Why do they need one? I’ve never in 55 years of racing 727s seen one fail. Never seen a strut fail. Why does it need a Kevlar band in low gear when it’s only applied in reverse?
904 race builds
- Thread starter Ceedawg
- Start date
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rmchrgr
Skate And Destroy
At least you know it's not a lockup unit. It sounds like you have a mish-mosh of parts from various applications. Might be worthwhile to get on the phone with a vendor like A&A to confirm what you have on hand and sell you what's needed to finish the job.
I knew that from the start. I’ll address the issues on the front pump this weekend then wait for those this frictions and steels to adjust the snap ring groove. Simple machine work to do. Like I said first time on the 904 so a learning curve with the BS Chrysler kept changing
I wouldn't consider my 904 as "race" but here's what I did. I utilized a five clutch forward drum, I got the widest band in there I could find. I don't remember the width now, this was about 1995 or so. I used the 5.0 KD lever. If you don't use a wide KD band, use a 3.8 or 4.2 lever. I used the spring that was included with the valve body for the accumulator. For the valve body, I used a reverse manual that had low band apply. I'm sorry, I don't remember which brand. I used a 3600-3800 TCI converter. It flashed very close to 3800 as it was a pretty stout 360. I think that's about it. I've been thinking about duplicating it for Vixen at some point. Who knows?
Kevlar was what he ran. Look at the cost of a std and kevlar, not that far apart now as far as I know.
If you are using the lockup trans sun and planets, that should be the low gear set. I think all lockups had the low gears. That's where I got my set from out of a lockup trans at a business that bought scrap metal. They sold it to me for a dollar a pound.
I prefer the A500 style pump gear. Still hear about cracked converter drive hubs today.
904>727…. Simple mopar math.
Run the stock front drum…. Much smaller mass that 727. It’ll be fine.
Strut on the kick down band…. They can flex or bend in stock form. Even welding a bolt on the back of it will suffice.
We run the A&A front clutch spring packs, but AARCUDA ran that reverse wound spring in at least two of his transmissions and they worked fine (mid to low 10 cars). Think they’re like $25.
Our amazingly stock component 904 lived for over 100 low 9 passes off the transbrake. Personally I had concerns about the input/output shafts, but they did just fine. Current 904 is an Andrews Racing Transmission unit with A&A goodies throughout. Provides a lot more confidence for us.
904>727…. Simple mopar math.
Run the stock front drum…. Much smaller mass that 727. It’ll be fine.
Strut on the kick down band…. They can flex or bend in stock form. Even welding a bolt on the back of it will suffice.
We run the A&A front clutch spring packs, but AARCUDA ran that reverse wound spring in at least two of his transmissions and they worked fine (mid to low 10 cars). Think they’re like $25.
Our amazingly stock component 904 lived for over 100 low 9 passes off the transbrake. Personally I had concerns about the input/output shafts, but they did just fine. Current 904 is an Andrews Racing Transmission unit with A&A goodies throughout. Provides a lot more confidence for us.
I found the flat hub unit is a bigger diameter than the lug type. Is it milled down to fit pump housing or housing milled out bigger? My hub is cracked so that will have to be replaced.
I sent my converter back to Ultimate and Lenny (retired) knew exactly what I was in need of and changed the drive hub.
Where are they located? How much did that cost?
I think is Lenny's old shop/name. I thought one of the employees took over when Lenny retired. Lenny stuck around for a while during the transition, not sure if he's still part timing it. His email is still on the contact page.
Custom Torque Converters for Drag Racing - Ultimate Converter Concepts
Custom Torque Converters for Drag Racing - Ultimate Converter Concepts
*Pentastar
Member
Lr band is applied on manual low.
On a stock VB yes, reverse manual no unless it’s a low band apply reverse manual VB
Custom Torque Converters for Drag Racing - Ultimate Converter Concepts
Montgomery Ragland took the business over. Haven’t dealt with him on a personal level.
On the cost….. it was quite awhile ago and it involved some other hard parts as we had the converter updated to match the W8 mill. Honestly one of things I just pay for because it needed to be done and I’d been using Lenny’s converters since 94. For me his stuff always worked and turnaround time was quick.
jimjimjimmy
lobsterman
The best converter i ever had was an Ultimate built by Lenny .
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