More than 4 speeds

[71bird]

None of the stock parts can be used with a Tremec transmission, and you have to cut the floor and in some cases the trans mount crossmember structure also. Everything is completely different, and I hope you own a machine shop, and welding equipment. Now I think getting a 4 speed OD from Passon is not much of a problem, it's the 5 speed that is in short supply.

[dangina]

from all the swaps I read out there, if your willing to cut up your floor, the viper T56 transmission is the only way to go. You can get them now fairly cheap, 6 speeds so running 4:10's is no problem, great ratios, and able to handle high hp reliably. I would be going this route if i didn't put so much time and effort into getting my car done quickly and look stock. I still may go with this setup as the passon $ is a hard pill to swallow, especially now my dollar is only 75 cents to your us dollar.

[71bird]

Do a real comparison, it's not as high of a price as you might think. With the tremec you need a special bell housing, and clutch, and hyd throw out bearing, and shifter, and drive shaft, and the list keeps going on. I think I read that the 6 speeds req require that the torsion bar cross member had to be cut, and reworked. Now, what will all of that cost to have compared to $2000 for Passon 4 speed?

[dangina]

Do a real comparison, it's not as high of a price as you might think. With the tremec you need a special bell housing, and clutch, and hyd throw out bearing, and shifter, and drive shaft, and the list keeps going on. I think I read that the 6 speeds req require that the torsion bar cross member had to be cut, and reworked. Now, what will all of that cost to have compared to $2000 for Passon 4 speed?

Your correct, you do have to cut thr cross member, seen some pretty genius ways of guys doing this on protouring.com, I have not compared other parts and additional costs, ive read guys have way less headaches with the viper over the tremec. After all the bs I have seen with my buddy who bought a tremec, id never buy one. Hes sunk over double of what he paid into that tremec and it still makes a hellova noise and tremec just passes it off like its not their fault.

[moparmarks]

Passon makes 2 OD trannys. The 833 4-spd OD conversion and the 855 5-spd.
The Tremec TKO 5-spd is a bit of work. I've done a few of them. Takes their bell housing, mount and drive shaft. Uses a Chevy clutch disc. May need some tunnel work. The Passion units are a true bolt in using all the original Mopar stuff.

[moparmarks]

Also the Tremec 5-spds shift like crap. The T-56 6-spd shifts better.

[dangina]

How are the passon ratios for the 4speed? Id be ok with this if the first 3 gears are the same with the 4th being a highway gear. I heard of guys using the later 4sp od trannys from 78?and up, although they say the gear ratios are all wrong for a track...

[71bird]

Third is 1 to 1 just like 4th in the original trans. Go to his web site, and it gives the ratios for 1st, and 2nd.

[Oldyells]

It would seem that a Passon 4 speed od would be a good choice because of direct bolt in, also notarrived to the 4.11s I'll just go to passon chart and see what jives thx ,dave

[71bird]

The only thing is Passon uses a 18 spline clutch

[dangina]

Thx to both dangina and 71 bird , I guess supply isn't meeting demand , but what about tremec ,does anyone know of difficulty getting either 5 or 6 speed? Thx dave

after the poor service my buddy has been experiencing with tremec, (brand new from tremec hasn't worked since day one, spent almost another $3000 just to get it to run proper, still doesn't run quite right, tremec stands by saying nothing is wrong with it and won't warranty it) I'd never buy one.

[Oldyells]

It seems the more I hear about tremec the less I like.Now again I'm not married to the 4.11s but would kinda like the best of both worlds with having 5 gears .It also seems passon is very mopar friendly ,so if availability were good with the passon five speed I certainly would go with that.