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Axle and seal

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jpmxrider489

10+ Year Contributor
2,411
146
Apr 4, 2010
pittsburgh, Pennsylvania
I just replaced both axle seals on my 95 tsi. I got new axles as well. After I installed everything both were leaking between the seal and the axle. So I know I need 37mm seal. Does the axle where it slides into the seal need to be 37mm? My old axles measured 41. The shaft is the same just not where it slides into the seal. Maybe I need the 35mm seal to fit more snug on my axle? I also replaced the seals a second time and still the same thing. My new axles measure 37mm. I can just slide the seal over the axle easily. My old axle that measure 41 supposed to go into the new 37mm seal?
 

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Not sure if your fwd or AWD:

AWD:
  • L: MD719710
  • R: MD707184
FWD:

  • L/R: MD742053

You may be using FWD axle seals on and AWD, which are larger due to the axle diameter. I would also recommend using OEM seals. I put a light coat of gear oil on the outer mating surface to ease installation. Additionally, I would recommend putting some gear oil in/around the lip so it does not get marred when installing the axle. If AWD, there is a slightly different procedure for the left/driver side:

Per FSM:

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Install the oil seal flange part so that the 3-mm (.12in.) hole
faces the bottom of the transaxle.

Caution
Apply transmission oil to the oil seal lip before installing.
The little hole in the seal will face 6 o'clock, and the notch will face 12 o'clock.
 
I got the oem seals from extreme. You can see in the pics where the seals sit in the tranny. The other pic where the axle measures 41mm is that the part that goes in the seal? If so is that supposed to fit in the 37mm seal? My axles are 37mm but can easily slide on and off. How can you tell if the axles are wrong? Can someone measure that on there axles if they have any laying around?
 
I don't have a set of FWD axles available to measure. I can confirm the OEM seals are 37 mm. Could you provide the manufacturer name and part numbers for those axles?
 
weve already given you the answer. you have the wrong axle. sombody probably mixed up early 1g cups on you 2g or worse you actually have 1g axles and just didnt compare the lengths yet. take them back and vefify part numbers
 
Part numbers check from Rockauto. I'm with Paul on this one though. The axles are your issue, even if the part numbers are good, the parts aren't right.
 
2G FWD turbo axles measure 37mm where the transaxle seal sits. The cups you have on the axles that measure 41mm are not right.
 
Yes. That is the portion of the axle the seal will be hugging. The seal should be practically size-on-size with that area.
 
That's odd. The old axles clearly measured 41. Either previous owner shoved them in with no leaks or there is a 41mm seal? If my new axles measure 37mm like there supposed to then I have no idea why it's leaking.
 
Let me clarify. Before all this I had the old axles which in the picture are 41mm and I am unsure what seals were in the car. Either the guy shoved them in with no leaks or there is a 41mm seal? Now I got a 37mm seal with 37mm axle which is size on size and it leaks. So makes me think there is something else.
 
I can't say any thing other than quality issue or install error. 37mm is what it is meant to be. You'd have to do a little research on your own to find a 41mm seal if you wanted to go back that route.
 
The tolerance isn't that tight a little too close or far wont matter. You sure you don't have a diff issue? Front diff rides on taper bearings on fwd. Any play will give you not only axial but radial movement as well. Did you put any lube on the seals
 
I did put lube on the seals. Some people say to leave the lip of the seal stick out a bit just so the seal itself is in the tranny. I thought I put it in to far. Then I thought the axles were wrong because the new ones are different from the old being as the old cup measured 41 and the new 37. The tranny did not leak at all until I put these new seals and axles in. I would say it is not a diff issue. If getting different pictures will help just let me know. The only variable I dont know is I dont have the old seals but I dont see how they could be different than the OEM from extreme.
 
Im having a similar problem w my drivers side seal in my 99gsx. I purchased the car no motor ,no tranny in the engine bay but it had the axles still attached, no half shaft. After me and my friend put it together and ran the car, seemed like gear oil was just coming out significantly from the d/s seal. My car if currently on the lift and trying to figure out the problem. I have a 6 bolt motor in my car, but according to the person which I bought the trans from its a 95-99 awd trans. In looking at the under the car, It looks like the intermediate shaft is pushing the seal down somewhat or like the seal is not sitting right. I reordered new seals from the dealer in hopes that my seals are bad. Could it be like stated above that I have the wrong axles? How can positively check to see if my transmission is a 95-99 or my axles are the right ones? I even loosened up the trans mounts to see if it would pick up the intermediate shaft up off the seal. That didn't work. Could it be possible my friend installed the intermediate shaft incorrectly? Im trying to post few pics of how the half shaft looks like on here but my pc is garbage cant load the pics, ill keep trying. Anyone that can help text me aybe someone can help me w this crazy problem. Thanks in advance Homer....908-906-6873. I can text the pictures from my phone...


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Well I went to the dealer and got the stock bolts to the intermediate shaft. Which was the two stock bolts, a washer and a spacer. Tried it today. This is what I found so far. When I took the two current bolts that were on the shaft, they were not the stock bolts. My friend that helped me out my car together jerry rigged one of the bolts w like 3 washers in order to hole the second hole of the intermediate shaft which he almost stripped my block. That was not installed properly. I wasent there when he did this.
When I re-installed the shaft to see if there was any excessive play w the Trans, w the two stock bolts there was non. There's a curve ball to this equation though, he apparently stuck the wrong bolt in the block closest to the Trans causing it to partially strip and now that hole doesn't want to take the stock bolt so I have to re-tap it. Smfh. So far I didn't have to use that spacer that the dealer provided. Although it is on the diagram that I need it. My AC compressor bracket, which I researched there's a few of them I think or few ways to do this. I have the correct one thank god. Anther thing I was worried about was that I have a 6bolt block and a 99 transmission. The axles I believe they are from the correct year to my 99 gsx. I guess we will see. I'll be installing the new Trans seal tomorrow hopefully. I'll let you guys know.
 
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