I ran LOW 12.7x's for 200+ passes and also ran probably 600 passes before the tranny started slipping. This doesn't include the multiple passes I made n/a'd. I would run it till you run into a problem, why create one?Yes, I know. I think I can get it in the 12's the way it is. I know it won't hold it long.
My trans would never hold above 9# boost till it started slipping. If I turned the boost down it would complete the shift. When I ran the 8.27 in the 1/8th I had to back pedal in the 1-2 & 2-3 shift-still ran 84.51mph. Man those were the days, that truck made power!With the little options there are, I think James went the right way. The 5R55S with the right bell housing. The problem I see he's having is the tuning of the tranny. If he can't get it under control and consistent then there's no way I'll be doing this.
I just wish there were options for the 5R55E and I still don't see why this tranny has such a bad rep. I have had NO, ZERO, ZILCH, and NOTTA issues from it. Then again, I don't hot lap and keep beating on it. I make a pass and slow down; same thing on the streets...get on it and slow down. I'm not a formula one driver.
I think I'm going to make some calls and see what I come up with.
I guess what I'm leading too is you can't take a tranny with over 100K on it, turn the boost up to 12LBS of boost, and call it a bad tranny cuss it didn't hold.
I'll be getting my 5R55W rebuilt when the time comes. I found a guy in CA that will do a built trans. He is the only place in the country that I found that has a hardened input shaft for it. Every other place uses the weak stock 5/8" input shaft.
Not sure if they can do much for the 5R55E trans though.
http://www.larrystransmission.com/
I'll be getting my converter from another place.
http://www.dirtydogperformance.com/converters/ford/5r55-n/s/w-/cat_12.html
Can you get a 4R70 to bolt up to your engine? If so, there is a stand-alone controller for tuning.
http://www.becontrols.com/products/products.htm
There would have to be either a custom Bellhousing made or an adaptor.
During my search I did find this. The problem is you loose overdrive but you wouldn't have to worry much about a built C4, and there are torque convertors for it.
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I'll be getting my 5R55W rebuilt when the time comes. I found a guy in CA that will do a built trans. He is the only place in the country that I found that has a hardened input shaft for it. Every other place uses the weak stock 5/8" input shaft.
Not sure if they can do much for the 5R55E trans though.
http://www.larrystransmission.com/
I'll be getting my converter from another place.
http://www.dirtydogperformance.com/converters/ford/5r55-n/s/w-/cat_12.html
Can you get a 4R70 to bolt up to your engine? If so, there is a stand-alone controller for tuning.
http://www.becontrols.com/products/products.htm