Does anybody know if the 4r75e trasnsmission is a plug and play swap to replace the 4r70e????????????????(both +04)

i ask because my 4r70e overdrive band is gone and they say i need a new tranny. i am putting in a 2 valve 5.4 to replace the 4.6 and eaton m112 might be in my near future. so a beeferier trans would be a good idea

any incite would be great

 

Physically it is a direct swap. Electronically, everything plugs up but the sensor data from the OSS will be incorrect because of a change from 6 to 24 'holes' on the output shaft ring gear.

This can be corrected through tuning and it's simple to do. If you put it straight in though the thing will shift through the gears and into 4th before you can get out of the driveway because the computer would think it was going 4 times faster than what it really is.

Darrin

 

i thought the ''6 to 24 holes'' was the difference between a ''w'' and the ''e'' type trasnmission. not 4r70 to 4r75.

I assume you can tear trans apart and swap the the output shaft ring gear as well?

what tuner would be able to do this. sct? i have a superchips.

 

had to bring this one back from the dead.

my transmission is on the way out and it appears there are a lot more options going with a 4r75 than a 4r70.

most threads regarding the swap seem to be a hodge podge of back and forth. what exactly goes into doing this swap?

 

take pan off, remove valve body, and replace the epc solenoid with a new one from your year of 4r70 trans, unbolt, bolt in, correct trans tuning via sct. I was the first guy to do it but I have a 4r70w which requires a wiring pig tail 159 from Ford. Easy.

 

sounds straight forward enough.

so you have to have some sort of custom tuning to get the oss calibration right?

 

yes and your tuner will have to be competent enough to adjust the shifts for the differences in the valve bodies. 5 star tuning did mine. Had my new xcal shipped the next day as well.

 

alright. thanks

 

i mistakenly put a 4r75e in, worked great in 4 low, flying threw the shifts as it should, but speedo was way off. so my question is, why would one have to change the valve bodys if the only problem is the oss?

 

how do they tune the oss?

 

No need to change the valve body. The one in there should work just fine.

 

This is easy.

The tuner opens their tuning software to the catch code of your truck. They select the parameter for the number of holes for the OSS and changes it from 6 to 24. They then save the tune file and either load it into the tuning device or send it to you to load into your device so it can be loaded into your vehicle. You load it into the truck and that's it.

D

 

then whats 'GOTTS2BME' talking about with "take pan off, remove valve body, and replace the epc solenoid with a new one from your year of 4r70 trans, unbolt, bolt in, correct trans tuning via sct. I was the first guy to do it but I have a 4r70w which requires a wiring pig tail 159 from Ford. Easy."
what for?

 

correction, why change the epc solenoid if the 4r75e works fine other than just the oss?

 

I don't know why he said that. I can only speak from my own experience building these transmissions.

D