GT 2005 transmission fluid leak


Sep 17, 2024
8
my Ford GT parked ifor 30 days in the garage started a very big leak of transmission fluid by a transmission fluid seal # 4G7Z7A283BA on drivers's side .i went to Ford Parts and they informed that the item is no longer available so I ask for your help to find the seal which is so important at this moment . Thank You .
Best Regards
 

GT@50

GT Owner
Mark II Lifetime
Dec 14, 2019
941
Issaquah
If you're talking about an axle seal.
It's likely the flange bolts failed and flange is coming out of the trans.
This is the seal I installed in mine 10k+ miles and 6+ track days ago and it's been fine. I think it's 1mm thinner and missing a dust lip compared to stock so don't run in the Sahara.
Then you'll want to install the updated flange bolt kit. 4G7Z 4B490 A
  1. To install, reverse the removal procedure.
    • Always install a new halfshaft hub nut.
    • Tighten the new halfshaft bolts in 5 stages.
      • Stage 1: Install the new halfshaft nut.
        • Tighten to 400 Nm (295 lb-ft).
      • Stage 2: Alternately tighten the halfshaft bolts in a star pattern.
        • Tighten to 40 Nm (30 lb-ft).
      • Stage 3: Loosen the halfshaft bolts one full turn one at a time.
        • Tighten to 28 Nm (21 lb-ft), then tighten an additional 90 degrees. Repeat for remaining bolts in a circular pattern.
      • Stage 4: Drive the vehicle for at least 3 miles.
      • Stage 5: Loosen halfshaft hub nut 1/2 turn and retighten.
        • Tighten to 400 Nm (295 lb-ft).
Clean threads, washer, flange and end of stub(splined part).
Use sealer on washer to flange/stub.
Torque both bolts to 15 lb ft, then to 22 lb ft. New bolts should have loctite on them already.

You don't need to take the axle out of the car but retorque the nut, and torque the wheels to 105 lb-ft. You don't even need to pull the wheels or jack the car up to replace these parts.

I've also seen quite a mess from the VSS O ring. I'm guessing someone filled the trans from there and buggered it up on reinstallation.
 
Last edited:
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Sep 17, 2024
8
If you're talking about an axle seal.
It's likely the flange bolts failed and flange is coming out of the trans.
This is the seal I installed in mine 10k+ miles and 6+ track days ago and it's been fine. I think it's 1mm thinner and missing a dust lip compared to stock so don't run in the Sahara.
Then you'll want to install the updated flange bolt kit. 4G7Z 4B490 A
  1. To install, reverse the removal procedure.
    • Always install a new halfshaft hub nut.
    • Tighten the new halfshaft bolts in 5 stages.
      • Stage 1: Install the new halfshaft nut.
        • Tighten to 400 Nm (295 lb-ft).
      • Stage 2: Alternately tighten the halfshaft bolts in a star pattern.
        • Tighten to 40 Nm (30 lb-ft).
      • Stage 3: Loosen the halfshaft bolts one full turn one at a time.
        • Tighten to 28 Nm (21 lb-ft), then tighten an additional 90 degrees. Repeat for remaining bolts in a circular pattern.
      • Stage 4: Drive the vehicle for at least 3 miles.
      • Stage 5: Loosen halfshaft hub nut 1/2 turn and retighten.
        • Tighten to 400 Nm (295 lb-ft).
Clean threads, washer, flange and end of stub(splined part).
Use sealer on washer to flange/stub.
Torque both bolts to 15 lb ft, then to 22 lb ft. New bolts should have loctite on them already.

You don't need to take the axle out of the car but retorque the nut, and torque the wheels to 105 lb-ft. You don't even need to pull the wheels or jack the car up to replace these parts.

I've also seen quite a mess from the VSS O ring. I'm guessing someone filled the trans from there and buggered it up on reinstallation.
Thank you very much .I will follow your instruction when i get home in Brazil next October .I Alrady plced an order in the Ebay for the part .Iwill let you know when it is finished
best Regards .Edgard
 

GT@50

GT Owner
Mark II Lifetime
Dec 14, 2019
941
Issaquah
Thank you very much .I will follow your instruction when i get home in Brazil next October .I Alrady plced an order in the Ebay for the part .Iwill let you know when it is finished
best Regards .Edgard
Get the Ford flange kit too!
 
