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  #1  
Old 09-30-2014, 08:18 PM
JW-9 JW-9 is offline
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Default Direct drive coupler wanted

Anybody have a direct drive for a 904 for sale or know the best place to buy one ? Thanx
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  #2  
Old 09-30-2014, 10:28 PM
moparracer moparracer is offline
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Try Coan Racing. They built the direct drive converter for our Hobby Stock, I'm sure they could do a coupler easy enough.
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  #3  
Old 10-01-2014, 06:16 PM
MOD 50 MOD 50 is offline
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Falcon Transmission here in Colorado built mine..719 683-2159 ask for Gaylen.. tell him Bob sent you..
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  #4  
Old 10-01-2014, 07:36 PM
JW-9 JW-9 is offline
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Thanx mod 50 . How much was it and how long it take to get it ?
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  #5  
Old 10-01-2014, 09:29 PM
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I don't know how much, mine was the first one he built and i have ran it 3 years in a heavy stock car...... he is putting another one together for me so it might be easier/faster for him to do 2.
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  #6  
Old 10-06-2014, 10:27 PM
340king 340king is offline
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Coupler

My 727 coupler came from TCI and my 904 came from JVX. I purchased my torque converter from Hughes in Arizona. They have couplers also.
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  #7  
Old 10-07-2014, 06:12 PM
JW-9 JW-9 is offline
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K, thankyou. How do u like the direct drive ?
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  #8  
Old 10-08-2014, 10:29 PM
340king 340king is offline
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Default Transmissions

It all depends on the rules package and the entire combination. I can honestly tell you that it never made a bit of difference in the IMCA A mod trim. I could keep up with anybody on starts and restarts, etc. In the Wissota B mod trim, I run a torque converter and many of the competitors were running Berts/Brinns/Falcons. There with a limited engine and the torque converter, I was losing a little for the first 10' after the hit of the throttle, then I kept up with the pack. I never ran direct drive with the B mod against the competition. I had the transmission and could have done that, but just didn't get it done.

In a high horsepower situation where hooking up is more important than every last ounce of power being put down, then I think you are just fine. Otherwise it may make a difference between it and an open race transmission.
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  #9  
Old 10-16-2014, 08:30 PM
JW-9 JW-9 is offline
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Still having a hard time finding this direct drive coupler . The guy in Colorado says he can do it . But sounds like its gonna b a while bfore he can even get started making it . Getting aggrivating
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  #10  
Old 10-16-2014, 09:40 PM
340king 340king is offline
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Hughes

Hughes in AZ can set you up with one. Just give them a call. It is a 27dd. They list their converters/couplers by spline count.

http://www.hughesperformance.com/ind...d=51&Itemid=34
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  #11  
Old 10-16-2014, 10:04 PM
JW-9 JW-9 is offline
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The 27dd is for a 904 ? And is that just a coupler or a converter Dummy ?
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  #12  
Old 10-16-2014, 10:07 PM
JW-9 JW-9 is offline
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My cousin said he called him Tuesday and couldnt get one . Mayb he didnt understand what we was wanting Idk
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  #13  
Old 10-17-2014, 10:14 AM
dirttrackracer dirttrackracer is offline
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JVX Inc.

