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Thread: A prototype 6R80 trans mount and crossmember

  1. #1
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    A prototype 6R80 trans mount and crossmember

    Prototype 6R80 trans mount. When I pull the motor out (hopefully next week), I will cut off the FFR trans mounts from the frame. Then I’ll set motor back in, get the angle right and trim the long edge of the crossmember, leaving some as a gusset.

    After I see how it goes in again, I may weld the crossbmember in then cut out the center and leave tabs on the frame. Then make another plate that is a removable crossmember. I don’t think it’ll be necessary though, since the mount is on the back of the trans case instead of bottom. The flange will have to be up and above the crossmember when going in before it reaches it anyway. Once I’m sure of that, I’ll decide weather to make the crossmember removable or not. Worst case, I cut it out later, remake it to mount from the bottom and use spacers to her back up to right angle.

    This is the back


    Front. The two empty holes is where it bolts to the trans. The line is just a reference. I’ll trim off even with bottom of frame tubing once I know exactly wheee it has to go to get angle correct.


    For those interested who didn’t see in build thread, the 6R80 goes in with no problems. The back of the pan sits on the frame mounts from FFR. The angle like that isn’t quite enough (just shy of 2*). But nothing else is in the way.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  2. #2

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    Thanks for posting this, and thanks for blazing the trail for those of us who may want to use the 6R80. A bookmark for this thread is going into my "build notes" folder right now.
    Keith

  3. #3
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    Sure thing, Keith.

    I’ll also post 6r80 content here as well as build thread. Hopefully I’ll have the mount finished next week or week after (depending on how long the wife’s honey do list is for Jr’s first birthday party lol). After that, will be a break before find out if converter or gearing is on point
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  4. #4
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    I'll most likely be doing something similar too. Haven't got the engine/tranny in yet (hopefully next week) however I have the same tranny mount as you Svt and it doesn't align to the tranny (4L65e) mount holes either.

  5. #5
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    Here is a photo of the trans in the car. You can see that the threaded holes are quite far to the back of the case. Hoppefully that will help me not have to make the crossmember removable. As long as there is enough room to get the trans up high enough to clear it while going in before getting that far back. I’m fairly certain after the initial install that it’ll be fine.

    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  6. #6
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    Quote Originally Posted by JimLev View Post
    I'll most likely be doing something similar too. Haven't got the engine/tranny in yet (hopefully next week) however I have the same tranny mount as you Svt and it doesn't align to the tranny (4L65e) mount holes either.
    Jim,
    This is the trans mount I used from Amazon. Prothane 7-1604 Red 6 and 8 Cylinder Transmission Mount Kit You just have to shim it foe height. (about 2 inches)
    33 Hot Rod Stage 1 delivered on 4/27/2017, Stage 2 delivered on 9/21/2018
    LS3 376/480, 4L70E, Electric PS, Classic Auto Air, Lokar electronic sport shifter,
    Ford 8.8 w 3.73 w 4 link, Billet Specialty Legend Series MAG wheels and Mickey Thompson
    Sportsman S/R 26x8x18 front and 29x18x20 rear tires

  7. #7
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    Quote Originally Posted by HVACMAN View Post
    Jim,
    This is the trans mount I used from Amazon. Prothane 7-1604 Red 6 and 8 Cylinder Transmission Mount Kit You just have to shim it foe height. (about 2 inches)
    Thanks Andy.
    I spoke to Tony earlier today, he said the one they ship is for a Ford tranny, us GM guys need to get our own.

  8. #8
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    Got up today and got the starter index plate in, filled the converter, bolted all that back up. Then started in the trans mount. Cut the FFR brackets off the frame using sawzall and cut off wheels. Ground it smooth. Back in with the motor and trans. Then installed the new trans mount I made. Everything lined up perfectly down the center. Welded in the mount best I could. I’m going to have to clean up some welds once trans is out of the way for paint. Got me a perfect 3* angle on the motor checking at a couple diff places. I may add a gusset on the mount towards the back where it doesn’t touch the frame anywhere to add a little strength to it.

    Turning big metal into shavings.



    Motor back in, supporting and setting angle. Bolted bracket on trans then adding mount and crossmember to that




    Everything in place, angles and alignment triple checked and started welding. Can’t really see some welds. Don’t criticize to bad. I’m not a great welder in tight spots. This will fix when trans out again. You can see my centerline marks in frame bottom in last pic.

