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Discussion Starter #1
hello all-
I'm trying to replace the diff vent assy. As suggested earlier, I removed the top of the diff vent(cap) and its spring. I ran a wire into it, but I'm guessing there's a poppet/pressure valve or something in there? It wouldn't pass through.
I was going to slip a 3/8" hoseover the tube and put another vent on the end(in vertical position) as suggested in one of the threads.
I tried GM parts direct,and other sites, for the vent or redo vent assy. All seem to show the vent assy ,but not available..Anyone know where I can get the extra vent or the whole assy?
There was a recall and it's not been done..is that something I pay for or dealer? I need the recall pinion seal done in the spring anyway. Thanks in advance.
GM mud guards installed today, I used chear weatherstrip tape under the contact edge. Still working on adapting the Solo axle back with the Curt hitch..will resolve in Spring ,when the car comes out..Will do the G2 caliper paint this week.
JC
 

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I need to do this as well. Whats the purpose of the wire you put in there?
 

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hello all-
I'm trying to replace the diff vent assy. [...]

I tried GM parts direct,and other sites, for the vent or redo vent assy. All seem to show the vent assy ,but not available..Anyone know where I can get the extra vent or the whole assy?
I assume this is the part you're looking for (?): VENT. Front Axle and Axle Center. Rear Axle. Transmission Case. 2008 Pontiac Solstice TURBO 2 DR CONVERTIBLE # 15852707

If so, it shows available there, and a google search on the part number seems to show a number of online places have it too... https://www.google.com/search?num=50&hl=en&tbo=d&q=gm+part+15852707&oq=gm+part+15852707

I need to do this as well. Whats the purpose of the wire you put in there?
I think the OP was just using a piece of wire as a probe.
 

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Discussion Starter #4
Tomato soup and sycostang67-
Question one-
I tried to run a wire into the diff vent to see if it was just a hollow tube. If so, I would just slip a hose over the vent(with the spring loaded cap removed) and run the hose up with an additional vent on the end. I put the spring and cap back on and left it alone. That brings me to question two.
Tomatosoup, thanks for the heads up locating the vent. I was looking for the entire assy( the dealer fix) to do myself. I can't seem to find that one.
If I simply put a hose on the existing vent(cap/spring removed) I'm not sure the diff will breath properly, with an additional vent on the end.One lister said to simply slip a hose over the tube, but there seems that" obstruction. The existing vent works fine, but leaves the usual film on the diff,hence my desire to rectify it.
Thanks in advance for any more suggestions
John
 

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Coming back to this thread since I found I had a copy of the TSB. Reproducing the text here, for your edification:

Bulletin No.: 07-04-20-001A
Date: November 08, 2007

Subject: Axle Fluid Seeping or Leaking From Rear Axle Vent (Install Rear Differential Hose and Vent)


Models:
2003-2007 Cadillac CTS
2004-2008 Cadillac SRX
2005-2008 Cadillac STS
2006-2008 Pontiac Solstice
2007-2008 Saturn SKY
2007-2008 Opel GT
2007-2008 Daewoo G2X


Solstice, SKY, GT and G2X Models

Some 2006 Pontiac Solstice models may have a plastic-style rear differential vent in the axle assembly. The plastic vent will need to be replaced with the new style metal vent, P/N 15852707.

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI. Determine if the leak is coming from the rear axle differential vent. If the leak is not coming from the axle vent, then do not proceed to the next step. Refer to Rear Axle Lubricant Leak Diagnosis in SI.

Remove the exhaust system. Refer to Muffler Replacement in SI.

Remove the driveline tunnel closet panel for vehicles equipped with a turbo. Refer to Driveline Tunnel Closeout Panel Replacement in SI.

Place a jack stand under the rear axle assembly.

Remove the rear axle bolts.

Lower the axle assembly to gain access to the vent.

Pry the top of the metal rear differential vent cap off.

Discard the old vent cap and spring.

Obtain a 9.50 mm (3/8 in) inside diameter hose by 35.50 cm (14 in) long of rubber low fuel pressure/oil resistant hose or equivalent, a new. differential vent, P/N 15852707, and two hose clamps. If the clamp is not positioned correctly, the vent may fall off.

Assemble the new vent onto the hose and clamp the outer shoulder of the vent.

Tighten the clamp.

Install the second clamp onto the hose.

Attach the other end of the rear differential hose assembly to the axle vent.

Position the second clamp around the shoulder of the rear axle vent and hose as you did previously.

Tighten the second clamp.

Raise the axle assembly back into the vehicle.

Install the axle bolts. Tighten the bolts to 175 N.m (129 lb ft). Remove the jack stand.

To prevent a rattle from occuring, make sure the vent cap is not touching anything when tied down.

Tie strap the hose and vent assembly to the left body cross brace.

Over-filling the differential will cause axle fluid to seep out of the rear axle vent.

Check the differential fluid level. Refer to Rear Axle Lubricant Level Inspection in SI.

Clean off any axle fluid residue with GM Brake Cleaner, P/N 12378392 (in Canada, P/N 88901247), or the equivalent. Install the driveline tunnel closet panel if equipped with a turbo. Refer to Driveline Tunnel Closet Panel Replacement in SI.

Install the exhaust system. Refer to Muffler Replacement in SI.
 

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Discussion Starter #6
Thanks Tomato- Always trying to be edified..my axle vent is plastic, so I just remove the vent cap and spring and use the remaining tube? If I'm reading the service bulletin right, it's saying to remove the plastic vent assy completely. If so, I would need two metal vent assemblies, one for the axle and one at the other end of the hose?
Thanks for the additional info. due to the Solo muffler size, I can access the vent without dropping the axle.
Thanks'
John
 
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