AT1545 thread

[turf]

i'm going to remeasure now to be sure. but i think:

the TC (41mm)+adapter ring(41mm) measures about 82mm, protruding from the transmission case on the AT545

on the AT1545 the TC alone sticks out 69mm.

from the mechanic's tips link above. it looks like the total could be anywhere from just over 81mm to 86mm

so, 82 - 69 = 13 mm =1/2"

a big half in will work. 5/8ths even. to be exactly the same distance as the AT545 sticks out.

i see what you mean by averaging the 2 sides, the TC leans a bit

i'm hopeful the parts guy scores on the CAT3116 tip. their shop has been good to me, and i pay for it.

[turf]

dang it, now i'm confused.

jatzy, you're right. my measurements or math went wampus

here is the AT545 with the adapter



here is the AT1545 with the same adapter



545 is 3 and 3/4" - 95mm
1545 is is 4 1/4"- 108mm
so if the old ring is 41mm, 41 - (108-95)=28mm adapter

41mm - 1.6" old spacer

looking for a 28mm or 1.1" adapter

[cadillackid]

im assuming you made sure both converters are full seated? you are measuring near the top.. what if one converter is sagged slightly.. that skews the numbers..

-Christopher

[turf]

i don't know why i said Jatzy, i meant the cadilackid!!!

thanks for your help! im trying hard to absorb everything.

the old trans TC seems to droop a bit more than the new one, i'm hoping the droop is relative on both.

they are hot as heck right now, but i try and reseat the TC tonight. i think i had it down, over 2 sets of splines but i'll it try again.

the pilots on both are the same, about an 1 5/8".

here are the TCs side by side.




my mistake was i thought the ring should have been the 108-95 = 13mm. i forgot to subtract that from the spacer.

[cadillackid]

there we go thats a great pic of them side by side..

so with the difference and using the one ebay ring (one that shows 10 available and 2 sold but has no phone number)..
if you were slightly too short on the 1545 by a 1/4" - 1/2" when the converter is popped all the way seated, you should be fine as you can safely pull the converter out that much. you can see the ears that spin the pump and need to have some contact with them.. but I know my converter dropped back at least 1/4" when I pulled out my 545. I pushed it back into the transmission on the 1000 also and it was a 1/4 - 3/8 or so..

so if that new ring was 1/4 short you would still be fine..
-Christopher

[cadillackid]

theres 3 things that must happen..

1. both sets of splines are engage and at a good bite so not to bend them or twist them off.

2. the ears on the converter hub need to engage and spin the front pump

3. the ears need to be behind the seal.. so its solid shaft at the seal as to not have a leak.

-Christopher

[turf]

thanks,

i went out there and felt like i knew what to do.

turns out my AT545 measurement was wrong, it wasnt seated. the 1545 is. and now they both are.

here is the 1545, with the TC ears engaged.



right at 4 1/2" - 114mm

here is the 545, with the ears engaged.



right at 3 1/8" - 79mm

114-79 =35mm

41mm spacer

my target is 80mm

the 1545 without adapter



2 5/8" or 67mm

i need 13mm - 16mm adapter

that would put the new total 80-83mm

did i do that right?

[Booyah45828]

Measure how deep the flywheel sit in the housing(flywheel surface to where the trans bolts)

Take that measurement and subtract it from the 2.715- 2.875 spec in the book.

That is your spacer requirement.

[Booyah45828]

Looks like you've already done what I said.

Your flywheel housing on the back of the engine is sae #3 right? If it is, take the measurement you took in post 25(looks to be 3") and subtract the converter protrusion spec.

If your housing is Sae #2 size, and you need to utilize the spacer ring to adapt the pattern down. Include that ring in your first measurement (spacer ring+flywheel depth-converter protrusion).

[Booyah45828]

And if I'm reading the tape measure from your picture correctly, and doing the math correctly, that 1/4 spacer off of ebay would be what you want.

