and 0's could be mixed up no way to tell which is which. The new tranny came out of a 91 cougar with a 3.8 I reused my speed sensor and my converter, I also had to swap over some of the linkages but the main one was fine thanks to my hammer shifter.

New Transmission

Reply #1 – January 17, 2008, 09:00:53 AM

sounds just like what i did, so far the only problem i'm having is showing speed at a stop. i got the 54 stamped stransmission which replaced a 31x, swapped over the tailshaft housings and i was good (mainly b/c i got digital speedo and the 54 tailshaft (dont know the numbers on the tail housing) was also about an 1inch longer. although i used a new tq converter tho in my build

New Transmission

Reply #2 – January 17, 2008, 03:32:08 PM

You can worry about those large numbers on the bell if you want, they mean nothing...

The Ford model numbers are the PKA DV1 & PKA DR2(PKA is a AOD basic model number)... It will take a Ford shop manual to tell what the differences are... And if they are minor enough, probly won't even be mentioned... Often just a minor valve or spring change in the valve body...

The longer tail housing will probably have a Lincoln casting(engineering) number while the shorter housing(E0AO) has a Ford number...

New Transmission

Reply #3 – January 17, 2008, 11:33:34 PM

It only has a couple of issues one is that my trip odometer said that my 290 mile trip yesterday took only 260 miles. The speedo might be off too because my speedo read 70 , the speed limit, and I was passing everybody like I was doing 5-10 miles over the limit. It also had made my car slower as it likes to shift at 3k under WOT. I had to try it out :D

New Transmission

Reply #4 – January 18, 2008, 07:02:28 AM

That means that the speedo gear on the outputshaft of your new trans does not have the same number of teeth as your old one, and your new shift point is from having a different govoner.

New Transmission

Reply #5 – January 18, 2008, 10:00:32 AM

yeh thats similar what happend to me. the speedo gear is the same but i think the way its cut is different. the shift points also moved from 4500rpm to 5500rpm. also it shifts like it has a shift kit (came off the back of a built 302) i think im ganna use my gps to check mine b/c while its showing speed at a stop, it seems legit at cruising speed, but it does seem i have to go FASTER than i should to stay with people but everyone speeds around here.

New Transmission

Reply #6 – January 18, 2008, 07:38:43 PM

AC, your speedo gear on your sensor may be the same, the problem is, it sounds like your speedo is reading too fast, say it reads 67 to keep up with 55MPH traffic. The speedo gear inside on the output shaft is the one I was talking about being different, they came in 7 tooth and 8 tooth flavors.

New Transmission

Reply #7 – January 18, 2008, 10:42:01 PM

well i dunno i noticed that when i went by a cop today on the interstate, everyone was running 75 and my speedo said 75. its like at around 30mph while stopping it just starts updating like 6 times every second to 1 time per second and its spitting out the numbers in order that it read, just at the 1 second intervals so when i get to a stop i see 24-13-6-0 after a stop. at any cruising speed and passing speed its on the mark otherwise. i dont like to ride my brakes and warp cheap rotors so a quick stop works best IMO. ( i know it can cause it to crack but i never have brake fade.)

i just realized (stupid me) it is a different problem but related by being a problem with a new transmission.

New Transmission

Reply #8 – January 18, 2008, 10:52:59 PM

You know whats fun? Watching Greg's turbo cat skip the digi speedo by 30mph :) That was really fun.

Swapping your speed sensor over to the new transmission only changes the driven gear. The driving gear on the output shaft is different. For some reason I'm thinking its 7 teeth on the older ones and 8 on the new ones? Or is it 6 and 7...