    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  9. #9
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    I contacted Lokar today and they do have a 6R80 compatible shifter. It also has a manual/sport mode. Manual mode doesn’t work with the Ford ecu they say, only with aftermarket controllers. Sport mode should work, assuming you use a donor ecu and keep the harness to the factory shifter. Using the M-9000-PMCA motor/trans/control package, or just the controls pack from ford for a donor engine/trans, I don’t know if sport mode will even work. There is no extra input in the harness to the stripped down ecu. The shifter will work for P-R-N-D, says lokar. I am going to contact FRPP and see if there is even a sport mode in the ecu (like in the mustangs) or not. I also am curious if the ecu has the ability to have a “manual” like mode where the mustang paddle shifting could be turned on by a tuner. It would be cool to have the forward/reverse manual mode work like the paddle shifters in the mustang. I don’t expect to be able to, using the stripped down controls pack ecu, but I’m going to ask the questions and maybe even poke around with the tuner when the time comes.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  10. #10
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    6R80 content! Had to modify the harness to reach the 02 sensor. I thought about loving the sensor but I’d rather have them in same place side to side, so one of the harnesses has to change.

    I put in the headers and first sections today. Glad I did before I started the trans tunnel. The driver side 02 sensor plugged right in. Plenty wire. The passenger side didn’t work. The plug for the 02 sensor comes out of the harness about 3/4 of the way down the transmission. The 02 plug falls right about there the starter is after i drilled a hole in the motor mount for the plastic holder to make it neat. So, I dissected the harness and pulled the 02 sensor wires up. I was able to slit the foil cover and unfold the fiber insulation. Once I pulled enough that I could double it back and teach the 02 sensor plug, I tucked all the fiber back in and taped it back up to reseal the harness. I made up where they come out now. I’m out of small split loom so I wrapped them with tape for now. I’ll loom it and tape it to make it look factory eventually. Pics for fun and better than I can describe.




    Finished product inside the car

    Almost finished product at starter. Loom and a good place to attach it and it’ll look wonderful and hidden
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  11. #11
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    Updating information found. The ecu gets its trigger for sport mode from the transmission. The cable from the shifter moves the lever on trans into a position past drive and the ecu sees that through the large plug. Not via a switch on the shifter. This might make a fully manual mode unlikely. But downshifting will still be possible (or upshifting if you want to do it earlier than ecu) will work. I’ve got more to look at, and the right shifter could do it, but I don’t know that one exists or can be made to work.

    Another delimma to sort out. The lever on trans has 7 positions. I expected 5 (P-R-N-D-S). So not sure what those two others are. I need to pill the factory stang shifter and see how many it has.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  12. #12
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    Update research info.

    Found two places that will make the driveshaft. Using flanges on both ends and they’ll put a splined slip yoke in the shaft itself. One online and one local. Not sure of boards policy of non supporting vendors do I won’t post publicly but all you have to do is call and ask, it seems. Wasn’t very hard to find at all. I think I’ll jse the local guy. He’s made 3 so far for me (two FFR cobras and a t bucket one) and never had any trouble.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  13. #13
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    Update. The trans tunnel fits without much headache.

    I got the trans tunnel in. It actually fits over the 6R80 easily. Making this transmission fit has been much easier than I expected it to be. Will be trying foot room later today. I also ran the main engine harness to the relay box through the top left of the tunnel.


    I did take the time to Install rivnuts in the front face of the tunnel and use the same bolts I used for the firewall to attach it. Makes it a bit of an order puzzle to assemble but it sure looks cleaner than rivets from the inside and will make sure it stays sealed.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  14. #14
    Senior Member TxMike64's Avatar
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    Quote Originally Posted by Svtfreak View Post
    ...I did take the time to Install rivnuts in the front face of the tunnel and use the same bolts I used for the firewall to attach it. Makes it a bit of an order puzzle to assemble but it sure looks cleaner than rivets from the inside and will make sure it stays sealed.
    Curious why you wouldn't put the rivnuts on the firewall and then screw the tunnel down to that. I wouldn't think the ends of the rivnuts would be very visible behind the engine, and you wouldn't need to have double jointed wrists and fingers to get behind the engine to remove the tunnel.
    -- Mike --
    TxMike64
    TxM Garage

  15. #15
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    Mike, you’re right. They wouldnt be very visible. But they would be. And I’m trying to really take this build to the next level of details like that. Honestly, a couple rivets would work just fine. And, accessing them actually isn’t very hard at all. The top one on reach side is worst, and can still get a hand in the do it. My short pattern Allen’s get back there and tightened them quite easily.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  16. #16
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    After bit messing with trans stuff for awhile, it’s time again. I’ve ran the car and filled it in park. I cut an access hole in the tunnel to fill it for now. Being a sealed trans, now I shouldn’t have to mess with it h til I change fluid and that’ll be awhile. I’ll do that on a lift. I’ll glass up that hole one day.

