Re: A518 big block trans
[Re: stumpy]
#744164
07/09/10 06:39 PM
07/09/10 06:39 PM
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Joined: Jun 2010
Posts: 798 Houston TX
GregCon
OP
super stock
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OP
super stock
Joined: Jun 2010
Posts: 798
Houston TX
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I made a jig,essentially, that registered on the dowel pin holes in the bellhousing and the pump housing register on the trans. It held it all in alignment during welding. The proof of that is in the fact that the runout was very minimal after it was all done. Also after welding I put the whole case in the lathe and trued up the face so it is perpendicular to the C/L of the crankshaft and parallel with the engine block mounting face.
I actually made two - the first one had some slight problems I chalked up to learning. It would still work, though.
Two things that are interesting:
1) There is a certain point on a 727 case where small and big block cases 'come together' - that's where you make the cut. The match up is almost perfect at that point.
2) When welding the two pieces together, a lot of amperage is needed due to the large heat sink effect of the aluminum. .080" disappeared in the process. What that means is I had to leave .080" extra on the bellhousing (or on the case) and it would 'suck in' during weld to arrive at the desired final case depth (the distance from the face of the bellhousing to the face of the pump register).
One other thing - the aluminum of the 727 case, being over 20 tears old, had a lot of oil soaked in it. No matter how much it was cleaned ahead of time, it would 'boil out' and made welding tough.
Last edited by GregCon; 07/09/10 06:41 PM.
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Re: A518 big block trans
[Re: Dakota_Don]
#744168
07/10/10 03:40 AM
07/10/10 03:40 AM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
ok, what would you charge to do this?? or give us directions on how to do it.. Plzzzzzzzzzzzzz
Unless you've got the time, inclination and spare 727 to cut, why would you not just buy the jw ultrabell?
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Re: A518 big block trans
[Re: GregCon]
#744171
07/10/10 08:50 AM
07/10/10 08:50 AM
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Joined: May 2004
Posts: 533 North Dakota
440abody
mopar
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mopar
Joined: May 2004
Posts: 533
North Dakota
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Here is a place that does them, and a few years ago MCG featured one in the magazine. I believe from a place place in Iowa. http://phoenixtrans.com/html/chryslertrans.html Chrysler A-500 A-518 Introduced in 1989 and 1990 these transmissions are essentially the good, strong 904 and 727 trans with .69 to 1 overdrive added to the rear. 4th gear is controlled electrically, requiring a simple toggle switch to engage 4th gear or lockup in stock applications. Dimensions are very close to the 904 and 727 except for length and extra bulk in the housing to accept the overdrive assy. All linkages including kick down are the same as the 902 and 727 easing swaps considerably. A-500 Overall Length 38” Face to mount distance 24 3/8 Ratios: 1st 2.74, 2nd 1.54, 3rd 1.00, 4th .69 A-518 Overall Length 38” Face to mount distance 25 1/4 Ratios: 1st 2.45, 2nd 1.45, 3rd 1.00, 4th .69 Models and Pricing: #PTA500HD Our heavy duty replacement trans features durability and shift improvement modifications that bring this transmission's rating up to 325 horsepower. Included is our 1800-2000 stall converter. $1539.85 #PTA500SS Our street/strip model capable of up to 395 horsepower is modified with high performance bands and clutch packs, special valve body, and servo modifications. Included is our high performance converter with stall speeds up to 2800 rpm. A great trans for the Magnum crate engines. $1745.85 #PTA518HD Our heavy duty replacement trans for the 318 and 360 engines. This trans features heavy duty components and shift modifications for engines up to 395 horsepower. Comes with heavy duty torque converter with 1800 rpm stall speed. $1642.85 4x4 option ADD $206 #PTA518SS Our street/strip model capable of 500 horsepower is the choice for the high output engines or those who desire the very strongest trans for their car. This trans features high output bands and clutch packs, valve body and servo modifications, and available stall speeds to 2800 rpm with our high performance lockup torque converter. $1848.85 4x4 option ADD $206 We can build the 518 to use behind the B and RB series engines. ADD $606.67 to the trans price for this option.
Last edited by 440abody; 07/10/10 08:53 AM.
73 Dart Swinger 440/727 8.75 w/3.55's 34 Ford 3w coupe with a soon to be 1958 392HEMI!
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Re: A518 big block trans
[Re: GregCon]
#744173
07/10/10 04:04 PM
07/10/10 04:04 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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Quote:
The Ultra bell has a few issues you might or might not be able to live with. First, I believe it is limited in the size of torque converter it can hold; it is smaller internally than a stock bell.
The 11" converter is in common use anyway, not a big issue.
Quote:
Second, it attaches to the trans via the pump bolts. These bolts are small (5/16" diameter), long, and were never intended to anything but attach the pump to the case. If you look at the case itself, several of the threaded bosses are very minimal - there's not much meat around them.
Remember the Clutchflite used behind nitro funny cars? Never heard of a pump bolt failure.
Quote:
Also, as a race piece, I do not believe it offers all of the factory bosses. So if you have a column shifter or kickdown linkage you might be forced to rework your linkage which is seldom pretty.
This is a legitimate issue but cable-operated shifters and TP are popular even with stock 727 installations.
The INTERNET, the MISinformation superhighway
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Re: A518 big block trans
[Re: stumpy]
#744176
07/10/10 10:02 PM
07/10/10 10:02 PM
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Joined: Jul 2010
Posts: 1 SoCal
GearheadJake
member
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member
Joined: Jul 2010
Posts: 1
SoCal
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Just for those who don't mind using a well-engineered adapter (like I did), here's an article where it was done - https://home.comcast.net/~ehostler/A518/Part_1.pdfThe company (jvxracing dot com)has been around for a while, has great customer feedback, and the kit is all inclusive. I only had to build a shift cable bracket and have the driveshaft shortened. My setup (30 foot motorhome, beefed 440, + car trailer) has been problem free for 2 years & 17k miles.
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Re: A518 big block trans
[Re: GregCon]
#744177
10/09/13 10:14 AM
10/09/13 10:14 AM
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Joined: Jan 2003
Posts: 12,019 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,019
Benton, IL.
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This is a very timely post. I have a 518 laying on the floor here that I was getting ready to yank apart and prep to go in the Cuda. (street/strip car)
If you were to use the Ultrabell, would it help to spot weld the tranny to the new 'bell as well as Heli-Coil the pump mounting holes? The spots could be cut in the event that that tranny needed to come apart.
Master, again and still
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Re: A518 big block trans
[Re: drew72]
#744179
10/12/13 12:04 AM
10/12/13 12:04 AM
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Joined: Jan 2003
Posts: 1,490 smyrna,tn
draginmopars
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,490
smyrna,tn
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i've been using a brake lathe to cut off the bells
Ha-Ha Racin Havin Fun 101
Howard
68 "Cummins" Satellite 70 W-2 449 "More Door" Dart 70 340 Dart Swinger, 4spd 71 360 Dart Swinger 72 540/ 518 Dart Swinger 73 airwolf 446/a-500 Cuda 73 "Cummins" Crew cab-car hauler 84 446 Dodge Rampage (tube chassis) 92 CTD 11' flat bed 92 CTD club cab 07 Dodge Caliber
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