1458 Chelsea Avenue

Memphis, TN 38108

Order Line: 800-727-5891

Tech Line: 901-274-7248

John Vinson

JVXRacing@comcast.net

Call JVX they do a good job. Have used theres in the past. I think the cataloge has a typo and the second list is for the 904. Remember to tell them if you are using a mid plate as he will offset the ring gear for you and also if internal or external balance.
“ THE ULTIMATE IN RACE TORQUEFLITES ’’
CIRCLE TRACK TRANSMISSIONS & ACCESSORIES
“CIRCLE MAGIC’’ TRANSMISSION
These transmissions are designed for use without a torque converter. These
units are built with the same racing components and oil circuit modifications as
all our competition torqueflites. Due to severe wheel bounce caused by some
track conditions the Circle Magic transmissions are built without an overrun
clutch. As with all performance transmissions JVX recommends the use of an
approved transmission shield. These units are assembled with a JVX Advantage
Manual Valve Body, deep oil pan, and filter extension.
B / RB ( 361-383-400-426W-426H-440 )
727 “CIRCLE MAGIC’’ 1967-ON 72703
A ( 273-318-340-360 )
727 “CIRCLE MAGIC’’ 1967-ON 72603
904 “CIRCLE MAGIC’’ 1968-ON 90503
999 “CIRCLE MAGIC’’ 1968-ON 90603
518 “CIRCLE MAGIC’’ 1988-ON 51803
FRONT PUMP DRIVES
Front pump drives replace the torque converter when
using a “Circle Magic’’ transmission. They are lighter than a
torque converter and eliminate the “fluid coupling.’’
727 - 518 TORQUEFLITE
318-340-361-383-400-426W-426H-440 CU. IN.
STEEL CRANKSHAFT NO WEIGHT 72726*
340 CU. IN. CAST CRANKSHAFT TWO WEIGHTS 72641*
360 CU. IN. CAST CRANKSHAFT ONE WEIGHT 72724*
400-440 CU. IN. CAST CRANKSHAFT ONE WEIGHT 72389*
727 - 518 TORQUEFLITE
318-340 STEEL CRANKSHAFT NO WEIGHT 90384*
340 CU. IN. CAST CRANKSHAFT TWO WEIGHTS 90641*
360 CU. IN. CAST CRANKSHAFT ONE WEIGHT 90388*
*Must specify with or without mid-plate. If mid-plate is used must specify thickness.
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  #14  
Old 10-17-2014, 10:37 AM
JW-9 JW-9 is offline
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Just called jvx , they dont do it anymore either
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  #15  
Old 10-17-2014, 12:50 PM
JW-9 JW-9 is offline
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Called Hughes . They dont make them anymore either. About to give up . And do something different
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  #16  
Old 10-17-2014, 07:13 PM
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Find a race friendly machine shop and have them build one for you. I've been trying to get in touch with my buddy who can do it for me… gotta get a donor torque convertor first. I think I sold mine.
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  #17  
Old 10-17-2014, 07:36 PM
JW-9 JW-9 is offline
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Yea , thats what im thinkn
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  #18  
Old 10-18-2014, 07:47 AM
Krooser Krooser is offline
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Quote:
Originally Posted by JW-9 View Post
Yea , thats what im thinkn
I'm going to try to visit my machinist buddy today...
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  #19  
Old 10-18-2014, 08:56 AM
JW-9 JW-9 is offline
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See if he can make 2 . Lol
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  #20  
Old 12-09-2014, 01:57 AM
Krooser Krooser is offline
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A couple things…

First... I finally got in touch with my machine shop guy and he has my old torque convertor and i hope to hear from him soon.

Second… I need a 6.31 final drive ratio for the tracks I'll be running. I can get this running a 4.10 with my 904 in second. I know this has been covered before but I just need to know that the trans will handle this OK.

I've also done some research about the 904 and some say the rear sprag is a weak point… anyone have one grenade?
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  #21  
Old 12-09-2014, 08:42 PM
dirttrackracer dirttrackracer is offline
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A 904 will do fine. Been running mine for last 3 seasons no problem. It's totally stock from the junkyard. I use a cooler as I run a torque converter if you run direct drive just run a hose between the two cooler fittings as it lobes the rear governor area.
As far as I know second in a 904 is 1.45 so.... 1.45x4.10=5.95. Not quite your 6.31...
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  #22  
Old 12-09-2014, 11:49 PM
Krooser Krooser is offline
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Quote:
Originally Posted by dirttrackracer View Post
A 904 will do fine. Been running mine for last 3 seasons no problem. It's totally stock from the junkyard. I use a cooler as I run a torque converter if you run direct drive just run a hose between the two cooler fittings as it lobes the rear governor area.
As far as I know second in a 904 is 1.45 so.... 1.45x4.10=5.95. Not quite your 6.31...
My info sez 2nd is 1.54 but it really doesn't make a huge difference. The TQ of the 360 should make up the difference. I can always use a 4.30 if I want to buzz it.