If that spacer is too much, install studs into the converter and space it out with fender washers between the converter and the flywheel. Use the fender washers because they have a larger footprint then a flat washer.

Too tight of clearance is just as bad as too loose. Make sure when you install it that the converter can slide forward and backward freely otherwise you'll ruin the pump in the trans or the thrust bearing in the engine.

[turf]

Originally Posted by Booyah45828

Measure how deep the flywheel sit in the housing(flywheel surface to where the trans bolts)

Take that measurement and subtract it from the 2.715- 2.875 spec in the book.

That is your spacer requirement.

i just tried a straight edge across the bell housing and measured.



so
3.25"
minus the 2.875 =.375" (3/8th") = 9.525 mm

minus the 2.715 = .535 = 13.5 mm



thanks!!!!!!!

[turf]

i just heard from stuart/steveson and they sent me a file.

this appears to give the part number 23016290.

here is the pdf from stuart

https://www.dropbox.com/s/nxp8h6fp3hyklbi/isb.pdf?dl=0

anyone care to confirm that?

can you read a measurement off of that?

[Booyah45828]

There you go. You need a spacer between 9.525 mm and 13.5 mm. I'd go with the smaller of the two.

I didn't see any dimensions that would tell you the height of 23016290.

All the pictures that I find show it's way too tall though, looks to be almost an inch.

[turf]

the parts guy just replied.

"Overall length end to end is 14.5”
1 9/16” tall (sitting on counter)
6 Bolts center to center 10.5” (outside to torque convertor)
6 bolts center to center 11.5 (backside of plate)


so the math 1 9/16" = 1.56" = 39.6875mm

the one i have is 41mm, this doenst look right.

[cadillackid]

since these parts books seem to be coming up "wrong".. see if theres a number on the converter of the 1545 and verify that its in fact the correct converter for the 1545 in a diesel application.. make sure the converter didnt get switched at some point.
-Christopher

[turf]

Thanks Chris,

i did.

http://www.kingomatic.com/King-O-Mat...ue-For-Web.pdf

on page 50, my old converter is the second one, the new one is the third one.

it has a bit higher stall speed, maybe launch that bus better.

maybe its the third one..... the code is 275LU on mine, i think the LU is lockup

[cadillackid]

looks like that might be the case.. even though it says non lock up in notes.. to me the LU seems lockup.. the TC-290 was the most common converter for the 545s.. esp the later ones...
-Christopher

[turf]

i was looking at that print from stuart stevenson

in the title block in very small letters it says "AT500 Series". because of the similarity of the drawing to what i have, i suspect this drawing does not include the AT1545 in the AT500 Series.

i also watched and learned a **** ton about Torque converters. watch a few hours of video of them, i liked it. the lockup is going to be a fatter converter than the non locking.

i've seen a school bus thread saying that you couldn;t just swap the locking tc into the 545, but since the lockup is internal and mechanical, im not sure why not.

that ford adapter is looking more and more like the ticket. even if it needed a bit of shimming.

[cadillackid]

the reason you cant swap a converter into a 545 is that there is an actuator valve inside the transmission to engage the clutch, most transmissions are mechanically designed to not allow fluid pressure to the clutch circuit till at least 2nd gear.. I think the 1545 locks in 3rd and 4th. some even unlock based on the modulator piston position.

ive not looked at the 1545 specifically for how it actuates the clutch.. if you look at the front shafts on both transmissions you'll likely see the difference and part of that will be the clutch actuation mechanism.. I dont think the 545 has the capability.. otherwise it might possibly just be a valve body and converter change..
-Christopher

[turf]

i got the ford adapter ring today and its not going to work. its too big.

back to the drawing board.

part numbers that don't work:

3916222
3916223
23016290



grrrrrrr






if you got 20 minutes and want to learn about torque converters, here's your video.

https://www.youtube.com/watch?v=pTfipsejqS0