Transmission/transfer case/differential modifications and maintenance - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 22 Old 10-16-2013, 06:11 PM Thread Starter
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Transmission/transfer case/differential modifications and maintenance

Recommended:

Drain and refill front differential with 75W-90
Drain and refill rear differential with 75W-140 (use friction modifier if equipped with Limited Slip axle or use gear oil with modifier already in it)
Upgrade to OEM 08+ finned aluminum rear differential cover (requires longer bolts as well)
Drain and refill transfer case with Mercon-rated transmission fluid
Drain and refill transmission with Mercon SP (3 times back to back after heat cycling transmission)
Upgrade to OEM 08+ transmission pan and internal transmission filter
Replace inline transmission filter (Motorcraft filter)

Optional:
Aftermarket rear differential cover (AFE or Mag-Hytec)
Aftermarket front differential cover (AFE or Mag-Hytec)
Re-gear rear differential for larger tires (generally 37" and up)
Hot-flush transmission service (non-heated flush does nothing)
Aftermarket transmission pan (AFE or Mag-Hytec)
Suncoast transmission rebuild and upgrade with billet aluminum input shaft
Suncoast torque converter upgrade

I myself will be using Mobil 1 synthetic gear lube for my differentials and will be running BG Synthetic ATF in the transfer case and transmission as it is stated to be a replacement for Mercon SP and Mercon V. The aftermarket trans pan and differential covers are essentially just bling items and cost about 5 times as much as the 08+ OEM upgrades. Only thing they offer is a drain plug and a dipstick to make a fluid change easier and they use an o-ring instead of sealant along with a port to mount a temperature sensor, all of which don't really matter to me. Most people will just do a back to back to back trans fluid drain and refill to change the fluid as a hot-flush machine is not readily available in most areas. The non-heated machine will simply push 90% of the fluid back into the flush machine rendering it basically useless. The 08+ trans filter is an actual filter like the external filter instead of basically just being a screen to filter out trees and boulders and of course the external filter requires service as well. The Suncoast transmission components are heavily recommended for those who want to push the Torqshift past its limits (generally regarded as 500WHP being the limit for it) or simply as a means to rebuild and upgrade a broken unit.

Are there any specific u-joints or anything else that's recommended?
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post #2 of 22 Old 10-21-2013, 06:12 PM Thread Starter
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Bump for more info!
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post #3 of 22 Old 10-22-2013, 08:15 AM
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This may be a real dumb idea but couldn't a transmission be flushed using an old transmission fluid pan with a bung welded on it with a hose going to an empty five gallon pail then using the end of a transmission filter tube hook up a hose and connect it to the fluid intake for the transmission by going up thru a hole cut in the transmission fluid pan and sealed where it passes thru the pan with the other end of this hose in a five gallon pail of new transmission fluid. Then when you start the engine the new fluid would be drawn into the transmission and the dirty fluid would be draining out to the empty pail. One guy could be changing from reverse to drive a few times while a second guy watches for clean fluid to start coming into the drain bucket. I'm thinking then pretty much all the fluid would get changed out. IDK seems logical to me, only clean fluid going in and only dirty fluid coming out except what is in the lines going to and from the cooler plus the cooler itself as I wouldn't want to do this with a hot transmission.


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post #4 of 22 Old 10-22-2013, 08:56 AM
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Sticky Request?!
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post #5 of 22 Old 10-22-2013, 09:17 AM
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So the 6.0 uses FT-144 internal filter

the 6.4 08+ uses FT-180 internal filter

Are they the same in size???

will it fit with a trans pan for 6.0 trans??
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post #6 of 22 Old 10-22-2013, 09:25 AM
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Quote:
Originally Posted by bgraiders323 View Post
So the 6.0 uses FT-144 internal filter

the 6.4 08+ uses FT-180 internal filter

Are they the same in size???

will it fit with a trans pan for 6.0 trans??
1) No

2) No, need the 6.4 pan


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #7 of 22 Old 10-22-2013, 09:33 AM
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Quote:
Originally Posted by Term3 View Post
1) No

2) No, need the 6.4 pan


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LOL I just researched it more and found that out.

But thanx for the info. It'll help everyone else out.

Well I think im gonna have to sell my Mag-Hytec Trans Pan. 5R110

So I can get the 5R110W trans pan

Last edited by bgraiders323; 10-22-2013 at 09:38 AM.
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post #8 of 22 Old 10-22-2013, 03:00 PM
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Quote:
Recommended:

Drain and refill front differential with 75W-90
Drain and refill rear differential with 75W-140 (use friction modifier if equipped with Limited Slip axle or use gear oil with modifier already in it)
Upgrade to OEM 08+ finned aluminum rear differential cover (requires longer bolts as well)
Drain and refill transfer case with Mercon-rated transmission fluid
Drain and refill transmission with Mercon SP (3 times back to back after heat cycling transmission) WHY??? It's fine to just drain and refill with a shorter interval.
Upgrade to OEM 08+ transmission pan and internal transmission filter
Replace inline transmission filter (Motorcraft filter)

Optional:
Aftermarket rear differential cover (AFE or Mag-Hytec) WHY???
Aftermarket front differential cover (AFE or Mag-Hytec) WHY???
Re-gear rear differential for larger tires (generally 37" and up)
Hot-flush transmission service Great Idea!! (non-heated flush does nothing: So you say no real evidence to back this claim)
Aftermarket transmission pan (AFE or Mag-Hytec) WHY???
Suncoast transmission rebuild and upgrade with billet aluminum input shaft There are other companies out there.
Suncoast torque converter upgrade There are cheaper units out there.
Are you asking questions or just posting info to drum up business??


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post #9 of 22 Old 10-22-2013, 03:31 PM
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We really need info like this made as a sticky??


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #10 of 22 Old 10-22-2013, 03:56 PM
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Any more stickies and it will be a whole page alone.

If PS.org had a desk........



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