4R100….rebuild AGAIN or replace….
Thread Starter
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5th Wheeling
Joined: May 2017
Posts: 27
Likes: 8
From: Las Vegas
4R100….rebuild AGAIN or replace….
Well…..here we are again. Seems like my 4R100 bit the dust again. (6.8 V10 4x4) Has been rebuilt 3 time in the last 3 years! Yes I know, apparently the person rebuilding it didn’t do a good job. Should have gone to BTS but needed truck asap at the time. Meh.
So now I’m thinking what else I can do. I was thinking about a 10R80. Not sure how hard it would be yet but did find out US Shift has a stand alone controller for it so that should work. Also, it seems like the 10R80s have a lot of issues as well?
That brought me to thinking of a ZF6 manual swap. Not sure if I want to go that route yet.
Any advice? Stop thinking so hard and just keep the 4R100? Thanks.
So now I’m thinking what else I can do. I was thinking about a 10R80. Not sure how hard it would be yet but did find out US Shift has a stand alone controller for it so that should work. Also, it seems like the 10R80s have a lot of issues as well?
That brought me to thinking of a ZF6 manual swap. Not sure if I want to go that route yet.
Any advice? Stop thinking so hard and just keep the 4R100? Thanks.
FTE Community Team
Joined: Dec 2023
Posts: 8,783
Likes: 4,238
From: sussex county, nj
your correct he's not doing something right that a normally stut trans,
swapping is going to lead to PCM wiring and dash issues issues .just find a better shop or go that bts route
swapping is going to lead to PCM wiring and dash issues issues .just find a better shop or go that bts route
Fleet Mechanic
Joined: Mar 2023
Posts: 1,585
Likes: 928
Well…..here we are again. Seems like my 4R100 bit the dust again. (6.8 V10 4x4) Has been rebuilt 3 time in the last 3 years! Yes I know, apparently the person rebuilding it didn’t do a good job. Should have gone to BTS but needed truck asap at the time. Meh.
So now I’m thinking what else I can do. I was thinking about a 10R80. Not sure how hard it would be yet but did find out US Shift has a stand alone controller for it so that should work. Also, it seems like the 10R80s have a lot of issues as well?
That brought me to thinking of a ZF6 manual swap. Not sure if I want to go that route yet.
Any advice? Stop thinking so hard and just keep the 4R100? Thanks.
So now I’m thinking what else I can do. I was thinking about a 10R80. Not sure how hard it would be yet but did find out US Shift has a stand alone controller for it so that should work. Also, it seems like the 10R80s have a lot of issues as well?
That brought me to thinking of a ZF6 manual swap. Not sure if I want to go that route yet.
Any advice? Stop thinking so hard and just keep the 4R100? Thanks.
Considering your screen name and the pic in your avatar, I'm guessing that maybe you play with the truck a little offroad. If that's the case , then you might just be killing the transmissions with heat. Spinning tires and 4x4 low range puts a ton of heat in the transmissions fluid because the torque converter never locks.
Whatever new trans you go with, I'd suggest an upgraded trans cooler and a trans temp gauge be on the list of things to buy.
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Fleet Mechanic
Joined: Mar 2023
Posts: 1,585
Likes: 928
With enough money ,,,, anything is possible.
Adapter plates are just big hunks of metal (usually aluminum, but some are steel). Might have to get an adapter plate custom made for this particular application, but with the rise and general availability of CNC machines, more and more places now have the ability to make such adapter plates. You see this stuff all time in the hot-rod world where people are adapting their favorite engine into some random car, or putting a different brand transmission behind the engine they already have.
...
Adapter plates are just big hunks of metal (usually aluminum, but some are steel). Might have to get an adapter plate custom made for this particular application, but with the rise and general availability of CNC machines, more and more places now have the ability to make such adapter plates. You see this stuff all time in the hot-rod world where people are adapting their favorite engine into some random car, or putting a different brand transmission behind the engine they already have.
...