    The 6R80 transmission doesn’t use a slip yoke in the output. It has a flange. FFR doesn’t support this trans yet. So, after calling several online driveshaft shops as gasping at the price, I called my usual dude. He can make the driveshaft with the splined yoke in it, balanced and ready to bolt in for a much more reasonable cost. Still quite a bit more than the normal style shafts lol. So, I brought him the two flanges I have (one for each end) and the one new u joint I sourced from the FFR driveshaft. They have to order the parts for the slip yoke but said it should be ready by middle of next week. Another hurdle sorted and hopefully solved. I think that was the last “must have” hurdle, and everything else is “this’ll make it real cool” hurdles to make this trans work.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  17. #17
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    Picked up and installed the driveshaft. It’s 38 1/8” installed but the slip joint allows for the expansion and collapsing for movement. A grease fitting for the slip yoke fell perfectly accessible from the bottom. I did have to drop the rear end to get it in though.



    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  18. #18
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    Put it in today. Ready for first go cart tomorrow I hope! I will have to brace the mounting surface when I take the tunnel out. I used rivnuts as the bolts where not long enough.


    I did have to reangle the bracket to clear the frame.


    Installed and done. Will have to put a keeper to keep cable out of driveshaft. Otherwise works wonderfully. The side movement for up and down shift is real neat. Can't wait to wire that up and try it.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  19. #19
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    Converter news!

    Using power brakes (I have the ABS electro hydraulic system), the frpp crate setup converter is perfect! Not too much brake force needed to keep the car stopped. Let off and car moves. I am very pleased. With no power brakes, though, you may consider a slightly looser converter.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  20. #20
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    Sport Shifter With Factory PCM

    I've been following your build with much interest. Thanks for the 6R80 installation information. I too am installing a Coyote and 6R80 with Lokar shifter.

    Were you successful getting the Lokar shifter sport shift mode to work with the factory PCM? If so, I'd appreciate some details.

    Thanks!

  21. #21
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    I haven't attempted that yet. Honestly, ive kinda gotten side tracked with a bathroom expansion and remodel and catching up around the house. Pressure washing, etc. The next step is to get the blower on and get it tuned right, then later on I'll make attempt at those. I make no promises when, but I will be playing with that later. I put that aside when I couldn't find a wreckes 2015-18 Mustang to steal a computer plug from and can't seem to find anyone who knows what pins I'd need to attain to plug into the harness properly. But when I do, I'll Def be posting that here.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  22. #22
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    Sport Shifter With Factory PCM

    I have a lot to do before I tackle that task myself. I'll let you know if a get it figured out. Thanks.

  23. #23
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    Please do. Thanks!
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  24. #24
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    I am also using a 2nd Gen Coyote with the 6R80, but in my case in a 1970 Mach 1 restomod. I contacted Ford Performance and obtained a pin out for their controls pack. Yes the controls pack for the 2nd Gen Coyote for use with the 6R80 supports the sport shift mode, or so they said.

    5L mustang Paddle Shift0001.jpg5L mustang Paddle Shift0002.jpg
    Last edited by Alan_C; 10-08-2019 at 10:50 PM. Reason: reordered attachments

  25. #25
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    Quote Originally Posted by Alan_C View Post
    I am also using a 2nd Gen Coyote with the 6R80, but in my case in a 1970 Mach 1 restomod. I contacted Ford Performance and obtained a pin out for their controls pack. Yes the controls pack for the 2nd Gen Coyote for use with the 6R80 supports the sport shift mode, or so they said.

    5L mustang Paddle Shift0001.jpg5L mustang Paddle Shift0002.jpg
    Thank you very much for this information! I'm using a 2012 PCM, so this may not work, but I'm going to give it a try. Please let us know if you are successful.

  26. #26
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    You’re 2012 pcm pin out is very likely different.

    I have the same pin out. Power by the hour has verified that it does and will work. I’m going to hook up the Lokar switches to those pins and use it as a back and forth down and up shift function. They said they aren’t sure if the true sport shift as in the mustangs will function (and ford hasn’t and won’t say which pins to actually put it into “s” mode).
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  27. #27
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    I have the OEM 6R80 shifter and can determine which wire in the shifter harness is for the "S" sport mode. I plan to buy a Mustang GT electrical diagram and will then trace back the wire path to the ECU. It is going to be a while before I get into my wiring, so if one of you figures out the sport shift wiring in full, please post.

    Alan

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