Does anyone know which auto trans was used on a 1982 quadroporte III. Engine # is AM107 23 49 3290. Thanks.
Hi - I didn't comment on your first message because although I'm interested in the same question, I don't have any concrete information to offer. Here's how far I got.. The transmission is a Chrysler Torqueflite 727 covered in the 1979 Chrysler chassis-body manual 81.270.9001 (re the QP3 shop manual from Ivan's thecarnut.com site). In that era there were four applications of the transmission: Chrysler B/RB, Chrysler LA, AMC/Jeep, and International Harvester SV series engines. Both the AMC and LA have a bolt at the top center of the pattern. The QP3 and B/RB versions do not. I haven't found an image of the IH SV pattern yet. From what I can see (not much) of my QP3 and Jensen Interceptor from the engine compartments, the patterns look the same. If it is big-block Mopar, then Quicktime makes several drag racing bellhousings for mounting a Tremec TKO 5 speed or several types of T-56, but not T-56 Magnum (TR6060). Of course the bellhousing is just one step and I never even got that far! I hope you have better luck.
Torqueflite A727 with a Maserati specific (modified) bell housing. The torque converter is stock. I'm not 100% sure, but think that the flex plate is Maserati specific as well. Let me know if you need additional pics. I don't have measurements as the box is back in the car now. Image Unavailable, Please Login Image Unavailable, Please Login
That's perfect, thanks. I managed to track down pictures of big block and IH bellhousings from the same angle and they didn't match either, so I checked small block again and the first picture I found shows one without the top center hole. The commenter from a couple of years ago was right - this has to be the one. I did find one comment that said the top hole is there, but not used on automatics. If the various small block patterns are compatible otherwise, then Hurst <hurst-drivelines.com> makes an adapter, the OMW-1414SB for only $260. You'd still have to mill out some sections, make a custom flywheel, see about the pilot bushing, clutch release, etc, etc, etc, but it would be a start. Image Unavailable, Please Login
The 4.9L is similar in size to a 300cu in small block, yes. Why would you need a flywheel in an automatic transmission? Not sure what you mean by clutch release either, in a slushbox. It's all automatic . As far as the pilot bushing and torque converter goes, Maserati used the lockup version (Chrysler standard parts), everything mates up perfectly as the rear of the block is designed to fit with the tolerances given with the standard bell housing. I don't recall offhand the number of splines, but you can find all of this online, try Tom Hand's 727 guide on the Mopar forums. Otherwise Carl Munroe's "Torqueflite A-727 Transmission Handbook" has pretty much everything you'll ever want to know. If you have a look earlier in the Quattroporte III Catch-all thread, I wrote quite a bit about the transmission and provided a number of links while rebuilding mine. You'll also find a few notes and resources on my blog at quattroporte3.wordpress.com. If you learn more, please add to the thread or leave a comment on my blog, so we can collect all the relevant info in one place for future reference. You will probably need to source a flex plate, but any number of cars breaking should be able to provide a donor, if MIE or Campana don't have one lying around. Here's a good starting point for all things Torqueflite: The legendary torqueflite automatic transmission Hope this helps.
2006scinta's first post, which no one answered, was this: -- Does anyone know if the four cam Quattroporte engine can be used with a tremec trans instead of the 727? Was there an adapter bellhousing and flywheel conversion ever made? Thanks. -- I assumed this second one was related, so I passed on what little I'd learned before I dropped the idea.
Hmm, I never saw that post. It would probably be easiest to contact Tremec directly and ask. The very worst they could say is "no". Show them the existing setup and tell them what you want to do (the OP, not GLB), and see what they can do for you. Let us all know if it works. Just trying to be helpful. IIRC there was a guy up in Northern California who's done all sorts of mods and tweaks to the QP3, maybe someone here remembers his name. I think at one point he had even fitted an NO2 setup to one...
There was a great thread on here of a guy building up his own track car based on QPIII donor parts. He chopped the front section of the 727 off, and welded a plate to adapt his Tremec. I went out and nabbed a donor car for this very reason, but have yet to find someone to do the bellhousing conversion from the old 727. I'm all ears on this. For now, the engine sits nicely in the living room until I can get this done! RF.
That was Wil and Sandy de Groot's car, I think. This page from their blog answers a lot of questions about such a conversion: Scratch-built 'Mazzer' Roadster: Bell housing This is a direct answer to 2006scinta's original question, so yes, someone has done it. I think these days the Hurst Drivelines OMW-1414SB might be a simpler way to solve the bellhousing problem. I know I'll never get around to it, in spite of having multiple CNC mills and everything else I need (except time). I hope someone does a QP3 swap so I can live vicariously!
Thanks for all the feedback. My initial intent was to try and put a tremec on the back but after seeing the scratch built maser thread I decided I would just go back to the stock trans. So if I'm reading this right I can get a 727 trans and cut the sides for starter clearance. Is there a specific year or will any one work? I guess the flex plate would have to be Maserati to fit the crank and the torque converter would be a stock Chrysler part? Thanks.
There are so many QP3s being scrapped that it might be easier to get an original. There are two drivetrains on Ebay now, another that might be a whole car or just the transmission, two at our local yard, and another derelict car posted on this site not long ago. You'd get the whole kit that way.
The OP would benefit from the experiences of Mopar Muscle owners who have been converting TorqueFlites to manuals for many years. There are suppliers of various kits to convert the 727 TorqueFlite to Tremec 5 or 6 speeds, or add an overdrive, etc. The bell housing or an adapter plate as mentioned above will be a custom fabrication. Brownell is a supplier of custom bell housings and I'm sure they could fabricate an adapter plate if needed. Browell Bellhousing Custom Builds Aluminum and Steel Bellhousings Other resources are online "tech archives" of Mopar Action Magazine and Mopar Muscle Magazine or other Mopar chatrooms like Moparts.com, etc.. They have covered TorqueFlite/Tremec conversions. (NOTE: Keisler Engineering is a big supplier of the TorqueFlite-to-Tremec TKO conversion JUST be FOREWARNED they have entered bankruptcy proceedings, so review their status before sending them a $$ deposit on any product). Tremec TKO Five Speed Transmission Conversion - Mopar Muscle Magazine 727 Torqueflite Transmission Conversion - Crammin' The Crash Box - Mopar Muscle Magazine As an alternative, the OP could consider keeping the TorqueFlite but add a manual valve body kit or a direct-replacement overdrive unit for better performance without the customization of the full manual conversion. FULL MANUAL: torqueflite [Archive] - Moparchat - Home of MOPAR enthusiasts worldwide! Best of luck, - Art
Wow, Just what the Doctor ordered! Wish I was finished moving, and setting up my new shop, as you've re-instilled the enthusiasm for this project! Thanks for all this great info! RF.
