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Results 1 to 6 of 6
  1. #1
    Join Date
    Jul 2013
    Location
    Kountze,TX
    Posts
    32

    4R70W behind 460

    I know there are adapter kits for this swap, and a computer is needed, but what all mods are necessary to make this trans live with a 525hp 460? I have a 460 with a C6 in a 1963 Galaxie, but sure could use an overdrive. Not enough room in the tunnel for an E4OD. Pretty sure the 4R would fit.

  2. #2
    Join Date
    Jul 2013
    Location
    Kountze,TX
    Posts
    32
    Nobody?

  3. #3
    Join Date
    Mar 2015
    Location
    Las Vegas
    Posts
    2
    That's why I'm here but for a 5r55s to a 460 . I might use the 4r70w or 4r75w if it can shift into overdrive at WOT .
    Life begins at 200 MPH , cops make me fell like a zombie .

  4. #4
    Join Date
    May 2014
    Location
    Tucson, AZ
    Posts
    31
    I've got a stroked 351W (to 408 cid) that's generating about 500 hp and 520 ft-lbs of torque (torque peak occurs between 4000 and 5500 RPM). The engine is mated to a 4R70W that I had setup by a friend who owns a transmission shop, locally. The case is from a '99 V6 Mustang, the valvebody is from an '01. It was updated with the mechanical diode, extra clutches, J-mod, a B&M shift kit, and '96 electronics since the EEC-V I'm using to drive it is from a '96. The torque converter is an FB Performance 3000 RPM stall unit with triple-disc clutch. I've got the lockup functioning during WOT and the car is very quick ('71 Mustang Sportsroof weighing roughly 3100 lbs without driver). I was told however, that the bands/clutches that hold 4th gear in operation do not have as much surface area as 2nd and 3rd gear, so WOT in 4th, locked or unlocked, will eventually develop some issues... I'm not sure how to remedy that besides using upgraded friction material for the 4th gear interface.
    '71 Mustang: 10.3:1 408W SEFI-EDIS8 (EEC-V), modified 4R70W, FB 3000 stall multi-disc converter, 3.50:1 rear gears
    '79 Bronco: 8.5:1 408M SEFI-EDIS8 (EEC-IV), stock C6, reman converter, lots of extra fluid capacity and cooling, 4.11:1 rear gears

  5. #5
    Join Date
    Jun 2013
    Location
    North Georgia
    Posts
    52
    I built a 4R70 thats going behind a crown vic with a 460 swap. guy is using some sort of adapter plate, baumann controler and a custom/hybrid torque converter from Circle D

  6. #6
    Join Date
    May 2014
    Location
    Tucson, AZ
    Posts
    31
    I'm seriously looking into this now for my '79 Bronco with an EFI 400 in front of a C6, currently. I know the 4R was designed for lighter duty applications, but clearly it can be built up to handle some serious abuse. Would it withstand being behind a low revving torque monster? Would I be able to put 400 ft-lbs of torque through it at 1800 RPM and drive 35" tires via an NP205 transfer case? Vehicle weighs about 6000 lbs. I don't intend to use it abusively, but would expect it to survive behind a heavy vehicle that occasionally rock crawls and generates a lot of torque at low engine speeds. I was thinking the '99+ 4WD Explorer transmission might mate up to the NP205 without too much difficulty.
    '71 Mustang: 10.3:1 408W SEFI-EDIS8 (EEC-V), modified 4R70W, FB 3000 stall multi-disc converter, 3.50:1 rear gears
    '79 Bronco: 8.5:1 408M SEFI-EDIS8 (EEC-IV), stock C6, reman converter, lots of extra fluid capacity and cooling, 4.11:1 rear gears

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