Sep 17, 2024
8
Get the Ford flange kit too!
can you please help me with the # of the Ford Flange ? Thank you so much
 

GT@50

GT Owner
Mark II Lifetime
Dec 14, 2019
941
Issaquah
can you please help me with the # of the Ford Flange ? Thank you so much
4G7Z 4B490 A
It does both sides
 
Sep 17, 2024
8
4G7Z 4B490 A
It does both sides
ONE MORE TIME .THANK YOU VERY MUCH .BEST REGARDS
 
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Sep 17, 2024
8
ONE MORE TIME .THANK YOU VERY MUCH .BEST REGARDS
again Ford Pats canecll my order .Is there any other source of parts where find that kit ?
Tnank You .
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
4,281
PM me with your email and I can help you out....
 
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Sep 17, 2024
8
PM me with your email and I can help you out....
email : edgardsaigh@moinhosantaclara.com.br
 

HighHP

GT Owner
Jun 3, 2019
469
Spokane, WA
Ok, here are more to consider;

CR Seal 52X68X8 CRW1 VTransaxle Output Shaft Seal - Vitonw/o Dust Lip
CR Seal 52X68X8 CRW1 RTransaxle Output Shaft Seal - Nitrilew/o Dust Lip
Timken 710190Transaxle Output Shaft Seal - VitonMaybe With Dust Lip
Timken 225220Transaxle Output Shaft Seal - Nitrilewith Dust Lip
SKF 20424Transaxle Output Shaft Seal - Vitonw/o Dust Lip
SKF 562937Transaxle Output Shaft Seal - VitonFully Viton Coated With Dust Lip
4G7Z-1S177-BATransaxle Output Shaft Seal with Install ToolMotorcraft BRS-108
4G7Z-4B490-ATransaxle Output Shaft Bolt Kit - Ford
GTRABTransaxle Output Shaft Bolt Kit - Accufab
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
4,281
Ok, here are more to consider;
That's a VERY useful post!
 
Sep 17, 2024
8
Ok, here are more to consider;

CR Seal 52X68X8 CRW1 VTransaxle Output Shaft Seal - Vitonw/o Dust Lip
CR Seal 52X68X8 CRW1 RTransaxle Output Shaft Seal - Nitrilew/o Dust Lip
Timken 710190Transaxle Output Shaft Seal - VitonMaybe With Dust Lip
Timken 225220Transaxle Output Shaft Seal - Nitrilewith Dust Lip
SKF 20424Transaxle Output Shaft Seal - Vitonw/o Dust Lip
SKF 562937Transaxle Output Shaft Seal - VitonFully Viton Coated With Dust Lip
4G7Z-1S177-BATransaxle Output Shaft Seal with Install ToolMotorcraft BRS-108
4G7Z-4B490-ATransaxle Output Shaft Bolt Kit - Ford
GTRABTransaxle Output Shaft Bolt Kit - Accufab
 
Sep 17, 2024
8
thank You however I tried to buy items 4G7Z-18177-BA AND 4G7Z-48490-A does not match
according to the FordPartsGiant.com ..Can you help me with those part numbers ?
Best Regards .
 

NorthwoodGT

GT Owner
Jun 12, 2009
1,217
Michigan
thank You however I tried to buy items 4G7Z-18177-BA AND 4G7Z-48490-A does not match
according to the FordPartsGiant.com ..Can you help me with those part numbers ?
Best Regards .
you're not plugging in the correct part numbers. look again
4G7Z-1S177-BATransaxle Output Shaft Seal with Install ToolMotorcraft BRS-108
4G7Z-4B490-ATransaxle Output Shaft Bolt Kit - Ford
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
4,281
Edgard, while it might be nice to have the seals on-hand, in my experience it is doubtful that any of the seals will need to be replaced. What has happened to your GT is that the two bolts that secure the output flange t the transaxle output shaft have been compromised. They have wither broken off or backed themselves all the way out. This is what has caused the fluid leak. Now, it IS possible that once these bolts had let go the loose output flange damaged the seals - but honestly, typically this doesn't happen.