GMAN
Dedicated LVC Member
Will this tranny work in the Mark?
http://houston.craigslist.org/pts/1697914266.html
http://houston.craigslist.org/pts/1697914266.html
Last edited:
4R70W Transmission Question
- Thread starter GMAN
- Start date
rayner601
Dedicated LVC Member
negative....sorry
Go Fast Get Tickets
Dedicated LVC Member
Longer tail shaft
MediumD
Dedicated LVC Member
It would fit if you wanted to swap tailshafts, which isn't too bad, or should work if you had a shorter driveshaft made (or a stock one shortened.) Wouldn't be a bad idea if you're also in the market for an aftermarket shaft.
BAD97LSC
Dedicated LVC Member
you'll have to change the tailshaft and the electronic internals but it could be used, its not a direct bolt in.
NoLimit95
Dedicated LVC Member
What he said except I would go with a shorter drive shaft.
MediumD
Dedicated LVC Member
So then... what I said 
NoLimit95
Dedicated LVC Member
So then... what I said
Exactly what you said.
While swapping out the internals, I would J-Mod it too. Only cost $5.00 to do.
If you change out the tailshaft housing you will also have to change out the Output shaft which means you will be full into the transmission.
Stop trying to buck the system, just have the unit you have rebuilt, by time you but that CL tranny, have all the work done to it to make it work, you will have paid more monies than you would have, to have the unit you already have gone through.
Dr. SVO phd
Stop trying to buck the system, just have the unit you have rebuilt, by time you but that CL tranny, have all the work done to it to make it work, you will have paid more monies than you would have, to have the unit you already have gone through.
Dr. SVO phd
NoLimit95
Dedicated LVC Member
If he bought the CL tranny, he could swap electrical internals out for free and do the j-mod himself for under $6.00 but then comes the price of a shorter drive shaft. If he rebuilds the POS that he already has, it's still going to be a POS after it's completed, unless he pays to have a lot of updated parts installed. This was the reason he was trying to find a 98+
So... the question is, how much is the average transmission rebuild,, "done right"?
How much would a shorter drive shaft be or to have one shortened to fit his application?
BAD97LSC
Dedicated LVC Member
1,500 vs maybe 150 to have someone shorten and weld and balance the shaft!!
NoLimit95
Dedicated LVC Member
It's a no brainer. I'd be all over that trans for that price.
So you know forsure, without a doubt, and abusolutely, positively that the CL transmission is without flaws and doesn't need to be gone through????
OK!
NoLimit95
Dedicated LVC Member
Can't say that for sure but I did buy a 98 Mark trans on CL for $250 with 60K on it and the man even brought it to my door step. He only lived 10 minutes away from me. I done the j-mod myself and electrical internal swap myself and it worked perfectly. That was my experience and hopefully GMAN's would be the same.
NoLimit95
Dedicated LVC Member
And this transmission can't handle this why? That's why there are j-mod HP drilling specs. And no, it wouldn't have anything to do with "this" conversation if it was failed to be mentioned.
NoLimit95
Dedicated LVC Member
I would do the work myself so I would know what was done and how it was done. I don't pay labor bills to anyone for anything. The last thing I would need is for someone to do a simple job like that for me. Sometimes you have to take chances but you're recommending to rebuild a POS transmission to set behind a 450 HP blown engine. :q:q:q:q that labor bill, especially when it "does" have to come back out.
GMAN
Dedicated LVC Member
Wow, Interesting debate.
i don't see why your calling the stock mark 4r70w a pos after a rebuild. After rebuilding/updating it's going to be stronger than that stock crown vic tranny and if he is sticking it behind a high hp motor either one will have to be rebuilt eventually. It's how much money you want to spend at one time.
NoLimit95
Dedicated LVC Member
93 - 97 stock 4R70W was a POS when it was new. It's still going to be a POS if it's rebuilt, unless he spends the cash for better updated components that the 98+ already has in it. I think he's looking at the best and cheapest alternative and getting the CL trans, if it's a known good trans would be the best route to take.
I don't believe he's looking at paying the cost of having a trans rebuilt plus a better TC, updated 1-2 & 2-3 accumulators and springs, not to mention other internals and then a j-mod drilled to 450 HP spec and then installation. Then you have to trust that the person that done the rebuild really knew what they were doing. Am I going to pay for and trust a 93-97 rebuilt transmission without it being modified? Not in my lifetime.
Right now he would be looking at less than $500 if he done the j-mod and installation himself. He would have a shorter drive shaft, meaning a little more strength and less being there for vibrations.
BAD97LSC
Dedicated LVC Member
me personally would never invest any amount of money into upodating a 93-97 4R70W, i would buy a 98+ and if i had to, invest money into that first, in the end, it will cost more to put money into the 93-97 trans vs the 98 and up. whats the difference between taking a chance on a used craigslist transmission vs taking a chance with buying a used car??? almost all of us on here bought our whole mark VIII used, there is more money riding on the entire used car, than a used transmission.
jrherald420
Dedicated LVC Member
When my trans took a sh*t on me last year it cost me 1300.00 or 1400.00 for a full rebuild (only thing reused was the case and pan) using the updated parts (i belive he said ther was 84 updated parts). The shop said its now rebuilt to the specs of the 04 Mach 1 transmission and should have no problems holding 450-500 hp but the TC should be upgraded first since i decided not to spend the extra for one during the rebuild.
Psychostang
Dedicated LVC Member
In jerry's trans article, it specifically states not to use the longer ouput shaft of the towncar/police crown vic in high hp applications.