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3rd gear synchro issue


gessvt

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Just brought home a new (to me) '05 LGT 5MT wagon yesterday. During the test drive, I noticed clutch slippage in 5th, so dealer replaced the clutch assembly for me before I picked it up. Old clutch was in the car for my inspection, so dealer seems like a trustworthy guy.

 

Driving home, I noticed that 3rd gear would not engage without grinding. This happened during upshifts and downshifts, at any speed. I called the dealer and they said that their tech replaced the trans oil with Valvoline VV975 75W90 synthetic.

 

Any suggestions on what to do? Would a synchro issue show up after a new clutch install? As for oils, I've searched the forums and see a lot of references to Redline Lightweight Shockproof (trying not to be a n00b).

 

Thanks in advance! This forum helped me tremendously when I was deciding what to buy. Came down to a WRX wagon, S4 or a LGT.

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Use better trans fluid.

 

I'm partial to a mix of 3qts Redline Lightweight Shockproof and a quart of Motul Gear300 75W90.

[URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard
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I just put Extra-S in mine and it seems to really like it! A little stiff the first couple min when it's cold. (it was -20 below the other morning) but other than that it's great.

Current: 16 Crosstrek Premium w/ Eyesight & 05 Outback XT 5MT

Past Subies: 14 FXT Premium, 14 WRX hatch, 06 Legacy 2.5i SE 5MT, 98 Outback wagon

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You mean the rear diff, when you drain the tranny, your draining the front diff.

 

You can use whatever 75-90 meets the spec's in the owners manual. Extra-S seems to be the recommended oil.

 

Oh yea, IMO this will not fix the 3rd gear sycno.

 

My 4th gear sycno is going again, I have extra-S in the tranny.

305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD).  CHECK your oil, these cars use it.

 

Engine Build - Click Here

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Save your money, use the extra S. It's freaking magic. I had a 4th gear synchro issue that I was sure needed a teardown. After trying 150.00 dollars of different gear oils the Extra S stopped it....completely. I'm still amazed three months later.
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  • 2 weeks later...
You can't get 4 qts in anyway on a drain-and-fill. Usually only ~3qts goes in.
[URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard
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Try the Shockproof and Motul combo.
[URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard
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  • 6 months later...
Drained out the Extra-S and poured in Shockproof over the weekend. Crazy question but does it take some time to coat the gears? Still have same issue: grind going into 3rd after warm up.
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Nope, should be good to go right away. Sounds like you need to drop the trans, open it up, and start replacing synchros.
[URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard
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Nope, should be good to go right away. Sounds like you need to drop the trans, open it up, and start replacing synchros.

 

Thanks for the follow up. I searched your posts and saw you estimate $1000+ to have a professional transmission shop do the work. In your opinion, how long can I nurse this thing by double clutching (which has become second nature and snicks into 3rd gear every time)?

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$1000 in parts to replace all synchros and bearings, and ~$600 in labor if you pull the trans yourself (~$1100 in labor if you just drop the car off at the shop).

 

If you double clutch properly, and it doesn't grind, then you'll be fine for a while. The biggest concern is FOD, because that can wipe out the entire transmission.

[URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard
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Foreign Object Damage.
[URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard
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  • 11 months later...
A shop has a low mileage 2009 WRX 5MT coming in. Is this a swap possibility? Shop states that it also has a 4.11, but I'm seeing threads that say final drive is 3.9 for the '09 WRX.
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It's been a year. You haven't had this fixed yet ?

 

Where do you live, I have a tranny guy that rebuilt my 5mt last summer. He has great pricing.

305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD).  CHECK your oil, these cars use it.

 

Engine Build - Click Here

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It's been a year. You haven't had this fixed yet ?

 

Where do you live, I have a tranny guy that rebuilt my 5mt last summer. He has great pricing.

 

The car had other issue$ this year, so I've been double clutching. Chicago area. I'm guessing it's not worth the effort to modify the WRX trans?

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