- Joined
- January 22, 2007
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- 10,162
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- City, State
- selkirk, manitoba
- Year, Model & Trim Level
- 98 supercharged 347 sport
for everyone that either has done the BW4406 swap, or about to, you may want to to read on. it may save you some cash, time, and frustration down the line.
2 years ago i did this swap when i did a 5L swap in my sport. i found all the parts i needed at work (scrap yard that also shreds cars). i took everything apart just to do a once over. i found that where the oil pump locks its self into the case was broken. because of that happening, it allowed the oil pump to spin causing the pick up to snap free and not allowing the case to get any oil (end result all bearing burnt out, oil pump seized, not going into 4x4, you get the picture).
i took it to a local welding shop to get them to fix it. they came back and told me that the case was made from magnesium, and they couldnt weld it, but they epoxied it. me not knowing any better at the time told them to go ahead with the repair. after that i replaced anything that needed, had a friend re assemble the case, put it in the truck. all is well.
forward to now, i am helping a fellow member do the same BW4406 swap to his limited AWD explorer, and also found another case and necessary parts at work and told him we were going to look the case over as well.
when we where just about ready to put everything back together, we noticed the same problem (his wasnt broken free, but close).
turns out, this is a common problem that not even my buddy that was doing the overhaul knew (and used to be a shop foreman at a local ford dealer for years).
what happens is even under normal driving, the oil pump will rock in the case allowing it to bang a grove into it over time. granted, the mileage in both my case and this one is not known, but this will happen faster depending how much abuse, or power is put threw the case.
after calling another friend that owns his own trans shop, i found a repair sleeve for it. for what you get, it isnt a cheap repair, however its less then finding someone that can weld the case, and even cheaper then having to rip the case back out, and rebuilding it.
even though its says 4405, it will work for a 4406.
you will need to grind some of the case for the sleeve to fit, as well as the top of the pump.
and this kiddies is why i tare down any parts that i get used
hopefully this saves some of you in the future.
2 years ago i did this swap when i did a 5L swap in my sport. i found all the parts i needed at work (scrap yard that also shreds cars). i took everything apart just to do a once over. i found that where the oil pump locks its self into the case was broken. because of that happening, it allowed the oil pump to spin causing the pick up to snap free and not allowing the case to get any oil (end result all bearing burnt out, oil pump seized, not going into 4x4, you get the picture).
i took it to a local welding shop to get them to fix it. they came back and told me that the case was made from magnesium, and they couldnt weld it, but they epoxied it. me not knowing any better at the time told them to go ahead with the repair. after that i replaced anything that needed, had a friend re assemble the case, put it in the truck. all is well.
forward to now, i am helping a fellow member do the same BW4406 swap to his limited AWD explorer, and also found another case and necessary parts at work and told him we were going to look the case over as well.
when we where just about ready to put everything back together, we noticed the same problem (his wasnt broken free, but close).
turns out, this is a common problem that not even my buddy that was doing the overhaul knew (and used to be a shop foreman at a local ford dealer for years).
what happens is even under normal driving, the oil pump will rock in the case allowing it to bang a grove into it over time. granted, the mileage in both my case and this one is not known, but this will happen faster depending how much abuse, or power is put threw the case.
after calling another friend that owns his own trans shop, i found a repair sleeve for it. for what you get, it isnt a cheap repair, however its less then finding someone that can weld the case, and even cheaper then having to rip the case back out, and rebuilding it.
even though its says 4405, it will work for a 4406.
you will need to grind some of the case for the sleeve to fit, as well as the top of the pump.
and this kiddies is why i tare down any parts that i get used
hopefully this saves some of you in the future.
