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John Cope built my 904. It has been in my 71 Swinger for over 10 years. 408 stroker making north of 500 hp has not shucked it yet.

If you are looking for someone to put together a 904 for you, see John Cope (Cope Racing Transmissions). He is in Lowell IN. I have had a 904 behind my 408 with 550+ HP for many years, street use. Not one hiccup!

John built a 904 for my Dart back in 2012. The 408 is 550+ hp I do not race it, but have done over 100 all outs with it. Awesome tranny. Also, I was sitting talking with him at Mopar nats several years ago. Lots of Mopar Super Stockers there. He told me that more than 30 of those guys were...

I guess I did not want to take any chances and had Inland Empire build a 3 1/2 unit with 1350's. It was spendy......about 600.

Thanks all for your replies!!

I would appreciate if someone could measure the distance from the end of the trans yoke seal to the end of the output shaft. See my little diagram below. I am having Inland Empire build me a driveshaft and they needed this dimension. I cannot get to mine right now as it is in the car with a...

Awesome!!

Funny!!

I would not mind giving a gyro a whirl one of these days

Cool stuff Dart...

No, my brother and I own a manufacturing company of about 20 people. I am the engineering mgr. Work with CAT, John Deere, Toyota. I did fly an Archer once and about 30 other planes. Best ride though was in the back of a P51-D. Friend of mine had 2 of them. He had taken the fuel tank from...

That's funny on the fence posts. I still have the original one out of the car you can add to your fence. It would probably look like a candy cane if I put it in the Dart now.

Were you a flier in the Air Force? I never got that far, but had my civilian CFII and Twin Instructor

Everything was brand new when I put the car together, probably only have about 2000 miles on the car, I did check for any spline play a while back, but good. Thanks.

Outstanding video. I am a mech engineer and can fully understand. Looks like I have some things to check. Also, I am running Caltracs with about 1/4" play for the street, so I have to take into account my pinion movement.

No, just for my bolt pattern.

That is a little encouraging, since the guy told me that I have put changing the pinion angle to the bottom of my todo list. I did measure everything a couple of years ago and if I recall I was out on the pinion by about 2 1/2 degrees...can't remember which way. I will look for the...

I had another driveshaft builder tell me that the incorrect angles would not cause a vibration.....was he not correct?

Thanks!!

This is a possibility!!

Yup, you may be correct. I will look up the app. Thanks.....!

Billet Specialties Street Lites

Still not resolved. Took the Dart out yesterday and was hard on it till about 95 mph. Not super horrible, but pretty good vibration, even after letting off till speed decreased. It is not wheel speed and not engine speed as I have had it over 6600 rpm in first and second...does not occur...

Retroboy, greetings...6 weeks! and you have already paid for the parts? I would be getting concerned. Quick communication is one of the ways that I determine the integrity of a business no matter their size. For the little guy to compete, he needs to be "on it", not only with shipments, but...

Did the same darn thing Fisher, went out for a jaunt, parked in the driveway with it shut off for 10 minutes, came back out to move into garage and shifter would barely move. I have small block with 1 7/8 TTI's. I do have a mini starter and the B and M shifter came with a pretty long cable. I...

a few years back I was at the Mopar Nats in Indy. I was talking to John while he was eating a snack. Probably 3 to 4 guys came up to him asking some questions...these are people that were running his trans. John told me that there were probably more than 50 of the racers there that day...

John Cope Racing Transmissions. All he does is Torque flights. He is in NW Indiana. coperacingtrans.com He built me a 904....zero complaints.

Agree with Fishy...did my first 727 when I was 19 and surprisingly it worked fine. Put a full Transgo kit in it. Also, I am pretty much north of 500 hp and run a 904 and happy as a clam with it.

Thanks.....!

Does the one on your wife's Swinger look like the one in the picture I posted? I have searched for anything that looks like this and cannot find.