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Old 02-23-2021, 09:20 AM   #1
1998 Boxster Silver/Red
 
Join Date: Sep 2017
Location: 92262
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Exclamation Tip transmission while I'm in there...

Good morning,

After the car being down since mid-October, and a guy who the second week of November said he'd repair the tiptronic transmission "next weel" but since has had one excuse/reason after another... I've found another mechanic who with me will tackle the repair.

Forum members have suggested it is the inner shaft seal. That said...

Would someone mind sharing with me exactly which part(s) I need?

Pelican shows a torque converter seal. Is that the same as an inner shaft seal?

A part number for the correct and proper part greatly would be appreciated. Further... if there are any other seals or parts I should consider "while I'm in there" I would appreciate the/those part numbers.

Also... rear main seal. Is that something I should consider "while I'm in there"? Anything else?

Finally... any special tools that are a must have?

I'd like to get the car under repair late next week. Your guidance is much welcomed.

Thank you.

Jim

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Last edited by Starter986; 02-23-2021 at 09:28 AM.
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Old 02-24-2021, 11:21 AM   #2
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The Pelican Torque converter seal is the correct part. Buy the Porsche seal. Even though the other is OEM my experience is they are not of equal quality. Not worth a few bucks difference.

Yes changing the RMS would be a good idea, But if it's not leaking and you are not going to use the proper installation tools, then might be best left alone. If you do want to change it, then purchase the upgraded seal and rent the tools from LNE. And I know some will say it can be done with DIY tools, it simply is not worth having to possibly pull the trans again for a mulligan.

Good Luck
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Old 02-25-2021, 06:34 AM   #3
1998 Boxster Silver/Red
 
Join Date: Sep 2017
Location: 92262
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Quote:
Originally Posted by 911monty View Post
The Pelican Torque converter seal is the correct part. Buy the Porsche seal. Even though the other is OEM my experience is they are not of equal quality. Not worth a few bucks difference.

Yes changing the RMS would be a good idea, But if it's not leaking and you are not going to use the proper installation tools, then might be best left alone. If you do want to change it, then purchase the upgraded seal and rent the tools from LNE. And I know some will say it can be done with DIY tools, it simply is not worth having to possibly pull the trans again for a mulligan.

Good Luck
Thank you! I saw the Z seal... but will roll with the Porsche part.

Do you believe I should be buying new bell housing bolts... or any other bolts associated with the reinstallation of the transmision? I'm a little concerned about torquing down the bolts knowing that in some cases reusing bolts is a no-no.

Thank you!
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Old 02-25-2021, 08:05 AM   #4
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You will only need to replace bell housing bolts if you lose one. Converter to flex plate can also be reused and can be replaced later without pulling the trans if you choose to.

Now, you recently changed your trans fluid, and the trans had issues with your son driving the car hard in the mountains. The question is why did the trans blow the seal. Possibly just failed. Overheated and filled too high? How many miles did the trans have before changing the fluid? Any signs of slippage when it was driven hard?

When you pull the trans note wether the seal has failed or is pushed out. Dump the torque converter and inspect the fluid. Is it thick with clutch material? Burnt smelling? Changing fluid in a high mileage trans can sometimes cause failure by removing the clutch disk material that was circulating and the clutches start slipping.

Just trying to give some ideas to check out.

Good Luck
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Old 02-25-2021, 01:33 PM   #5
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Quote:
Originally Posted by 911monty View Post
You will only need to replace bell housing bolts if you lose one.
Good tip, but actually you Should loose the triple square bolt that is everything but useless...
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Old 02-28-2021, 09:36 AM   #6
1998 Boxster Silver/Red
 
Join Date: Sep 2017
Location: 92262
Posts: 2,225
Quote:
Originally Posted by 911monty View Post
You will only need to replace bell housing bolts if you lose one. Converter to flex plate can also be reused and can be replaced later without pulling the trans if you choose to.

Now, you recently changed your trans fluid, and the trans had issues with your son driving the car hard in the mountains. The question is why did the trans blow the seal. Possibly just failed. Overheated and filled too high? How many miles did the trans have before changing the fluid? Any signs of slippage when it was driven hard?

When you pull the trans note wether the seal has failed or is pushed out. Dump the torque converter and inspect the fluid. Is it thick with clutch material? Burnt smelling? Changing fluid in a high mileage trans can sometimes cause failure by removing the clutch disk material that was circulating and the clutches start slipping.

Just trying to give some ideas to check out.

Good Luck
Sorry for the delay in responding to your questions.

I will have my mechanic inspect the TC fluid. I had changed the transmission filter and fluid ~1,200 miles before the failure. At that time the pan was clean with no debris.

Were there signs of slippage when driven hard? Good question. My son was driving it... and there were twisties where he would "gun it" paddle shifting up and down. The Rs were all over the map. Up. Down. Up. Down. I was just enjoying the drive. I didn't "feel" any slipping while I was listening to and watching the shifts. Anyhow... at some point I smelled "smoke"... then it began filling the cabin (top was down). At that point I told my son to pull over and "pull over" was about two country blocks away. I told him to not shift or give it gas and relatively we rolled to a stop.

I got out... looked under... and fluid was pouring out.

When I pulled the pan the tranny fluid didn't look extraordinarily dark (it had been only ~1,200 miles)... and the filter looked good with no debris at all or discoloration.

This morning ordered the output shaft seal (Pelican/Porsche) and have on hand 9-10L of Pentosin 1... new trans filter... pan gasket.

My mechanic likely will pick it up next week... trailer it to his garage... and I'll be there during the repair assisting where I am able. It's been 4+ months since it failed and 3 months of that was spent "waiting" for another mechanic to pick it up. I fired him. New guy is on the ball.

A great Sunday to you.

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