I know some guys remove the governor but I really don't know why…

Good tip on connecting the cooler fittings… thanks.

I got this trans several years ago… I'm going to pull the front pump to drill and tap it for the ball valve for the fluid bypass… that will give me a peek inside to see what it looks like. If I have to I'll do a rebuild. It's been a LOT of years since I've done an automatic trans rebuild… about 1968. But I did a lot of them with a friend as side jobs when we both worked at the same shop. Time to dust off my snap ring pliers!
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  #23  
Old 12-10-2014, 10:49 PM
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cageman cageman is offline
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Confused

I made my own years ago. I would post a picture, but this archaic message board and cell phones dont get along.
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  #24  
Old 12-11-2014, 12:10 AM
dirttrackracer dirttrackracer is offline
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1.54_1 is the Chevy turbo 350 second gear.
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  #25  
Old 12-11-2014, 12:50 AM
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Quote:
Originally Posted by dirttrackracer View Post
1.54_1 is the Chevy turbo 350 second gear.
'My Mopar' sez 1.45 w/727 … 1.54 w/904… I've also read that 1981 and newer were the 1.54's and earlier units were 1.45.
Gotta find out what year mine is… I can get more if I need one with the right ratio.

UPON FURTHER REVIEW….Did some research and found my trans is an A-999 1987 truck application. Originally a lock-up deal. Wide ratio with a 1.54 second gear. Now I know. This model has five clutches in the front pack and four in the rear as opposed to three in the regular 904… or so it sez. Should be a good deal...
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  #26  
Old 12-11-2014, 12:58 AM
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Quote:
Originally Posted by cageman View Post
I made my own years ago. I would post a picture, but this archaic message board and cell phones dont get along.
Set up a Photobucket account… that's what I use.

Hey is that your Dad that was featured in Simes Graphics new Race Promoter Magazine?
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  #27  
Old 12-11-2014, 12:48 PM
dirttrackracer dirttrackracer is offline
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Well I learn something new everytime I visit this forum!
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  #28  
Old 12-11-2014, 03:25 PM
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Quote:
Originally Posted by dirttrackracer View Post
Well I learn something new everytime I visit this forum!
So did I!!!!

I also found out how much it costs to do my J heads… that was also a surprise.
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  #29  
Old 12-12-2014, 10:10 AM
dirttrackracer dirttrackracer is offline
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Machine shop wanted 600 here to put guides and valves in a set for me. that included the valves but not springs keepers or retainers.
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  #30  
Old 12-13-2014, 09:36 AM
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Quote:
Originally Posted by dirttrackracer View Post
Machine shop wanted 600 here to put guides and valves in a set for me. that included the valves but not springs keepers or retainers.
My bill was $840.00… new guides, machine for big valves, angle mill the deck, mill the intake surface, 5 angle valve job, Si stainless 2.02/1.6 +.100 Chevy valves, Comp 911-16 springs (not real happy about those), good retainers and hardened locks, PC seals, just a little bowl work to blend the valves to the bowl… you know the drill.

I can take the blame for the Comp springs. My guy was a one man shop for the last several years… work got backed up. He hired a new guy to help and his stuff is getting done a lot faster now. I have two new sets of springs on my shelf from another Mopar build and an Olds build I quit on… I was going to take them to the shop so he could use whatever was best. Never made it in time.

Both of those spring sets would have been about 120-130#'s on the seat and 340#'s open. The Comp springs are kinda wimpy @ 122/309 IIRC. My guy sez they should be good to 7K plus… if I don't like 'em I can change 'em.
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