Cargo Master
Joined: Nov 2017
Posts: 3,096
Likes: 534
From: Rock Hill, SC
Well…..here we are again. Seems like my 4R100 bit the dust again. (6.8 V10 4x4) Has been rebuilt 3 time in the last 3 years! Yes I know, apparently the person rebuilding it didn’t do a good job. Should have gone to BTS but needed truck asap at the time. Meh.
So now I’m thinking what else I can do. I was thinking about a 10R80. Not sure how hard it would be yet but did find out US Shift has a stand alone controller for it so that should work. Also, it seems like the 10R80s have a lot of issues as well?
That brought me to thinking of a ZF6 manual swap. Not sure if I want to go that route yet.
Any advice? Stop thinking so hard and just keep the 4R100? Thanks.
So now I’m thinking what else I can do. I was thinking about a 10R80. Not sure how hard it would be yet but did find out US Shift has a stand alone controller for it so that should work. Also, it seems like the 10R80s have a lot of issues as well?
That brought me to thinking of a ZF6 manual swap. Not sure if I want to go that route yet.
Any advice? Stop thinking so hard and just keep the 4R100? Thanks.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
Likes: 2,648
From: SE Florida
When the trans was rebuilt were the two trans coolers reused or replaced? If they were reused, that's the cause of the failures. There is NO WAY to flush these trans coolers clean enough to prevent them from destroying a new transmission.
If you manage to get some other transmission in there and reuse these coolers expect that trans to fail, too.
If you manage to get some other transmission in there and reuse these coolers expect that trans to fail, too.
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FTE Community Team
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Thread Starter
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5th Wheeling
Joined: May 2017
Posts: 27
Likes: 8
From: Las Vegas
Either the dude really sucks at rebuilding transmissions ,,,, or maybe your use (possible abuse) is just more than the trans can take.
Considering your screen name and the pic in your avatar, I'm guessing that maybe you play with the truck a little offroad. If that's the case , then you might just be killing the transmissions with heat. Spinning tires and 4x4 low range puts a ton of heat in the transmissions fluid because the torque converter never locks.
Whatever new trans you go with, I'd suggest an upgraded trans cooler and a trans temp gauge be on the list of things to buy.
...
Considering your screen name and the pic in your avatar, I'm guessing that maybe you play with the truck a little offroad. If that's the case , then you might just be killing the transmissions with heat. Spinning tires and 4x4 low range puts a ton of heat in the transmissions fluid because the torque converter never locks.
Whatever new trans you go with, I'd suggest an upgraded trans cooler and a trans temp gauge be on the list of things to buy.
...
You can get only the converter from BTS?? Hmmm I’ll have to look into that as well just in case. Thanks.
When the trans was rebuilt were the two trans coolers reused or replaced? If they were reused, that's the cause of the failures. There is NO WAY to flush these trans coolers clean enough to prevent them from destroying a new transmission.
If you manage to get some other transmission in there and reuse these coolers expect that trans to fail, too.
If you manage to get some other transmission in there and reuse these coolers expect that trans to fail, too.
Thread Starter
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5th Wheeling
Joined: May 2017
Posts: 27
Likes: 8
From: Las Vegas
Ah! Yes. I have seen the inside radiator bypassed when upgraded to the 6.0 cooler. Is that not the correct way to do it? Should you keep both even with the 6.0 cooler?
Moderator
Joined: Jul 2010
Posts: 12,051
Likes: 1,549
From: Media PA
That radiator loop does a whole bunch of ATF cooling!
Thread Starter
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5th Wheeling
Joined: May 2017
Posts: 27
Likes: 8
From: Las Vegas
So if it can’t be cleaned out then radiator needs to be replaced with tranny?
Fleet Mechanic
Joined: Mar 2023
Posts: 1,585
Likes: 928
Personally if I were running a v10 / 4r100, I’d bypass the in-radiator cooler when putting on the monster 6.0 trans cooler. I can’t imagine the BTU capacity of the huge 6.0 cooler not being significantly larger by itself than the stock in-radiator and tiny external trans coolers the gassers / 7.3L diesel got.
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